Merge https://github.com/IntellectualSites/FastAsyncWorldEdit

.github/workflows/announce-release-on-discord.yml

@@ -13,7 +13,7 @@ jobs:
           DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
           DISCORD_USERNAME: FastAsyncWorldEdit Release
           DISCORD_AVATAR: https://raw.githubusercontent.com/IntellectualSites/Assets/main/plugins/FastAsyncWorldEdit/FastAsyncWorldEdit.png
-        uses: Ilshidur/action-discord@0c4b27844ba47cb1c7bee539c8eead5284ce9fa9 # ratchet:Ilshidur/action-discord@0.3.2
+        uses: Ilshidur/action-discord@0.3.2
         with:
           args: |
             "<@&525015715300900875> <@&706463154804097105> <@&671372968462516240>"

.github/workflows/build-pr.yml

@@ -16,6 +16,12 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: temurin
+          cache: gradle
           java-version: 17
       - name: Build on ${{ matrix.os }}
-        run: ./gradlew clean build
+        run: ./gradlew build -s
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        with:
+            name: FastAsyncWorldEdit-SNAPSHOT
+            path: worldedit-bukkit/build/libs/FastAsyncWorldEdit-Bukkit-*.jar

.github/workflows/codeql.yml

@@ -1,5 +1,7 @@
 name: "CodeQL"
 on:
+  push:
+    branches: [main]
   pull_request:
     # The branches below must be a subset of the branches above
     branches: [main]
@@ -18,6 +20,12 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
+      - name: Setup Java
+        uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          cache: gradle
+          java-version: 17
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v2
         with:

.gitignore

@@ -33,3 +33,5 @@ worldedit-core/src/main/resources/lang/*
 /worldedit-core/.factorypath
 
 .DS_Store
+### Run server ignore
+run-*

Jenkinsfile

@@ -4,14 +4,13 @@ pipeline {
         disableConcurrentBuilds()
     }
     stages {
-        stage('Set JDK 17') {
-            steps {
-                tool name: 'Temurin-17.0.6+10', type: 'jdk'
-            }
-        }
         stage('Build') {
             steps {
-                sh './gradlew clean build'
+                withEnv([
+                        "PATH+JAVA=${tool 'Temurin-17.0.7_7'}/bin"
+                ]) {
+                    sh './gradlew clean build'
+                }
             }
         }
         stage('Archive artifacts') {

build.gradle.kts

@@ -7,7 +7,7 @@ import xyz.jpenilla.runpaper.task.RunServer
 
 plugins {
     id("io.github.gradle-nexus.publish-plugin") version "1.3.0"
-    id("xyz.jpenilla.run-paper") version "2.0.1"
+    id("xyz.jpenilla.run-paper") version "2.1.0"
 }
 
 if (!File("$rootDir/.git").exists()) {
@@ -34,7 +34,7 @@ logger.lifecycle("""
 *******************************************
 """)
 
-var rootVersion by extra("2.6.0")
+var rootVersion by extra("2.6.3")
 var snapshot by extra("SNAPSHOT")
 var revision: String by extra("")
 var buildNumber by extra("")
@@ -105,7 +105,7 @@ tasks {
 }
 
 nexusPublishing {
-    repositories {
+    this.repositories {
         sonatype {
             nexusUrl.set(URI.create("https://s01.oss.sonatype.org/service/local/"))
             snapshotRepositoryUrl.set(URI.create("https://s01.oss.sonatype.org/content/repositories/snapshots/"))

buildSrc/build.gradle.kts

@@ -22,9 +22,9 @@ val properties = Properties().also { props ->
 
 dependencies {
     implementation(gradleApi())
-    implementation("org.ajoberstar.grgit:grgit-gradle:5.0.0")
-    implementation("gradle.plugin.com.github.johnrengelman:shadow:7.1.2")
-    implementation("io.papermc.paperweight.userdev:io.papermc.paperweight.userdev.gradle.plugin:1.5.3")
+    implementation("org.ajoberstar.grgit:grgit-gradle:5.2.0")
+    implementation("com.github.johnrengelman:shadow:8.1.1")
+    implementation("io.papermc.paperweight.userdev:io.papermc.paperweight.userdev.gradle.plugin:1.5.5")
 }
 
 kotlin {

gradle/libs.versions.toml

@@ -6,12 +6,12 @@ log4j = "2.19.0"
 
 # Plugins
 dummypermscompat = "1.10"
-worldguard-bukkit = "7.0.7"
+worldguard-bukkit = "7.0.8"
 mapmanager = "1.8.0-SNAPSHOT"
 griefprevention = "16.18.1"
 griefdefender = "2.1.0-SNAPSHOT"
 residence = "4.5._13.1"
-towny = "0.98.4.18"
+towny = "0.99.1.2"
 
 # Third party
 bstats = "3.0.2"
@@ -23,7 +23,7 @@ auto-value = "1.10.1"
 findbugs = "3.0.2"
 rhino-runtime = "1.7.14"
 zstd-jni = "1.4.8-1" # Not latest as it can be difficult to obtain latest ZSTD libs
-antlr4 = "4.12.0"
+antlr4 = "4.13.0"
 json-simple = "1.1.1"
 jlibnoise = "1.0.0"
 jchronic = "0.2.4a"
@@ -36,7 +36,7 @@ text = "3.0.4"
 piston = "0.5.7"
 
 # Tests
-mockito = "5.2.0"
+mockito = "5.3.1"
 
 # Gradle plugins
 pluginyml = "0.5.3"
@@ -54,7 +54,7 @@ mapmanager = { group = "com.github.InventivetalentDev", name = "MapManager", ver
 griefprevention = { group = "com.github.TechFortress", name = "GriefPrevention", version.ref = "griefprevention" }
 griefdefender = { group = "com.griefdefender", name = "api", version.ref = "griefdefender" }
 residence = { group = "com.bekvon.bukkit.residence", name = "Residence", version.ref = "residence" }
-towny = { group = "com.github.TownyAdvanced", name = "Towny", version.ref = "towny" }
+towny = { group = "com.palmergames.bukkit.towny", name = "towny", version.ref = "towny" }
 
 # Third Party
 bstatsBase = { group = "org.bstats", name = "bstats-base", version.ref = "bstats" }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -85,9 +85,6 @@ done
 APP_BASE_NAME=${0##*/}
 APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
 
@@ -144,7 +141,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045 
+        # shellcheck disable=SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -152,7 +149,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045 
+        # shellcheck disable=SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -197,6 +194,10 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
 # Collect all arguments for the java command;
 #   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
 #     shell script including quotes and variable substitutions, so put them in

worldedit-bukkit/adapters/adapter-1_17_1/build.gradle.kts

@@ -1,3 +1,5 @@
+import io.papermc.paperweight.userdev.PaperweightUserDependenciesExtension
+
 applyPaperweightAdapterConfiguration()
 
 plugins {
@@ -19,6 +21,6 @@ configurations.all {
 
 
 dependencies {
-    paperDevBundle("1.17.1-R0.1-20220414.034903-210")
+    the<PaperweightUserDependenciesExtension>().paperDevBundle("1.17.1-R0.1-20220414.034903-210")
     compileOnly("io.papermc:paperlib")
 }

worldedit-bukkit/adapters/adapter-1_17_1/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_17_R1_2/PaperweightFaweAdapter.java

@@ -103,6 +103,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Objects;
 import java.util.OptionalInt;
 import java.util.Set;
 import java.util.function.Supplier;
@@ -658,10 +659,17 @@ public final class PaperweightFaweAdapter extends CachedBukkitAdapter implements
                 .registryAccess()
                 .ownedRegistryOrThrow(
                         Registry.BIOME_REGISTRY);
-        return biomeRegistry.stream()
-                .map(biomeRegistry::getKey)
-                .map(CraftNamespacedKey::fromMinecraft)
-                .collect(Collectors.toList());
+        List<ResourceLocation> keys = biomeRegistry.stream()
+                .map(biomeRegistry::getKey).filter(Objects::nonNull).toList();
+        List<NamespacedKey> namespacedKeys = new ArrayList<>();
+        for (ResourceLocation key : keys) {
+            try {
+                namespacedKeys.add(CraftNamespacedKey.fromMinecraft(key));
+            } catch (IllegalArgumentException e) {
+                LOGGER.error("Error converting biome key {}", key.toString(), e);
+            }
+        }
+        return namespacedKeys;
     }
 
     @Override

worldedit-bukkit/adapters/adapter-1_17_1/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_17_R1_2/PaperweightGetBlocks.java

@@ -445,10 +445,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << layer;
 
-                    // Changes may still be written to chunk SET
-                    char[] tmp = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
+                    char[] setArr = set.load(layerNo);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_17_1/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_17_R1_2/PaperweightPlatformAdapter.java

@@ -29,7 +29,9 @@ import net.minecraft.server.level.ChunkHolder;
 import net.minecraft.server.level.ChunkMap;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.TicketType;
 import net.minecraft.util.BitStorage;
+import net.minecraft.util.Unit;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.level.ChunkPos;
 import net.minecraft.world.level.LevelAccessor;
@@ -209,10 +211,12 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         } else {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunkAtIfCachedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             nmsChunk = serverLevel.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             // Avoid "async" methods from the main thread.
@@ -230,6 +234,13 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         return TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ));
     }
 
+    private static void addTicket(ServerLevel serverLevel, int chunkX, int chunkZ) {
+        // Ensure chunk is definitely loaded before applying a ticket
+        net.minecraft.server.MCUtil.MAIN_EXECUTOR.execute(() -> serverLevel
+                .getChunkSource()
+                .addRegionTicket(TicketType.PLUGIN, new ChunkPos(chunkX, chunkZ), 0, Unit.INSTANCE));
+    }
+
     public static ChunkHolder getPlayerChunk(ServerLevel nmsWorld, final int chunkX, final int chunkZ) {
         ChunkMap chunkMap = nmsWorld.getChunkSource().chunkMap;
         try {

worldedit-bukkit/adapters/adapter-1_18_2/build.gradle.kts

@@ -1,3 +1,5 @@
+import io.papermc.paperweight.userdev.PaperweightUserDependenciesExtension
+
 plugins {
     java
 }
@@ -10,6 +12,6 @@ repositories {
 
 dependencies {
     // https://papermc.io/repo/service/rest/repository/browse/maven-public/io/papermc/paper/dev-bundle/
-    paperDevBundle("1.18.2-R0.1-20220920.010157-167")
+    the<PaperweightUserDependenciesExtension>().paperDevBundle("1.18.2-R0.1-20220920.010157-167")
     compileOnly("io.papermc:paperlib")
 }

worldedit-bukkit/adapters/adapter-1_18_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_18_R2/PaperweightFaweAdapter.java

@@ -656,10 +656,17 @@ public final class PaperweightFaweAdapter extends CachedBukkitAdapter implements
                 .registryAccess()
                 .ownedRegistryOrThrow(
                         Registry.BIOME_REGISTRY);
-        return biomeRegistry.stream()
-                .map(biomeRegistry::getKey).filter(Objects::nonNull)
-                .map(CraftNamespacedKey::fromMinecraft)
-                .collect(Collectors.toList());
+        List<ResourceLocation> keys = biomeRegistry.stream()
+                .map(biomeRegistry::getKey).filter(Objects::nonNull).toList();
+        List<NamespacedKey> namespacedKeys = new ArrayList<>();
+        for (ResourceLocation key : keys) {
+            try {
+                namespacedKeys.add(CraftNamespacedKey.fromMinecraft(key));
+            } catch (IllegalArgumentException e) {
+                LOGGER.error("Error converting biome key {}", key.toString(), e);
+            }
+        }
+        return namespacedKeys;
     }
 
     @Override

worldedit-bukkit/adapters/adapter-1_18_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_18_R2/PaperweightGetBlocks.java

@@ -491,9 +491,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
+                    char[] setArr = set.load(layerNo);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_18_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_18_R2/PaperweightPlatformAdapter.java

@@ -29,9 +29,11 @@ import net.minecraft.server.level.ChunkHolder;
 import net.minecraft.server.level.ChunkMap;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.TicketType;
 import net.minecraft.util.BitStorage;
 import net.minecraft.util.SimpleBitStorage;
 import net.minecraft.util.ThreadingDetector;
+import net.minecraft.util.Unit;
 import net.minecraft.util.ZeroBitStorage;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.level.ChunkPos;
@@ -237,10 +239,12 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         } else {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunkAtIfCachedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             nmsChunk = serverLevel.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             // Avoid "async" methods from the main thread.
@@ -258,6 +262,13 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         return TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ));
     }
 
+    private static void addTicket(ServerLevel serverLevel, int chunkX, int chunkZ) {
+        // Ensure chunk is definitely loaded before applying a ticket
+        net.minecraft.server.MCUtil.MAIN_EXECUTOR.execute(() -> serverLevel
+                .getChunkSource()
+                .addRegionTicket(TicketType.PLUGIN, new ChunkPos(chunkX, chunkZ), 0, Unit.INSTANCE));
+    }
+
     public static ChunkHolder getPlayerChunk(ServerLevel nmsWorld, final int chunkX, final int chunkZ) {
         ChunkMap chunkMap = nmsWorld.getChunkSource().chunkMap;
         try {

worldedit-bukkit/adapters/adapter-1_19/build.gradle.kts

@@ -1,3 +1,5 @@
+import io.papermc.paperweight.userdev.PaperweightUserDependenciesExtension
+
 plugins {
     java
 }
@@ -9,6 +11,6 @@ repositories {
 }
 
 dependencies {
-    paperDevBundle("1.19.2-R0.1-20221206.184705-189")
+    the<PaperweightUserDependenciesExtension>().paperDevBundle("1.19.2-R0.1-20221206.184705-189")
     compileOnly("io.papermc:paperlib")
 }

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/PaperweightFaweAdapter.java

@@ -645,10 +645,17 @@ public final class PaperweightFaweAdapter extends CachedBukkitAdapter implements
                 .registryAccess()
                 .ownedRegistryOrThrow(
                         Registry.BIOME_REGISTRY);
-        return biomeRegistry.stream()
-                .map(biomeRegistry::getKey).filter(Objects::nonNull)
-                .map(CraftNamespacedKey::fromMinecraft)
-                .collect(Collectors.toList());
+        List<ResourceLocation> keys = biomeRegistry.stream()
+                .map(biomeRegistry::getKey).filter(Objects::nonNull).toList();
+        List<NamespacedKey> namespacedKeys = new ArrayList<>();
+        for (ResourceLocation key : keys) {
+            try {
+                namespacedKeys.add(CraftNamespacedKey.fromMinecraft(key));
+            } catch (IllegalArgumentException e) {
+                LOGGER.error("Error converting biome key {}", key.toString(), e);
+            }
+        }
+        return namespacedKeys;
     }
 
     @Override

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/PaperweightGetBlocks.java

@@ -488,9 +488,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
+                    char[] setArr = set.load(layerNo);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/PaperweightPlatformAdapter.java

@@ -29,10 +29,12 @@ import net.minecraft.server.level.ChunkHolder;
 import net.minecraft.server.level.ChunkMap;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.TicketType;
 import net.minecraft.util.BitStorage;
 import net.minecraft.util.ExceptionCollector;
 import net.minecraft.util.SimpleBitStorage;
 import net.minecraft.util.ThreadingDetector;
+import net.minecraft.util.Unit;
 import net.minecraft.util.ZeroBitStorage;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.level.ChunkPos;
@@ -270,10 +272,12 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         } else {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunkAtIfCachedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             nmsChunk = serverLevel.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             // Avoid "async" methods from the main thread.
@@ -291,6 +295,13 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         return TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ));
     }
 
+    private static void addTicket(ServerLevel serverLevel, int chunkX, int chunkZ) {
+        // Ensure chunk is definitely loaded before applying a ticket
+        io.papermc.paper.util.MCUtil.MAIN_EXECUTOR.execute(() -> serverLevel
+                .getChunkSource()
+                .addRegionTicket(TicketType.PLUGIN, new ChunkPos(chunkX, chunkZ), 0, Unit.INSTANCE));
+    }
+
     public static ChunkHolder getPlayerChunk(ServerLevel nmsWorld, final int chunkX, final int chunkZ) {
         ChunkMap chunkMap = nmsWorld.getChunkSource().chunkMap;
         try {

worldedit-bukkit/adapters/adapter-1_19_3/build.gradle.kts

@@ -1,3 +1,5 @@
+import io.papermc.paperweight.userdev.PaperweightUserDependenciesExtension
+
 plugins {
     java
 }
@@ -10,6 +12,6 @@ repositories {
 
 dependencies {
     // https://papermc.io/repo/service/rest/repository/browse/maven-public/io/papermc/paper/dev-bundle/
-    paperDevBundle("1.19.3-R0.1-20230312.180621-141")
+    the<PaperweightUserDependenciesExtension>().paperDevBundle("1.19.3-R0.1-20230312.180621-141")
     compileOnly("io.papermc:paperlib")
 }

worldedit-bukkit/adapters/adapter-1_19_3/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R2/PaperweightFaweAdapter.java

@@ -650,10 +650,17 @@ public final class PaperweightFaweAdapter extends CachedBukkitAdapter implements
                 .getServer()
                 .registryAccess()
                 .registryOrThrow(BIOME);
-        return biomeRegistry.stream()
-                .map(biomeRegistry::getKey).filter(Objects::nonNull)
-                .map(CraftNamespacedKey::fromMinecraft)
-                .collect(Collectors.toList());
+        List<ResourceLocation> keys = biomeRegistry.stream()
+                .map(biomeRegistry::getKey).filter(Objects::nonNull).toList();
+        List<NamespacedKey> namespacedKeys = new ArrayList<>();
+        for (ResourceLocation key : keys) {
+            try {
+                namespacedKeys.add(CraftNamespacedKey.fromMinecraft(key));
+            } catch (IllegalArgumentException e) {
+                LOGGER.error("Error converting biome key {}", key.toString(), e);
+            }
+        }
+        return namespacedKeys;
     }
 
     @Override

worldedit-bukkit/adapters/adapter-1_19_3/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R2/PaperweightGetBlocks.java

@@ -490,9 +490,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
+                    char[] setArr = set.load(layerNo);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_19_3/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R2/PaperweightPlatformAdapter.java

@@ -29,10 +29,12 @@ import net.minecraft.server.level.ChunkHolder;
 import net.minecraft.server.level.ChunkMap;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.TicketType;
 import net.minecraft.util.BitStorage;
 import net.minecraft.util.ExceptionCollector;
 import net.minecraft.util.SimpleBitStorage;
 import net.minecraft.util.ThreadingDetector;
+import net.minecraft.util.Unit;
 import net.minecraft.util.ZeroBitStorage;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.level.ChunkPos;
@@ -267,10 +269,12 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         } else {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunkAtIfCachedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             nmsChunk = serverLevel.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             // Avoid "async" methods from the main thread.
@@ -288,6 +292,13 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         return TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ));
     }
 
+    private static void addTicket(ServerLevel serverLevel, int chunkX, int chunkZ) {
+        // Ensure chunk is definitely loaded before applying a ticket
+        io.papermc.paper.util.MCUtil.MAIN_EXECUTOR.execute(() -> serverLevel
+                .getChunkSource()
+                .addRegionTicket(TicketType.PLUGIN, new ChunkPos(chunkX, chunkZ), 0, Unit.INSTANCE));
+    }
+
     public static ChunkHolder getPlayerChunk(ServerLevel nmsWorld, final int chunkX, final int chunkZ) {
         ChunkMap chunkMap = nmsWorld.getChunkSource().chunkMap;
         try {

worldedit-bukkit/adapters/adapter-1_19_4/build.gradle.kts

@@ -1,3 +1,5 @@
+import io.papermc.paperweight.userdev.PaperweightUserDependenciesExtension
+
 plugins {
     java
 }
@@ -9,6 +11,6 @@ repositories {
 }
 
 dependencies {
-    paperDevBundle("1.19.4-R0.1-20230412.010331-64")
+    the<PaperweightUserDependenciesExtension>().paperDevBundle("1.19.4-R0.1-20230601.025018-99")
     compileOnly("io.papermc:paperlib")
 }

worldedit-bukkit/adapters/adapter-1_19_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R3/PaperweightFaweAdapter.java

@@ -17,7 +17,6 @@ import com.google.common.collect.ImmutableMap;
 import com.sk89q.jnbt.Tag;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.blocks.BaseItemStack;
-import com.sk89q.worldedit.blocks.TileEntityBlock;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
 import com.sk89q.worldedit.bukkit.BukkitWorld;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
@@ -50,7 +49,6 @@ import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.block.BlockType;
-import com.sk89q.worldedit.world.block.BlockTypes;
 import com.sk89q.worldedit.world.block.BlockTypesCache;
 import com.sk89q.worldedit.world.entity.EntityType;
 import com.sk89q.worldedit.world.item.ItemType;
@@ -60,7 +58,6 @@ import net.minecraft.core.BlockPos;
 import net.minecraft.core.Registry;
 import net.minecraft.core.WritableRegistry;
 import net.minecraft.core.registries.Registries;
-import net.minecraft.nbt.IntTag;
 import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.MinecraftServer;
@@ -71,14 +68,12 @@ import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.util.StringRepresentable;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.level.Level;
 import net.minecraft.world.level.biome.Biome;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.properties.BlockStateProperties;
 import net.minecraft.world.level.block.state.properties.DirectionProperty;
 import net.minecraft.world.level.chunk.LevelChunk;
-import net.minecraft.world.level.chunk.LevelChunkSection;
 import org.apache.logging.log4j.Logger;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -86,7 +81,6 @@ import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
 import org.bukkit.TreeType;
 import org.bukkit.block.data.BlockData;
-import org.bukkit.craftbukkit.v1_19_R3.CraftChunk;
 import org.bukkit.craftbukkit.v1_19_R3.CraftServer;
 import org.bukkit.craftbukkit.v1_19_R3.CraftWorld;
 import org.bukkit.craftbukkit.v1_19_R3.block.CraftBlockState;
@@ -602,10 +596,17 @@ public final class PaperweightFaweAdapter extends CachedBukkitAdapter implements
                 .getServer()
                 .registryAccess()
                 .registryOrThrow(BIOME);
-        return biomeRegistry.stream()
-                .map(biomeRegistry::getKey).filter(Objects::nonNull)
-                .map(CraftNamespacedKey::fromMinecraft)
-                .collect(Collectors.toList());
+        List<ResourceLocation> keys = biomeRegistry.stream()
+                .map(biomeRegistry::getKey).filter(Objects::nonNull).toList();
+        List<NamespacedKey> namespacedKeys = new ArrayList<>();
+        for (ResourceLocation key : keys) {
+            try {
+                namespacedKeys.add(CraftNamespacedKey.fromMinecraft(key));
+            } catch (IllegalArgumentException e) {
+                LOGGER.error("Error converting biome key {}", key.toString(), e);
+            }
+        }
+        return namespacedKeys;
     }
 
     @Override

worldedit-bukkit/adapters/adapter-1_19_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R3/PaperweightGetBlocks.java

@@ -490,9 +490,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                     bitMask |= 1 << getSectionIndex;
 
-                    char[] tmp = set.load(layerNo);
-                    char[] setArr = new char[4096];
-                    System.arraycopy(tmp, 0, setArr, 0, 4096);
+                    char[] setArr = set.load(layerNo);
 
                     // synchronise on internal section to avoid circular locking with a continuing edit if the chunk was
                     // submitted to keep loaded internal chunks to queue target size.

worldedit-bukkit/adapters/adapter-1_19_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R3/PaperweightPlatformAdapter.java

@@ -29,10 +29,12 @@ import net.minecraft.server.level.ChunkHolder;
 import net.minecraft.server.level.ChunkMap;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.TicketType;
 import net.minecraft.util.BitStorage;
 import net.minecraft.util.ExceptionCollector;
 import net.minecraft.util.SimpleBitStorage;
 import net.minecraft.util.ThreadingDetector;
+import net.minecraft.util.Unit;
 import net.minecraft.util.ZeroBitStorage;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.level.ChunkPos;
@@ -182,7 +184,7 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
             removeBlockEntityTicker.setAccessible(true);
             methodremoveTickingBlockEntity = lookup.unreflect(removeBlockEntityTicker);
 
-            fieldRemove = BlockEntity.class.getDeclaredField(Refraction.pickName("remove", "p"));
+            fieldRemove = BlockEntity.class.getDeclaredField(Refraction.pickName("remove", "q"));
             fieldRemove.setAccessible(true);
 
             CHUNKSECTION_BASE = unsafe.arrayBaseOffset(LevelChunkSection[].class);
@@ -292,10 +294,12 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         } else {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunkAtIfCachedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             nmsChunk = serverLevel.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
+                addTicket(serverLevel, chunkX, chunkZ);
                 return nmsChunk;
             }
             // Avoid "async" methods from the main thread.
@@ -305,6 +309,7 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
             CompletableFuture<org.bukkit.Chunk> future = serverLevel.getWorld().getChunkAtAsync(chunkX, chunkZ, true, true);
             try {
                 CraftChunk chunk = (CraftChunk) future.get();
+                addTicket(serverLevel, chunkX, chunkZ);
                 return (LevelChunk) CRAFT_CHUNK_GET_HANDLE.invoke(chunk);
             } catch (Throwable e) {
                 e.printStackTrace();
@@ -313,6 +318,13 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         return TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ));
     }
 
+    private static void addTicket(ServerLevel serverLevel, int chunkX, int chunkZ) {
+        // Ensure chunk is definitely loaded before applying a ticket
+        io.papermc.paper.util.MCUtil.MAIN_EXECUTOR.execute(() -> serverLevel
+                .getChunkSource()
+                .addRegionTicket(TicketType.UNLOAD_COOLDOWN, new ChunkPos(chunkX, chunkZ), 0, Unit.INSTANCE));
+    }
+
     public static ChunkHolder getPlayerChunk(ServerLevel nmsWorld, final int chunkX, final int chunkZ) {
         ChunkMap chunkMap = nmsWorld.getChunkSource().chunkMap;
         try {

worldedit-bukkit/build.gradle.kts

@@ -3,7 +3,7 @@ import io.papermc.paperweight.userdev.attribute.Obfuscation
 
 plugins {
     `java-library`
-    id("com.modrinth.minotaur") version "2.+"
+    id("com.modrinth.minotaur") version "2.7.5"
 }
 
 project.description = "Bukkit"
@@ -32,6 +32,10 @@ repositories {
         name = "OSS Sonatype Snapshots"
         url = uri("https://oss.sonatype.org/content/repositories/snapshots/")
     }
+    maven {
+        name = "Glaremasters"
+        url = uri("https://repo.glaremasters.me/repository/towny/")
+    }
     flatDir { dir(File("src/main/resources")) }
 }
 
@@ -47,7 +51,13 @@ val adapters = configurations.create("adapters") {
     isCanBeResolved = true
     shouldResolveConsistentlyWith(configurations["runtimeClasspath"])
     attributes {
-        attribute(Obfuscation.OBFUSCATION_ATTRIBUTE, objects.named(Obfuscation.OBFUSCATED))
+        attribute(Obfuscation.OBFUSCATION_ATTRIBUTE,
+                if ((project.findProperty("enginehub.obf.none") as String?).toBoolean()) {
+                    objects.named(Obfuscation.NONE)
+                } else {
+                    objects.named(Obfuscation.OBFUSCATED)
+                }
+        )
     }
 }
 

worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/adapter/BukkitQueueHandler.java

@@ -3,8 +3,6 @@ package com.fastasyncworldedit.bukkit.adapter;
 import co.aikar.timings.Timings;
 import com.fastasyncworldedit.bukkit.listener.ChunkListener;
 import com.fastasyncworldedit.core.queue.implementation.QueueHandler;
-import com.sk89q.worldedit.internal.util.LogManagerCompat;
-import org.apache.logging.log4j.Logger;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
@@ -31,7 +29,7 @@ public class BukkitQueueHandler extends QueueHandler {
     }
 
     @Override
-    public void startSet(boolean parallel) {
+    public void startUnsafe(boolean parallel) {
         ChunkListener.physicsFreeze = true;
         if (parallel) {
             try {
@@ -51,7 +49,7 @@ public class BukkitQueueHandler extends QueueHandler {
     }
 
     @Override
-    public void endSet(boolean parallel) {
+    public void endUnsafe(boolean parallel) {
         ChunkListener.physicsFreeze = false;
         if (parallel) {
             try {

worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/adapter/Regenerator.java

@@ -165,7 +165,11 @@ public abstract class Regenerator<IChunkAccess, ProtoChunk extends IChunkAccess,
                     .setNameFormat("fawe-regen-%d")
                     .build()
             );
-        } // else using sequential chunk generation, concurrent not supported
+        } else { // else using sequential chunk generation, concurrent not supported
+            executor = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder()
+                    .setNameFormat("fawe-regen-%d")
+                    .build());
+        }
 
         //TODO: can we get that required radius down without affecting chunk generation (e.g. strucures, features, ...)?
         //for now it is working well and fast, if we are bored in the future we could do the research (a lot of it) to reduce the border radius
@@ -253,10 +257,13 @@ public abstract class Regenerator<IChunkAccess, ProtoChunk extends IChunkAccess,
                     e.printStackTrace();
                 }
             } else { // Concurrency.NONE or generateConcurrent == false
-                // run sequential
-                for (long xz : coords) {
-                    chunkStatus.processChunkSave(xz, worldlimits.get(radius).get(xz));
-                }
+                // run sequential but submit to different thread
+                // running regen on the main thread otherwise triggers async-only events on the main thread
+                executor.submit(() -> {
+                    for (long xz : coords) {
+                        chunkStatus.processChunkSave(xz, worldlimits.get(radius).get(xz));
+                    }
+                }).get(); // wait until finished this step
             }
         }
 

worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/listener/ChunkListener.java

@@ -371,48 +371,6 @@ public abstract class ChunkListener implements Listener {
         }
     }
 
-    /**
-     * Prevent firework from loading chunks.
-     */
-    @EventHandler(priority = EventPriority.LOWEST)
-    public void onChunkLoad(ChunkLoadEvent event) {
-        if (!Settings.settings().TICK_LIMITER.FIREWORKS_LOAD_CHUNKS) {
-            Chunk chunk = event.getChunk();
-            Entity[] entities = chunk.getEntities();
-            World world = chunk.getWorld();
-
-            Exception e = new Exception();
-            int start = 14;
-            int end = 22;
-            int depth = Math.min(end, getDepth(e));
-
-            for (int frame = start; frame < depth; frame++) {
-                StackTraceElement elem = getElement(e, frame);
-                if (elem == null) {
-                    return;
-                }
-                String className = elem.getClassName();
-                int len = className.length();
-                if (len > 15 && className.charAt(len - 15) == 'E' && className
-                        .endsWith("EntityFireworks")) {
-                    for (Entity ent : world.getEntities()) {
-                        if (ent.getType() == EntityType.FIREWORK) {
-                            Vector velocity = ent.getVelocity();
-                            double vertical = Math.abs(velocity.getY());
-                            if (Math.abs(velocity.getX()) > vertical
-                                    || Math.abs(velocity.getZ()) > vertical) {
-                                LOGGER.warn(
-                                        "[FAWE `tick-limiter`] Detected and cancelled rogue FireWork at {}",
-                                        ent.getLocation());
-                                ent.remove();
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
     @EventHandler(priority = EventPriority.LOWEST)
     public void onItemSpawn(ItemSpawnEvent event) {
         if (physicsFreeze) {

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/WorldEditPlugin.java

@@ -112,11 +112,15 @@ public class WorldEditPlugin extends JavaPlugin {
     private BukkitServerInterface platform;
     private BukkitConfiguration config;
     private BukkitPermissionAttachmentManager permissionAttachmentManager;
+    // Fawe start
+    private BukkitCommandSender bukkitConsoleCommandSender;
+    // Fawe end
 
     @Override
     public void onLoad() {
 
         //FAWE start
+        this.bukkitConsoleCommandSender = new BukkitCommandSender(this, Bukkit.getConsoleSender());
         // This is already covered by Spigot, however, a more pesky warning with a proper explanation over "Ambiguous plugin name..." can't hurt.
         Plugin[] plugins = Bukkit.getServer().getPluginManager().getPlugins();
         for (Plugin p : plugins) {
@@ -594,7 +598,7 @@ public class WorldEditPlugin extends JavaPlugin {
             return new BukkitBlockCommandSender(this, (BlockCommandSender) sender);
         }
 
-        return new BukkitCommandSender(this, sender);
+        return bukkitConsoleCommandSender;
     }
 
     public BukkitServerInterface getInternalPlatform() {

worldedit-cli/src/main/java/com/sk89q/worldedit/cli/CLIExtraCommands.java

@@ -23,6 +23,7 @@ import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.regions.selector.CuboidRegionSelector;
+import com.sk89q.worldedit.regions.selector.ExtendingCuboidRegionSelector;
 import com.sk89q.worldedit.util.formatting.text.TextComponent;
 import com.sk89q.worldedit.util.task.Task;
 import com.sk89q.worldedit.world.World;
@@ -39,9 +40,12 @@ public class CLIExtraCommands {
             desc = "Select the entire world"
     )
     public void selectWorld(Actor actor, World world, LocalSession session) {
-        session.setRegionSelector(world, new CuboidRegionSelector(
-                world, world.getMinimumPoint(), world.getMaximumPoint()
-        ));
+        final CuboidRegionSelector selector;
+        if (session.getRegionSelector(world) instanceof ExtendingCuboidRegionSelector) {
+            selector = new ExtendingCuboidRegionSelector(world, world.getMinimumPoint(), world.getMaximumPoint());
+        } else {
+            selector = new CuboidRegionSelector(world, world.getMinimumPoint(), world.getMaximumPoint());
+        }
         actor.printInfo(TextComponent.of("Selected the entire world."));
     }
 

worldedit-core/doctools/build.gradle.kts

@@ -1,14 +1,14 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-    kotlin("jvm") version "1.5.30"
+    kotlin("jvm") version "1.8.20"
     application
 }
 
 applyCommonConfiguration()
 
 tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = "11"
+    kotlinOptions.jvmTarget = "17"
 }
 
 application.mainClass.set("com.sk89q.worldedit.internal.util.DocumentationPrinter")

worldedit-core/src/main/java/com/fastasyncworldedit/core/Fawe.java

@@ -12,7 +12,9 @@ import com.fastasyncworldedit.core.util.RandomTextureUtil;
 import com.fastasyncworldedit.core.util.TaskManager;
 import com.fastasyncworldedit.core.util.TextureUtil;
 import com.fastasyncworldedit.core.util.WEManager;
+import com.fastasyncworldedit.core.util.task.KeyQueuedExecutorService;
 import com.github.luben.zstd.Zstd;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.internal.util.LogManagerCompat;
 import net.jpountz.lz4.LZ4Factory;
@@ -33,6 +35,9 @@ import java.lang.management.MemoryPoolMXBean;
 import java.lang.management.MemoryUsage;
 import java.util.Date;
 import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -86,6 +91,7 @@ public class Fawe {
      * The platform specific implementation.
      */
     private final IFawe implementation;
+    private final KeyQueuedExecutorService<UUID> clipboardExecutor;
     private FaweVersion version;
     private TextureUtil textures;
     private QueueHandler queueHandler;
@@ -131,6 +137,15 @@ public class Fawe {
         }, 0);
 
         TaskManager.taskManager().repeat(timer, 1);
+
+        clipboardExecutor = new KeyQueuedExecutorService<>(new ThreadPoolExecutor(
+                1,
+                Settings.settings().QUEUE.PARALLEL_THREADS,
+                0L,
+                TimeUnit.MILLISECONDS,
+                new LinkedBlockingQueue<>(),
+                new ThreadFactoryBuilder().setNameFormat("fawe-clipboard-%d").build()
+        ));
     }
 
     /**
@@ -339,9 +354,10 @@ public class Fawe {
                 Settings.settings().QUEUE.TARGET_SIZE,
                 Settings.settings().QUEUE.PARALLEL_THREADS
         );
-        if (Settings.settings().QUEUE.TARGET_SIZE < 2 * Settings.settings().QUEUE.PARALLEL_THREADS) {
+        if (Settings.settings().QUEUE.TARGET_SIZE < 4 * Settings.settings().QUEUE.PARALLEL_THREADS) {
             LOGGER.error(
-                    "queue.target_size is {}, and queue.parallel_threads is {}. It is HIGHLY recommended that queue" + ".target_size be at least twice queue.parallel_threads or higher.",
+                    "queue.target_size is {}, and queue.parallel_threads is {}. It is HIGHLY recommended that queue" +
+                            ".target_size be at least four times queue.parallel_threads or greater.",
                     Settings.settings().QUEUE.TARGET_SIZE,
                     Settings.settings().QUEUE.PARALLEL_THREADS
             );
@@ -427,4 +443,15 @@ public class Fawe {
         return this.thread = Thread.currentThread();
     }
 
+    /**
+     * Gets the executor used for clipboard IO if clipboard on disk is enabled or null
+     *
+     * @return Executor used for clipboard IO if clipboard on disk is enabled or null
+     * @since 2.6.2
+     */
+    @Nullable
+    public KeyQueuedExecutorService<UUID> getClipboardExecutor() {
+        return this.clipboardExecutor;
+    }
+
 }

worldedit-core/src/main/java/com/fastasyncworldedit/core/command/SuggestInputParseException.java

@@ -1,6 +1,8 @@
 package com.fastasyncworldedit.core.command;
 
+import com.fastasyncworldedit.core.configuration.Caption;
 import com.sk89q.worldedit.extension.input.InputParseException;
+import com.sk89q.worldedit.util.formatting.text.Component;
 
 import java.lang.reflect.InvocationTargetException;
 import java.util.List;
@@ -13,33 +15,81 @@ public class SuggestInputParseException extends InputParseException {
 
     private final InputParseException cause;
     private final Supplier<List<String>> getSuggestions;
-    private String prefix;
 
+    /**
+     * @deprecated Use {@link SuggestInputParseException#SuggestInputParseException(Component, Supplier)}
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public SuggestInputParseException(String msg, String prefix, Supplier<List<String>> getSuggestions) {
-        this(new InputParseException(msg), prefix, getSuggestions);
+        this(new InputParseException(msg), getSuggestions);
     }
 
+    /**
+     * @deprecated Use {@link SuggestInputParseException#of(Throwable, Supplier)}
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public static SuggestInputParseException of(Throwable other, String prefix, Supplier<List<String>> getSuggestions) {
         if (other instanceof InputParseException) {
-            return of((InputParseException) other, prefix, getSuggestions);
+            return of((InputParseException) other, getSuggestions);
         }
-        return of(new InputParseException(other.getMessage()), prefix, getSuggestions);
+        return of(new InputParseException(other.getMessage()), getSuggestions);
     }
 
+    /**
+     * @deprecated Use {@link SuggestInputParseException#of(InputParseException, Supplier)}
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public static SuggestInputParseException of(InputParseException other, String prefix, Supplier<List<String>> getSuggestions) {
         if (other instanceof SuggestInputParseException) {
             return (SuggestInputParseException) other;
         }
-        return new SuggestInputParseException(other, prefix, getSuggestions);
+        return new SuggestInputParseException(other, getSuggestions);
     }
 
+    /**
+     * @deprecated Use {@link SuggestInputParseException#SuggestInputParseException(InputParseException, Supplier)}
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public SuggestInputParseException(InputParseException other, String prefix, Supplier<List<String>> getSuggestions) {
-        super(other.getMessage());
+        super(other.getRichMessage());
+        checkNotNull(getSuggestions);
+        checkNotNull(other);
+        this.cause = other;
+        this.getSuggestions = getSuggestions;
+    }
+
+    /**
+     * Create a new SuggestInputParseException instance
+     *
+     * @param message        Message to send
+     * @param getSuggestions Supplier of list of suggestions to give to user
+     * @since 2.6.2
+     */
+    public SuggestInputParseException(Component message, Supplier<List<String>> getSuggestions) {
+        this(new InputParseException(message), getSuggestions);
+    }
+
+    public static SuggestInputParseException of(Throwable other, Supplier<List<String>> getSuggestions) {
+        if (other instanceof InputParseException) {
+            return of((InputParseException) other, getSuggestions);
+        }
+        //noinspection deprecation
+        return of(new InputParseException(other.getMessage()), getSuggestions);
+    }
+
+    public static SuggestInputParseException of(InputParseException other, Supplier<List<String>> getSuggestions) {
+        if (other instanceof SuggestInputParseException) {
+            return (SuggestInputParseException) other;
+        }
+        return new SuggestInputParseException(other, getSuggestions);
+    }
+
+    public SuggestInputParseException(InputParseException other, Supplier<List<String>> getSuggestions) {
+        super(other.getRichMessage());
         checkNotNull(getSuggestions);
         checkNotNull(other);
         this.cause = other;
         this.getSuggestions = getSuggestions;
-        this.prefix = prefix;
     }
 
     public static SuggestInputParseException get(InvocationTargetException e) {
@@ -54,7 +104,7 @@ public class SuggestInputParseException extends InputParseException {
     }
 
     public static SuggestInputParseException of(String input, List<Object> values) {
-        throw new SuggestInputParseException("No value: " + input, input, () ->
+        throw new SuggestInputParseException(Caption.of("fawe.error.no-value-for-input", input), () ->
                 values.stream()
                         .map(Object::toString)
                         .filter(v -> v.startsWith(input))
@@ -76,8 +126,12 @@ public class SuggestInputParseException extends InputParseException {
         return getSuggestions.get();
     }
 
+    /**
+     * @deprecated Unused
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public SuggestInputParseException prepend(String input) {
-        this.prefix = input + prefix;
+        // Do nothing
         return this;
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/configuration/Settings.java

@@ -102,11 +102,10 @@ public class Settings extends Config {
 
     public FaweLimit getLimit(Actor actor) {
         FaweLimit limit;
-        if (actor.hasPermission("fawe.limit.*") || actor.hasPermission("fawe.bypass")) {
-            limit = FaweLimit.MAX.copy();
-        } else {
-            limit = new FaweLimit();
+        if (actor.hasPermission("fawe.bypass") || actor.hasPermission("fawe.limit.unlimited")) {
+            return FaweLimit.MAX.copy();
         }
+        limit = new FaweLimit();
         ArrayList<String> keys = new ArrayList<>(LIMITS.getSections());
         if (keys.remove("default")) {
             keys.add("default");
@@ -394,6 +393,7 @@ public class Settings extends Config {
                 "Where block properties are specified, any blockstate with the property will be disallowed (e.g. all directions",
                 "of a waterlogged fence). For blocking/remapping of all occurrences of a property like waterlogged, see",
                 "remap-properties below.",
+                "To generate a blank list, substitute the default content with a set of square brackets [] instead.",
                 "Example block property blocking:",
                 " - \"minecraft:conduit[waterlogged=true]\"",
                 " - \"minecraft:piston[extended=false,facing=west]\"",
@@ -520,10 +520,10 @@ public class Settings extends Config {
                 " - A smaller value will reduce memory usage",
                 " - A value too small may break some operations (deform?)",
                 " - Values smaller than the configurated parallel-threads are not accepted",
-                " - It is recommended this option be at least 2x greater than parallel-threads"
+                " - It is recommended this option be at least 4x greater than parallel-threads"
 
         })
-        public int TARGET_SIZE = 64;
+        public int TARGET_SIZE = 8 * Runtime.getRuntime().availableProcessors();
         @Comment({
                 "Force FAWE to start placing chunks regardless of whether an edit is finished processing",
                 " - A larger value will use slightly less CPU time",
@@ -671,6 +671,14 @@ public class Settings extends Config {
         })
         public int MAX_IMAGE_SIZE = 8294400;
 
+        @Comment({
+                "Whitelist of hostnames to allow images to be downloaded from",
+                " - Adding '*' to the list will allow any host, but this is NOT adviseable",
+                " - Crash exploits exist with malformed images",
+                " - See: https://medium.com/chargebee-engineering/perils-of-parsing-pixel-flood-attack-on-java-imageio-a97aeb06637d"
+        })
+        public List<String> ALLOWED_IMAGE_HOSTS = new ArrayList<>(Collections.singleton(("i.imgur.com")));
+
     }
 
     public static class EXTENT {
@@ -694,7 +702,7 @@ public class Settings extends Config {
     public static class TICK_LIMITER {
 
         @Comment("Enable the limiter")
-        public boolean ENABLED = true;
+        public boolean ENABLED = false;
         @Comment("The interval in ticks")
         public int INTERVAL = 20;
         @Comment("Max falling blocks per interval (per chunk)")
@@ -703,12 +711,6 @@ public class Settings extends Config {
         public int PHYSICS_MS = 10;
         @Comment("Max item spawns per interval (per chunk)")
         public int ITEMS = 256;
-        @Comment({
-                "Whether fireworks can load chunks",
-                " - Fireworks usually travel vertically so do not load any chunks",
-                " - Horizontal fireworks can be hacked in to crash a server"
-        })
-        public boolean FIREWORKS_LOAD_CHUNKS = false;
 
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/extension/factory/parser/mask/RichMaskParser.java

@@ -50,7 +50,7 @@ public class RichMaskParser extends FaweParser<Mask> {
     @Override
     public Mask parseFromInput(String input, ParserContext context) throws InputParseException {
         if (input.isEmpty()) {
-            throw new SuggestInputParseException("No input provided", "", () -> Stream
+            throw new SuggestInputParseException(Caption.of("fawe.error.no-input-provided"), () -> Stream
                     .of("#", ",", "&")
                     .map(n -> n + ":")
                     .collect(Collectors.toList())
@@ -95,7 +95,6 @@ public class RichMaskParser extends FaweParser<Mask> {
                                                         "https://intellectualsites.github.io/fastasyncworldedit-documentation/patterns/patterns"
                                                 ))
                                 )),
-                                full,
                                 () -> {
                                     if (full.length() == 1) {
                                         return new ArrayList<>(worldEdit.getMaskFactory().getSuggestions(""));
@@ -148,6 +147,7 @@ public class RichMaskParser extends FaweParser<Mask> {
                             try {
                                 builder.addRegex(full);
                             } catch (InputParseException ignored) {
+                                builder.clear();
                                 context.setPreferringWildcard(false);
                                 context.setRestricted(false);
                                 BaseBlock block = worldEdit.getBlockFactory().parseFromInput(full, context);
@@ -162,7 +162,6 @@ public class RichMaskParser extends FaweParser<Mask> {
                                                                 "https://intellectualsites.github.io/fastasyncworldedit-documentation/masks/masks"
                                                         ))
                                         )),
-                                        full,
                                         () -> {
                                             if (full.length() == 1) {
                                                 return new ArrayList<>(worldEdit.getMaskFactory().getSuggestions(""));

worldedit-core/src/main/java/com/fastasyncworldedit/core/extension/factory/parser/pattern/RichPatternParser.java

@@ -47,8 +47,7 @@ public class RichPatternParser extends FaweParser<Pattern> {
     public Pattern parseFromInput(String input, ParserContext context) throws InputParseException {
         if (input.isEmpty()) {
             throw new SuggestInputParseException(
-                    "No input provided",
-                    "",
+                    Caption.of("fawe.error.no-input-provided"),
                     () -> Stream
                             .concat(Stream.of("#", ",", "&"), BlockTypes.getNameSpaces().stream().map(n -> n + ":"))
                             .collect(Collectors.toList())
@@ -88,7 +87,6 @@ public class RichPatternParser extends FaweParser<Pattern> {
                                                                 "https://intellectualsites.github.io/fastasyncworldedit-documentation/patterns/patterns"
                                                         ))
                                 )),
-                                full,
                                 () -> {
                                     if (full.length() == 1) {
                                         return new ArrayList<>(worldEdit.getPatternFactory().getSuggestions(""));

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/DisallowedBlocksExtent.java

@@ -141,7 +141,7 @@ public class DisallowedBlocksExtent extends AbstractDelegateExtent implements IB
                 BlockState state = BlockTypesCache.states[block];
                 if (blockedBlocks != null) {
                     if (blockedBlocks.contains(state.getBlockType().getId())) {
-                        blocks[i] = 0;
+                        blocks[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
                         continue;
                     }
                 }
@@ -150,7 +150,7 @@ public class DisallowedBlocksExtent extends AbstractDelegateExtent implements IB
                 }
                 for (FuzzyBlockState fuzzy : blockedStates) {
                     if (fuzzy.equalsFuzzy(state)) {
-                        blocks[i] = 0;
+                        blocks[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
                         continue it;
                     }
                 }
@@ -178,7 +178,7 @@ public class DisallowedBlocksExtent extends AbstractDelegateExtent implements IB
 
     @Override
     public ProcessorScope getScope() {
-        return ProcessorScope.CHANGING_BLOCKS;
+        return ProcessorScope.REMOVING_BLOCKS;
     }
 
 }

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/FaweRegionExtent.java

@@ -168,7 +168,7 @@ public abstract class FaweRegionExtent extends ResettableExtent implements IBatc
 
     @Override
     public ProcessorScope getScope() {
-        return ProcessorScope.READING_SET_BLOCKS;
+        return ProcessorScope.REMOVING_BLOCKS;
     }
 
 }

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/MultiRegionExtent.java

@@ -172,7 +172,7 @@ public class MultiRegionExtent extends FaweRegionExtent {
             set = intersection.processSet(chunk, get, set);
         }
         if (disallowedIntersection != null) {
-            intersection.processSet(chunk, get, set);
+            set = disallowedIntersection.processSet(chunk, get, set, true);
         }
         return set;
     }

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/CPUOptimizedClipboard.java

@@ -11,6 +11,7 @@ import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 import java.io.IOException;
 import java.util.Collection;
@@ -191,8 +192,8 @@ public class CPUOptimizedClipboard extends LinearClipboard {
     @Override
     public <B extends BlockStateHolder<B>> boolean setBlock(int index, B block) {
         char ordinal = block.getOrdinalChar();
-        if (ordinal == 0) {
-            ordinal = 1;
+        if (ordinal == BlockTypesCache.ReservedIDs.__RESERVED__) {
+            ordinal = BlockTypesCache.ReservedIDs.AIR;
         }
         states[index] = ordinal;
         boolean hasNbt = block instanceof BaseBlock && block.hasNbtData();

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/DiskOptimizedClipboard.java

@@ -26,6 +26,7 @@ import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.block.BlockTypes;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 import org.apache.logging.log4j.Logger;
 
 import java.io.ByteArrayOutputStream;
@@ -155,7 +156,9 @@ public class DiskOptimizedClipboard extends LinearClipboard {
     /**
      * Load an existing file as a DiskOptimizedClipboard. The file MUST exist and MUST be created as a DiskOptimizedClipboard
      * with data written to it.
+     * @deprecated Will be made private, use {@link DiskOptimizedClipboard#loadFromFile(File)}
      */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public DiskOptimizedClipboard(File file) {
         this(file, VERSION);
     }
@@ -166,14 +169,15 @@ public class DiskOptimizedClipboard extends LinearClipboard {
      *
      * @param file            File to read from
      * @param versionOverride An override version to allow loading of older clipboards if required
+     * @deprecated Will be made private, use {@link DiskOptimizedClipboard#loadFromFile(File)}
      */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public DiskOptimizedClipboard(File file, int versionOverride) {
         super(readSize(file, versionOverride), BlockVector3.ZERO);
         headerSize = getHeaderSizeOverrideFromVersion(versionOverride);
         nbtMap = new HashMap<>();
         try {
             this.file = file;
-            checkFileLength(file);
             this.braf = new RandomAccessFile(file, "rw");
             braf.setLength(file.length());
             this.nbtBytesRemaining = Integer.MAX_VALUE - (int) file.length();
@@ -202,32 +206,6 @@ public class DiskOptimizedClipboard extends LinearClipboard {
         }
     }
 
-    private void checkFileLength(File file) throws IOException {
-        long expectedFileSize = headerSize + ((long) getVolume() << 1);
-        if (file.length() > Integer.MAX_VALUE) {
-            if (expectedFileSize >= Integer.MAX_VALUE) {
-                throw new IOException(String.format(
-                        "Cannot load clipboard of file size: %d > 2147483647 bytes (2.147 GiB), " + "volume: %d blocks",
-                        file.length(),
-                        getVolume()
-                ));
-            } else {
-                throw new IOException(String.format(
-                        "Cannot load clipboard of file size > 2147483647 bytes (2.147 GiB). Possible corrupt file? Mismatch" +
-                                " between volume `%d` and file length `%d`!",
-                        file.length(),
-                        getVolume()
-                ));
-            }
-        } else if (expectedFileSize != file.length()) {
-            throw new IOException(String.format(
-                    "Possible corrupt clipboard file? Mismatch between expected file size `%d` and actual file size `%d`!",
-                    expectedFileSize,
-                    file.length()
-            ));
-        }
-    }
-
     /**
      * Attempt to load a file into a new {@link DiskOptimizedClipboard} instance. Will attempt to recover on version mismatch
      * failure.
@@ -723,8 +701,8 @@ public class DiskOptimizedClipboard extends LinearClipboard {
         try {
             int index = headerSize + (getIndex(x, y, z) << 1);
             char ordinal = block.getOrdinalChar();
-            if (ordinal == 0) {
-                ordinal = 1;
+            if (ordinal == BlockTypesCache.ReservedIDs.__RESERVED__) {
+                ordinal = BlockTypesCache.ReservedIDs.AIR;
             }
             byteBuffer.putChar(index, ordinal);
             boolean hasNbt = block instanceof BaseBlock && block.hasNbtData();

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/MemoryOptimizedClipboard.java

@@ -16,6 +16,7 @@ import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.block.BlockTypes;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 import java.io.IOException;
 import java.util.Collection;
@@ -269,8 +270,8 @@ public class MemoryOptimizedClipboard extends LinearClipboard {
     @Override
     public <B extends BlockStateHolder<B>> boolean setBlock(int index, B block) {
         int ordinal = block.getOrdinal();
-        if (ordinal == 0) {
-            ordinal = 1;
+        if (ordinal == BlockTypesCache.ReservedIDs.__RESERVED__) {
+            ordinal = BlockTypesCache.ReservedIDs.AIR;
         }
         setOrdinal(index, ordinal);
         boolean hasNbt = block instanceof BaseBlock && block.hasNbtData();

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/io/FastSchematicWriter.java

@@ -172,8 +172,8 @@ public class FastSchematicWriter implements ClipboardWriter {
                 }
 
                 int ordinal = block.getOrdinal();
-                if (ordinal == 0) {
-                    ordinal = 1;
+                if (ordinal == BlockTypesCache.ReservedIDs.__RESERVED__) {
+                    ordinal = BlockTypesCache.ReservedIDs.AIR;
                 }
                 char value = palette[ordinal];
                 if (value == Character.MAX_VALUE) {

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/filter/DistrFilter.java

@@ -41,8 +41,8 @@ public class DistrFilter extends ForkedFilter<DistrFilter> {
     @Override
     public final void applyBlock(FilterBlock block) {
         int ordinal = block.getOrdinal();
-        if (ordinal == 0) {
-            ordinal = 1;
+        if (ordinal == BlockTypesCache.ReservedIDs.__RESERVED__) {
+            ordinal = BlockTypesCache.ReservedIDs.AIR;
         }
         counter[ordinal]++;
     }

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/processor/MultiBatchProcessor.java

@@ -257,7 +257,7 @@ public class MultiBatchProcessor implements IBatchProcessor {
         for (IBatchProcessor processor : processors) {
             scope = Math.max(scope, processor.getScope().intValue());
         }
-        return ProcessorScope.valueOf(0);
+        return ProcessorScope.valueOf(scope);
     }
 
     /**

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/processor/ProcessorScope.java

@@ -3,9 +3,9 @@ package com.fastasyncworldedit.core.extent.processor;
 /**
  * The scope of a processor.
  * Order in which processors are executed:
- * - ADDING_BLOCKS (processors that strictly ADD blocks to an edit ONLY)
- * - CHANGING_BLOCKS (processors that strictly ADD or CHANGE blocks being set)
- * - REMOVING_BLOCKS (processors that string ADD, CHANGE or REMOVE blocks being set)
+ * - ADDING_BLOCKS (processors that may ADD blocks to an edit ONLY)
+ * - CHANGING_BLOCKS (processors that may ADD or CHANGE blocks being set)
+ * - REMOVING_BLOCKS (processors that may ADD, CHANGE or REMOVE blocks being set)
  * - CUSTOM (processors that do not specify a SCOPE)
  * - READING_SET_BLOCKS (processors that do not alter blocks at all, and read the blocks that are actually going to set, e.g. history processors)
  */

worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/processor/heightmap/HeightmapProcessor.java

@@ -73,11 +73,11 @@ public class HeightmapProcessor implements IBatchProcessor {
             for (int y = 15; y >= 0; y--) {
                 // We don't need to actually iterate over x and z as we're both reading and writing an index
                 for (int j = 0; j < BLOCKS_PER_Y; j++) {
-                    char ordinal = 0;
+                    char ordinal = BlockTypesCache.ReservedIDs.__RESERVED__;
                     if (hasSectionSet) {
                         ordinal = setSection[index(y, j)];
                     }
-                    if (ordinal == 0) {
+                    if (ordinal == BlockTypesCache.ReservedIDs.__RESERVED__) {
                         if (!hasSectionGet) {
                             if (!hasSectionSet) {
                                 continue layer;

worldedit-core/src/main/java/com/fastasyncworldedit/core/function/mask/BlockMaskBuilder.java

@@ -178,8 +178,7 @@ public class BlockMaskBuilder {
                             }
                             if (operator == null) {
                                 throw new SuggestInputParseException(
-                                        "No operator for " + input,
-                                        "",
+                                        Caption.of("fawe.error.no-operator-for-input", input),
                                         () -> Arrays.asList("=", "~", "!", "<", ">", "<=", ">=")
                                 );
                             }
@@ -195,7 +194,7 @@ public class BlockMaskBuilder {
                                 String value = charSequence.toString();
                                 final PropertyKey fKey = key;
                                 Collection<BlockType> types = type != null ? Collections.singleton(type) : blockTypeList;
-                                throw new SuggestInputParseException("No value for " + input, input, () -> {
+                                throw new SuggestInputParseException(Caption.of("fawe.error.no-value-for-input", input), () -> {
                                     HashSet<String> values = new HashSet<>();
                                     types.stream().filter(t -> t.hasProperty(fKey)).forEach(t -> {
                                         Property<Object> p = t.getProperty(fKey);
@@ -287,7 +286,7 @@ public class BlockMaskBuilder {
     }
 
     private void suggest(String input, String property, Collection<BlockType> finalTypes) throws InputParseException {
-        throw new SuggestInputParseException(input + " does not have: " + property, input, () -> {
+        throw new SuggestInputParseException(Caption.of("worldedit.error.parser.unknown-property", property, input), () -> {
             Set<PropertyKey> keys = PropertyKeySet.empty();
             finalTypes.forEach(t -> t.getProperties().forEach(p -> keys.add(p.getKey())));
             return keys.stream().map(PropertyKey::getName)

worldedit-core/src/main/java/com/fastasyncworldedit/core/history/change/MutableBiomeChange.java

@@ -5,6 +5,7 @@ import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.history.UndoContext;
 import com.sk89q.worldedit.history.change.Change;
 import com.sk89q.worldedit.world.biome.BiomeTypes;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 public class MutableBiomeChange implements Change {
 
@@ -13,8 +14,8 @@ public class MutableBiomeChange implements Change {
     private int to;
 
     public MutableBiomeChange() {
-        this.from = 0;
-        this.to = 0;
+        this.from = BlockTypesCache.ReservedIDs.__RESERVED__;
+        this.to = BlockTypesCache.ReservedIDs.__RESERVED__;
     }
 
     public void setBiome(int x, int y, int z, int from, int to) {

worldedit-core/src/main/java/com/fastasyncworldedit/core/history/change/MutableFullBlockChange.java

@@ -6,6 +6,7 @@ import com.sk89q.worldedit.extent.inventory.BlockBagException;
 import com.sk89q.worldedit.history.UndoContext;
 import com.sk89q.worldedit.history.change.Change;
 import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 public class MutableFullBlockChange implements Change {
 
@@ -39,14 +40,14 @@ public class MutableFullBlockChange implements Change {
         if (blockBag != null) {
             BlockState toState = BlockState.getFromOrdinal(to);
             if (fromState != toState) {
-                if (allowFetch && from != 0) {
+                if (allowFetch && from != BlockTypesCache.ReservedIDs.__RESERVED__) {
                     try {
                         blockBag.fetchPlacedBlock(fromState);
                     } catch (BlockBagException e) {
                         return;
                     }
                 }
-                if (allowStore && to != 0) {
+                if (allowStore && to != BlockTypesCache.ReservedIDs.__RESERVED__) {
                     try {
                         blockBag.storeDroppedBlock(toState);
                     } catch (BlockBagException ignored) {

worldedit-core/src/main/java/com/fastasyncworldedit/core/history/changeset/AbstractChangeSet.java

@@ -39,19 +39,27 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.Future;
+import java.util.concurrent.Semaphore;
 import java.util.concurrent.atomic.AtomicInteger;
 
+/**
+ * This batch processor writes changes to a concrete implementation.
+ * {@link #processSet(IChunk, IChunkGet, IChunkSet)} is synchronized to guarantee consistency.
+ * To avoid many blocking threads on this method, changes are enqueued in {@link #queue}.
+ * This allows to keep other threads free for other work.
+ */
 public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
 
     private static final Logger LOGGER = LogManagerCompat.getLogger();
 
     private final World world;
     private final AtomicInteger lastException = new AtomicInteger();
-    protected AtomicInteger waitingCombined = new AtomicInteger(0);
-    protected AtomicInteger waitingAsync = new AtomicInteger(0);
-
-    protected boolean closed;
+    private final Semaphore workerSemaphore = new Semaphore(1, false);
+    private final ConcurrentLinkedQueue<Runnable> queue = new ConcurrentLinkedQueue<>();
+    protected volatile boolean closed;
 
     public AbstractChangeSet(World world) {
         this.world = world;
@@ -65,16 +73,11 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
         if (closed) {
             return;
         }
-        waitingAsync.incrementAndGet();
         TaskManager.taskManager().async(() -> {
-            waitingAsync.decrementAndGet();
-            synchronized (waitingAsync) {
-                waitingAsync.notifyAll();
-            }
             try {
                 close();
             } catch (IOException e) {
-                e.printStackTrace();
+                LOGGER.catching(e);
             }
         });
     }
@@ -82,20 +85,10 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
     @Override
     public void flush() {
         try {
-            if (!Fawe.isMainThread()) {
-                while (waitingAsync.get() > 0) {
-                    synchronized (waitingAsync) {
-                        waitingAsync.wait(1000);
-                    }
-                }
-            }
-            while (waitingCombined.get() > 0) {
-                synchronized (waitingCombined) {
-                    waitingCombined.wait(1000);
-                }
-            }
-        } catch (InterruptedException e) {
-            e.printStackTrace();
+            // drain with this thread too
+            drainQueue(true);
+        } catch (Exception e) {
+            LOGGER.catching(e);
         }
     }
 
@@ -125,7 +118,7 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
     }
 
     @Override
-    public synchronized IChunkSet processSet(IChunk chunk, IChunkGet get, IChunkSet set) {
+    public final synchronized IChunkSet processSet(IChunk chunk, IChunkGet get, IChunkSet set) {
         int bx = chunk.getX() << 4;
         int bz = chunk.getZ() << 4;
 
@@ -193,7 +186,7 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
                         }
                         final int combinedFrom = from;
                         final int combinedTo = blocksSet[index];
-                        if (combinedTo != 0) {
+                        if (combinedTo != BlockTypesCache.ReservedIDs.__RESERVED__) {
                             add(xx, yy, zz, combinedFrom, combinedTo);
                         }
                     }
@@ -306,12 +299,12 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
             BaseBlock to = change.getCurrent();
             add(loc, from, to);
         } catch (Exception e) {
-            e.printStackTrace();
+            LOGGER.catching(e);
         }
     }
 
     public boolean isEmpty() {
-        return waitingCombined.get() == 0 && waitingAsync.get() == 0 && size() == 0;
+        return queue.isEmpty() && workerSemaphore.availablePermits() == 1 && size() == 0;
     }
 
     public void add(BlockVector3 loc, BaseBlock from, BaseBlock to) {
@@ -353,7 +346,7 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
             add(x, y, z, combinedFrom, combinedTo);
 
         } catch (Exception e) {
-            e.printStackTrace();
+            LOGGER.catching(e);
         }
     }
 
@@ -362,7 +355,6 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
     }
 
     public Future<?> addWriteTask(final Runnable writeTask, final boolean completeNow) {
-        AbstractChangeSet.this.waitingCombined.incrementAndGet();
         Runnable wrappedTask = () -> {
             try {
                 writeTask.run();
@@ -372,25 +364,55 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
                 } else {
                     int hash = t.getMessage().hashCode();
                     if (lastException.getAndSet(hash) != hash) {
-                        t.printStackTrace();
-                    }
-                }
-            } finally {
-                if (AbstractChangeSet.this.waitingCombined.decrementAndGet() <= 0) {
-                    synchronized (AbstractChangeSet.this.waitingAsync) {
-                        AbstractChangeSet.this.waitingAsync.notifyAll();
-                    }
-                    synchronized (AbstractChangeSet.this.waitingCombined) {
-                        AbstractChangeSet.this.waitingCombined.notifyAll();
+                        LOGGER.catching(t);
                     }
                 }
             }
         };
         if (completeNow) {
             wrappedTask.run();
-            return Futures.immediateCancelledFuture();
+            return Futures.immediateVoidFuture();
         } else {
-            return Fawe.instance().getQueueHandler().submit(wrappedTask);
+            CompletableFuture<?> task = new CompletableFuture<>();
+            queue.add(() -> {
+                wrappedTask.run();
+                task.complete(null);
+            });
+            // make sure changes are processed
+            triggerWorker();
+            return task;
+        }
+    }
+
+    private void triggerWorker() {
+        if (workerSemaphore.availablePermits() == 0) {
+            return; // fast path to avoid additional tasks: a worker is already draining the queue
+        }
+        // create a new worker to drain the current queue
+        Fawe.instance().getQueueHandler().async(() -> drainQueue(false));
+    }
+
+    private void drainQueue(boolean ignoreRunningState) {
+        if (!workerSemaphore.tryAcquire()) {
+            if (ignoreRunningState) {
+                // ignoreRunningState means we want to block
+                // even if another thread is already draining
+                try {
+                    workerSemaphore.acquire();
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                }
+            } else {
+                return; // another thread is draining the queue already, ignore
+            }
+        }
+        try {
+            Runnable next;
+            while ((next = queue.poll()) != null) { // process all tasks in the queue
+                next.run();
+            }
+        } finally {
+            workerSemaphore.release();
         }
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/history/changeset/AbstractDelegateChangeSet.java

@@ -25,8 +25,6 @@ public class AbstractDelegateChangeSet extends AbstractChangeSet {
     public AbstractDelegateChangeSet(AbstractChangeSet parent) {
         super(parent.getWorld());
         this.parent = parent;
-        this.waitingCombined = parent.waitingCombined;
-        this.waitingAsync = parent.waitingAsync;
     }
 
     public final AbstractChangeSet getParent() {

worldedit-core/src/main/java/com/fastasyncworldedit/core/history/changeset/FaweStreamChangeSet.java

@@ -258,7 +258,7 @@ public abstract class FaweStreamChangeSet extends AbstractChangeSet {
         if (blockSize > 0) {
             return false;
         }
-        if (waitingCombined.get() != 0 || waitingAsync.get() != 0) {
+        if (!super.isEmpty()) {
             return false;
         }
         flush();

worldedit-core/src/main/java/com/fastasyncworldedit/core/limit/FaweLimit.java

@@ -2,6 +2,7 @@ package com.fastasyncworldedit.core.limit;
 
 import com.fastasyncworldedit.core.FaweCache;
 
+import java.util.Collections;
 import java.util.Set;
 
 public class FaweLimit {
@@ -114,10 +115,10 @@ public class FaweLimit {
         MAX.FAST_PLACEMENT = true;
         MAX.CONFIRM_LARGE = true;
         MAX.RESTRICT_HISTORY_TO_REGIONS = false;
-        MAX.STRIP_NBT = null;
+        MAX.STRIP_NBT = Collections.emptySet();
         MAX.UNIVERSAL_DISALLOWED_BLOCKS = false;
-        MAX.DISALLOWED_BLOCKS = null;
-        MAX.REMAP_PROPERTIES = null;
+        MAX.DISALLOWED_BLOCKS = Collections.emptySet();
+        MAX.REMAP_PROPERTIES = Collections.emptySet();
     }
 
     public boolean MAX_CHANGES() {
@@ -241,7 +242,7 @@ public class FaweLimit {
                 && FAST_PLACEMENT
                 && !RESTRICT_HISTORY_TO_REGIONS
                 && (STRIP_NBT == null || STRIP_NBT.isEmpty())
-                && !UNIVERSAL_DISALLOWED_BLOCKS
+                // && !UNIVERSAL_DISALLOWED_BLOCKS --> do not include this, it effectively has no relevance
                 && (DISALLOWED_BLOCKS == null || DISALLOWED_BLOCKS.isEmpty())
                 && (REMAP_PROPERTIES == null || REMAP_PROPERTIES.isEmpty());
     }

worldedit-core/src/main/java/com/fastasyncworldedit/core/math/BlockVector3ChunkMap.java

@@ -9,7 +9,20 @@ import java.util.Map;
 
 public class BlockVector3ChunkMap<T> implements IAdaptedMap<BlockVector3, T, Integer, T> {
 
-    private final Int2ObjectArrayMap<T> map = new Int2ObjectArrayMap<>();
+    private final Int2ObjectArrayMap<T> map;
+
+    public BlockVector3ChunkMap() {
+        map = new Int2ObjectArrayMap<>();
+    }
+
+    /**
+     * Create a new instance that is a copy of an existing map
+     *
+     * @param map existing map to copy
+     */
+    public BlockVector3ChunkMap(BlockVector3ChunkMap<T> map) {
+        this.map = new Int2ObjectArrayMap<>(map.getParent());
+    }
 
     @Override
     public Map<Integer, T> getParent() {

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/IBatchProcessor.java

@@ -7,6 +7,7 @@ import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 import javax.annotation.Nullable;
 import java.util.Map;
@@ -71,7 +72,7 @@ public interface IBatchProcessor {
                         if (arr != null) {
                             int index = (minY & 15) << 8;
                             for (int i = 0; i < index; i++) {
-                                arr[i] = 0;
+                                arr[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         } else {
                             arr = new char[4096];
@@ -89,7 +90,7 @@ public interface IBatchProcessor {
                         if (arr != null) {
                             int index = ((maxY + 1) & 15) << 8;
                             for (int i = index; i < arr.length; i++) {
-                                arr[i] = 0;
+                                arr[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         } else {
                             arr = new char[4096];
@@ -130,7 +131,7 @@ public interface IBatchProcessor {
                 if (arr != null) {
                     int index = (minY & 15) << 8;
                     for (int i = index; i < 4096; i++) {
-                        arr[i] = 0;
+                        arr[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
                     }
                 }
                 set.setBlocks(layer, arr);
@@ -139,7 +140,7 @@ public interface IBatchProcessor {
                 if (arr != null) {
                     int index = ((maxY + 1) & 15) << 8;
                     for (int i = 0; i < index; i++) {
-                        arr[i] = 0;
+                        arr[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
                     }
                 }
                 set.setBlocks(layer, arr);

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/IChunkSet.java

@@ -8,8 +8,9 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-import java.util.HashMap;
+import java.util.EnumMap;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
@@ -95,7 +96,7 @@ public interface IChunkSet extends IBlocks, OutputExtent {
     }
 
     default Map<HeightMapType, int[]> getHeightMaps() {
-        return new HashMap<>();
+        return new EnumMap<>(HeightMapType.class);
     }
 
     @Override
@@ -115,4 +116,15 @@ public interface IChunkSet extends IBlocks, OutputExtent {
      */
     boolean hasBiomes(int layer);
 
+    /**
+     * Create an entirely distinct copy of this SET instance. All mutable data must be copied to sufficiently prevent leakage
+     * between the copy and the original.
+     *
+     * @return distinct new {@link IChunkSet instance}
+     */
+    @Nonnull
+    default IChunkSet createCopy() {
+        return this;
+    }
+
 }

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/QueueHandler.java

@@ -14,6 +14,7 @@ import com.fastasyncworldedit.core.queue.implementation.chunk.ChunkCache;
 import com.fastasyncworldedit.core.util.MemUtil;
 import com.fastasyncworldedit.core.util.TaskManager;
 import com.fastasyncworldedit.core.util.collection.CleanableThreadLocal;
+import com.fastasyncworldedit.core.util.task.FaweForkJoinWorkerThreadFactory;
 import com.fastasyncworldedit.core.wrappers.WorldWrapper;
 import com.google.common.util.concurrent.Futures;
 import com.sk89q.worldedit.world.World;
@@ -39,10 +40,41 @@ import java.util.function.Supplier;
 @SuppressWarnings({"unchecked", "rawtypes"})
 public abstract class QueueHandler implements Trimable, Runnable {
 
-    private final ForkJoinPool forkJoinPoolPrimary = new ForkJoinPool();
-    private final ForkJoinPool forkJoinPoolSecondary = new ForkJoinPool();
+    private static final int PROCESSORS = Runtime.getRuntime().availableProcessors();
+
+    /**
+     * Primary queue should be used for tasks that are unlikely to wait on other tasks, IO, etc. (i.e. spend most of their
+     * time utilising CPU.
+     */
+    private final ForkJoinPool forkJoinPoolPrimary = new ForkJoinPool(
+            PROCESSORS,
+            new FaweForkJoinWorkerThreadFactory("FAWE Fork Join Pool Primary - %s"),
+            null,
+            false
+    );
+    /**
+     * Secondary queue should be used for "cleanup" tasks that are likely to be shorter in life than those submitted to the
+     * primary queue. They may be IO-bound tasks.
+     */
+    private final ForkJoinPool forkJoinPoolSecondary = new ForkJoinPool(
+            PROCESSORS,
+            new FaweForkJoinWorkerThreadFactory("FAWE Fork Join Pool Secondary - %s"),
+            null,
+            false
+    );
+    /**
+     * Main "work-horse" queue for FAWE. Handles chunk submission (and chunk submission alone). Blocking in order to forcibly
+     * prevent overworking/over-submission of chunk process tasks.
+     */
     private final ThreadPoolExecutor blockingExecutor = FaweCache.INSTANCE.newBlockingExecutor();
+    /**
+     * Queue for tasks to be completed on the main thread. These take priority of tasks submitted to syncWhenFree queue
+     */
     private final ConcurrentLinkedQueue<FutureTask> syncTasks = new ConcurrentLinkedQueue<>();
+    /**
+     * Queue for tasks to be completed on the main thread. These are completed only if and when there is time left in a tick
+     * after completing all tasks in the syncTasks queue
+     */
     private final ConcurrentLinkedQueue<FutureTask> syncWhenFree = new ConcurrentLinkedQueue<>();
 
     private final Map<World, WeakReference<IChunkCache<IChunkGet>>> chunkGetCache = new HashMap<>();
@@ -53,9 +85,8 @@ public abstract class QueueHandler implements Trimable, Runnable {
      */
     private long last;
     private long allocate = 50;
-    private double targetTPS = 18;
 
-    public QueueHandler() {
+    protected QueueHandler() {
         TaskManager.taskManager().repeat(this, 1);
     }
 
@@ -81,13 +112,19 @@ public abstract class QueueHandler implements Trimable, Runnable {
         }
     }
 
+    /**
+     * Get if the {@code blockingExecutor} is saturated with tasks or not. Under-utilisation implies the queue has space for
+     * more submissions.
+     *
+     * @return true if {@code blockingExecutor} is not saturated with tasks
+     */
     public boolean isUnderutilized() {
         return blockingExecutor.getActiveCount() < blockingExecutor.getMaximumPoolSize();
     }
 
     private long getAllocate() {
         long now = System.currentTimeMillis();
-        targetTPS = 18 - Math.max(Settings.settings().QUEUE.EXTRA_TIME_MS * 0.05, 0);
+        double targetTPS = 18 - Math.max(Settings.settings().QUEUE.EXTRA_TIME_MS * 0.05, 0);
         long diff = 50 + this.last - (this.last = now);
         long absDiff = Math.abs(diff);
         if (diff == 0) {
@@ -126,6 +163,10 @@ public abstract class QueueHandler implements Trimable, Runnable {
         } while (System.currentTimeMillis() - start < currentAllocate);
     }
 
+    /**
+     * @deprecated For removal without replacement.
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
     public <T extends Future<T>> void complete(Future<T> task) {
         try {
             while (task != null) {
@@ -136,49 +177,140 @@ public abstract class QueueHandler implements Trimable, Runnable {
         }
     }
 
+    /**
+     * Complete a task in the {@code forkJoinPoolSecondary} queue. Secondary queue should be used for "cleanup" tasks that are
+     * likely to be shorter in life than those submitted to the primary queue. They may be IO-bound tasks.
+     *
+     * @param run   Runnable to run
+     * @param value Value to return when done
+     * @param <T>   Value type
+     * @return Future for submitted task
+     */
     public <T> Future<T> async(Runnable run, T value) {
         return forkJoinPoolSecondary.submit(run, value);
     }
 
+    /**
+     * Complete a task in the {@code forkJoinPoolSecondary} queue. Secondary queue should be used for "cleanup" tasks that are
+     * likely to be shorter in life than those submitted to the primary queue. They may be IO-bound tasks.
+     *
+     * @param run Runnable to run
+     * @return Future for submitted task
+     */
     public Future<?> async(Runnable run) {
         return forkJoinPoolSecondary.submit(run);
     }
 
+    /**
+     * Complete a task in the {@code forkJoinPoolSecondary} queue. Secondary queue should be used for "cleanup" tasks that are
+     * likely to be shorter in life than those submitted to the primary queue. They may be IO-bound tasks.
+     *
+     * @param call Callable to run
+     * @param <T>  Return value type
+     * @return Future for submitted task
+     */
     public <T> Future<T> async(Callable<T> call) {
         return forkJoinPoolSecondary.submit(call);
     }
 
-    public ForkJoinTask submit(Runnable call) {
-        return forkJoinPoolPrimary.submit(call);
+    /**
+     * Complete a task in the {@code forkJoinPoolPrimary} queue. Primary queue should be used for tasks that are unlikely to
+     * wait on other tasks, IO, etc. (i.e. spend most of their time utilising CPU.
+     *
+     * @param run Task to run
+     * @return {@link ForkJoinTask} representing task being run
+     */
+    public ForkJoinTask submit(Runnable run) {
+        return forkJoinPoolPrimary.submit(run);
     }
 
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps.
+     *
+     * @param run Task to run
+     * @param <T> Value type
+     * @return Future representing task
+     */
     public <T> Future<T> sync(Runnable run) {
         return sync(run, syncTasks);
     }
 
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps.
+     *
+     * @param call Task to run
+     * @param <T>  Value type
+     * @return Future representing task
+     */
     public <T> Future<T> sync(Callable<T> call) throws Exception {
         return sync(call, syncTasks);
     }
 
-    public <T> Future<T> sync(Supplier<T> call) {
-        return sync(call, syncTasks);
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps.
+     *
+     * @param supplier Task to run
+     * @param <T>      Value type
+     * @return Future representing task
+     */
+    public <T> Future<T> sync(Supplier<T> supplier) {
+        return sync(supplier, syncTasks);
     }
 
-    // Lower priority sync task (runs only when there are no other tasks)
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps. Takes lower priority than tasks submitted via any {@code QueueHandler#sync} method. Completed
+     * only if and when there is time left in a tick after completing all sync tasks submitted using the aforementioned methods.
+     *
+     * @param run   Task to run
+     * @param value Value to return when done
+     * @param <T>   Value type
+     * @return Future representing task
+     */
     public <T> Future<T> syncWhenFree(Runnable run, T value) {
         return sync(run, value, syncWhenFree);
     }
 
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps. Takes lower priority than tasks submitted via any {@code QueueHandler#sync} method. Completed
+     * only if and when there is time left in a tick after completing all sync tasks submitted using the aforementioned methods.
+     *
+     * @param run Task to run
+     * @param <T> Value type
+     * @return Future representing task
+     */
     public <T> Future<T> syncWhenFree(Runnable run) {
         return sync(run, syncWhenFree);
     }
 
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps. Takes lower priority than tasks submitted via any {@code QueueHandler#sync} method. Completed
+     * only if and when there is time left in a tick after completing all sync tasks submitted using the aforementioned methods.
+     *
+     * @param call Task to run
+     * @param <T>  Value type
+     * @return Future representing task
+     */
     public <T> Future<T> syncWhenFree(Callable<T> call) throws Exception {
         return sync(call, syncWhenFree);
     }
 
-    public <T> Future<T> syncWhenFree(Supplier<T> call) {
-        return sync(call, syncWhenFree);
+    /**
+     * Submit a task to be run on the main thread. Does not guarantee to be run on the next tick as FAWE will only operate to
+     * maintain approx. 18 tps. Takes lower priority than tasks submitted via any {@code QueueHandler#sync} method. Completed
+     * only if and when there is time left in a tick after completing all sync tasks submitted using the aforementioned methods.
+     *
+     * @param supplier Task to run
+     * @param <T>      Value type
+     * @return Future representing task
+     */
+    public <T> Future<T> syncWhenFree(Supplier<T> supplier) {
+        return sync(supplier, syncWhenFree);
     }
 
     private <T> Future<T> sync(Runnable run, T value, Queue<FutureTask> queue) {
@@ -229,6 +361,15 @@ public abstract class QueueHandler implements Trimable, Runnable {
         }
     }
 
+    /**
+     * Internal use only. Specifically for submitting {@link IQueueChunk} for "processing" an edit. Submits to the blocking
+     * executor, the main "work-horse" queue for FAWE. Handles chunk submission (and chunk submission alone). Blocking in order
+     * to forcibly prevent overworking/over-submission of chunk process tasks.
+     *
+     * @param chunk chunk
+     * @param <T>
+     * @return Future representing task
+     */
     public <T extends Future<T>> T submit(IQueueChunk<T> chunk) {
 //        if (MemUtil.isMemoryFree()) { TODO NOT IMPLEMENTED - optimize this
 //            return (T) forkJoinPoolSecondary.submit(chunk);
@@ -260,6 +401,9 @@ public abstract class QueueHandler implements Trimable, Runnable {
         return new SingleThreadQueueExtent();
     }
 
+    /**
+     * Sets the current thread's {@link IQueueExtent} instance in the queue pool to null.
+     */
     public void unCache() {
         queuePool.set(null);
     }
@@ -272,14 +416,58 @@ public abstract class QueueHandler implements Trimable, Runnable {
         return queue;
     }
 
-    public abstract void startSet(boolean parallel);
+    /**
+     * Indicate a "set" task is being started.
+     *
+     * @param parallel if the "set" being started is parallel/async
+     * @deprecated To be replaced by better-named {@link QueueHandler#startUnsafe(boolean)} )}
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
+    public void startSet(boolean parallel) {
+        startUnsafe(parallel);
+    }
 
-    public abstract void endSet(boolean parallel);
 
+    /**
+     * Indicate a "set" task is ending.
+     *
+     * @param parallel if the "set" being started is parallel/async
+     * @deprecated To be replaced by better-named {@link QueueHandler#endUnsafe(boolean)} )}
+     */
+    @Deprecated(forRemoval = true, since = "2.6.2")
+    public void endSet(boolean parallel) {
+        startUnsafe(parallel);
+    }
+
+    /**
+     * Indicate an unsafe task is starting. Physics are frozen, async catchers disabled, etc. for the duration of the task
+     *
+     * @param parallel If the task is being run async and/or in parallel
+     */
+    public abstract void startUnsafe(boolean parallel);
+
+    /**
+     * Indicate a/the unsafe task submitted after a {@link QueueHandler#startUnsafe(boolean)} call has ended.
+     *
+     * @param parallel If the task was being run async and/or in parallel
+     */
+    public abstract void endUnsafe(boolean parallel);
+
+    /**
+     * Create a new queue for a given world.
+     */
     public IQueueExtent<IQueueChunk> getQueue(World world) {
         return getQueue(world, null, null);
     }
 
+    /**
+     * Create a new queue for a given world.
+     *
+     * @param world         World to create queue for
+     * @param processor     existing processor to set to queue or null
+     * @param postProcessor existing post-processor to set to queue or null
+     * @return New queue for given world
+     */
     public IQueueExtent<IQueueChunk> getQueue(World world, IBatchProcessor processor, IBatchProcessor postProcessor) {
         final IQueueExtent<IQueueChunk> queue = pool();
         IChunkCache<IChunkGet> cacheGet = getOrCreateWorldCache(world);
@@ -294,6 +482,12 @@ public abstract class QueueHandler implements Trimable, Runnable {
         return queue;
     }
 
+    /**
+     * Trims each chunk GET cache
+     *
+     * @param aggressive if each chunk GET cache should be trimmed aggressively
+     * @return true if all chunk GET caches could be trimmed
+     */
     @Override
     public boolean trim(boolean aggressive) {
         boolean result = true;

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/SingleThreadQueueExtent.java

@@ -275,8 +275,8 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
      * Get a new IChunk from either the pool, or create a new one<br> + Initialize it at the
      * coordinates
      *
-     * @param chunkX
-     * @param chunkZ
+     * @param chunkX X chunk coordinate
+     * @param chunkZ Z chunk coordinate
      * @return IChunk
      */
     private ChunkHolder poolOrCreate(int chunkX, int chunkZ) {
@@ -309,19 +309,11 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
             // If queueing is enabled AND either of the following
             //  - memory is low & queue size > num threads + 8
             //  - queue size > target size and primary queue has less than num threads submissions
-            if (enabledQueue && ((lowMem && size > Settings.settings().QUEUE.PARALLEL_THREADS + 8) || (size > Settings.settings().QUEUE.TARGET_SIZE && Fawe
-                    .instance()
-                    .getQueueHandler()
-                    .isUnderutilized()))) {
+            int targetSize = lowMem ? Settings.settings().QUEUE.PARALLEL_THREADS + 8 : Settings.settings().QUEUE.TARGET_SIZE;
+            if (enabledQueue && size > targetSize && (lowMem || Fawe.instance().getQueueHandler().isUnderutilized())) {
                 chunk = chunks.removeFirst();
                 final Future future = submitUnchecked(chunk);
                 if (future != null && !future.isDone()) {
-                    final int targetSize;
-                    if (lowMem) {
-                        targetSize = Settings.settings().QUEUE.PARALLEL_THREADS + 8;
-                    } else {
-                        targetSize = Settings.settings().QUEUE.TARGET_SIZE;
-                    }
                     pollSubmissions(targetSize, lowMem);
                     submissions.add(future);
                 }

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/blocks/CharSetBlocks.java

@@ -15,12 +15,11 @@ import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.HashMap;
+import java.util.EnumMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
-import java.util.stream.IntStream;
 
 public class CharSetBlocks extends CharBlocks implements IChunkSet {
 
@@ -40,7 +39,7 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
     public BlockVector3ChunkMap<CompoundTag> tiles;
     public HashSet<CompoundTag> entities;
     public HashSet<UUID> entityRemoves;
-    public Map<HeightMapType, int[]> heightMaps;
+    public EnumMap<HeightMapType, int[]> heightMaps;
     private boolean fastMode = false;
     private int bitMask = -1;
 
@@ -93,7 +92,7 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
 
     @Override
     public Map<HeightMapType, int[]> getHeightMaps() {
-        return heightMaps == null ? new HashMap<>() : heightMaps;
+        return heightMaps == null ? new EnumMap<>(HeightMapType.class) : heightMaps;
     }
 
     @Override
@@ -177,7 +176,7 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
     @Override
     public void setHeightMap(HeightMapType type, int[] heightMap) {
         if (heightMaps == null) {
-            heightMaps = new HashMap<>();
+            heightMaps = new EnumMap<>(HeightMapType.class);
         }
         heightMaps.put(type, heightMap);
     }
@@ -306,8 +305,12 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
                 || (heightMaps != null && !heightMaps.isEmpty())) {
             return false;
         }
-        //noinspection SimplifyStreamApiCallChains - this is faster than using #noneMatch
-        return !IntStream.range(minSectionPosition, maxSectionPosition + 1).anyMatch(this::hasSection);
+        for (int i =  minSectionPosition; i <= maxSectionPosition; i++) {
+            if (hasSection(i)) {
+                return false;
+            }
+        }
+        return true;
     }
 
     @Override
@@ -316,6 +319,9 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
         tiles = null;
         entities = null;
         entityRemoves = null;
+        light = null;
+        skyLight = null;
+        heightMaps = null;
         super.reset();
         return null;
     }
@@ -329,6 +335,62 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
         return biomes != null && biomes[layer] != null;
     }
 
+    @Override
+    public ThreadUnsafeCharBlocks createCopy() {
+        char[][] blocksCopy = new char[sectionCount][];
+        for (int i = 0; i < sectionCount; i++) {
+            if (blocks[i] != null) {
+                blocksCopy[i] = new char[FaweCache.INSTANCE.BLOCKS_PER_LAYER];
+                System.arraycopy(blocks[i], 0, blocksCopy[i], 0, FaweCache.INSTANCE.BLOCKS_PER_LAYER);
+            }
+        }
+        BiomeType[][] biomesCopy;
+        if (biomes == null) {
+            biomesCopy = null;
+        } else {
+            biomesCopy = new BiomeType[sectionCount][];
+            for (int i = 0; i < sectionCount; i++) {
+                if (biomes[i] != null) {
+                    biomesCopy[i] = new BiomeType[biomes[i].length];
+                    System.arraycopy(biomes[i], 0, biomesCopy[i], 0, biomes[i].length);
+                }
+            }
+        }
+        char[][] lightCopy = createLightCopy(light, sectionCount);
+        char[][] skyLightCopy = createLightCopy(skyLight, sectionCount);
+        return new ThreadUnsafeCharBlocks(
+                blocksCopy,
+                minSectionPosition,
+                maxSectionPosition,
+                biomesCopy,
+                sectionCount,
+                lightCopy,
+                skyLightCopy,
+                tiles != null ? new BlockVector3ChunkMap<>(tiles) : null,
+                entities != null ? new HashSet<>(entities) : null,
+                entityRemoves != null ? new HashSet<>(entityRemoves) : null,
+                heightMaps != null ? new EnumMap<>(heightMaps) : null,
+                defaultOrdinal(),
+                fastMode,
+                bitMask
+        );
+    }
+
+    static char[][] createLightCopy(char[][] lightArr, int sectionCount) {
+        if (lightArr == null) {
+            return null;
+        } else {
+            char[][] lightCopy = new char[sectionCount][];
+            for (int i = 0; i < sectionCount; i++) {
+                if (lightArr[i] != null) {
+                    lightCopy[i] = new char[lightArr[i].length];
+                    System.arraycopy(lightArr[i], 0, lightCopy[i], 0, lightArr[i].length);
+                }
+            }
+            return lightCopy;
+        }
+    }
+
     @Override
     public char[] load(final int layer) {
         updateSectionIndexRange(layer);
@@ -348,67 +410,47 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
         if (layer < minSectionPosition) {
             int diff = minSectionPosition - layer;
             sectionCount += diff;
-            char[][] tmpBlocks = new char[sectionCount][];
-            Section[] tmpSections = new Section[sectionCount];
-            Object[] tmpSectionLocks = new Object[sectionCount];
-            System.arraycopy(blocks, 0, tmpBlocks, diff, blocks.length);
-            System.arraycopy(sections, 0, tmpSections, diff, sections.length);
-            System.arraycopy(sectionLocks, 0, tmpSectionLocks, diff, sections.length);
-            for (int i = 0; i < diff; i++) {
-                tmpSections[i] = EMPTY;
-                tmpSectionLocks[i] = new Object();
-            }
-            blocks = tmpBlocks;
-            sections = tmpSections;
-            sectionLocks = tmpSectionLocks;
             minSectionPosition = layer;
-            if (biomes != null) {
-                BiomeType[][] tmpBiomes = new BiomeType[sectionCount][64];
-                System.arraycopy(biomes, 0, tmpBiomes, diff, biomes.length);
-                biomes = tmpBiomes;
-            }
-            if (light != null) {
-                char[][] tmplight = new char[sectionCount][];
-                System.arraycopy(light, 0, tmplight, diff, light.length);
-                light = tmplight;
-            }
-            if (skyLight != null) {
-                char[][] tmplight = new char[sectionCount][];
-                System.arraycopy(skyLight, 0, tmplight, diff, skyLight.length);
-                skyLight = tmplight;
-            }
+            resizeSectionsArrays(diff, false); // prepend new layer(s)
         } else {
             int diff = layer - maxSectionPosition;
             sectionCount += diff;
-            char[][] tmpBlocks = new char[sectionCount][];
-            Section[] tmpSections = new Section[sectionCount];
-            Object[] tmpSectionLocks = new Object[sectionCount];
-            System.arraycopy(blocks, 0, tmpBlocks, 0, blocks.length);
-            System.arraycopy(sections, 0, tmpSections, 0, sections.length);
-            System.arraycopy(sectionLocks, 0, tmpSectionLocks, 0, sections.length);
-            for (int i = sectionCount - diff; i < sectionCount; i++) {
-                tmpSections[i] = EMPTY;
-                tmpSectionLocks[i] = new Object();
-            }
-            blocks = tmpBlocks;
-            sections = tmpSections;
-            sectionLocks = tmpSectionLocks;
             maxSectionPosition = layer;
-            if (biomes != null) {
-                BiomeType[][] tmpBiomes = new BiomeType[sectionCount][64];
-                System.arraycopy(biomes, 0, tmpBiomes, 0, biomes.length);
-                biomes = tmpBiomes;
-            }
-            if (light != null) {
-                char[][] tmplight = new char[sectionCount][];
-                System.arraycopy(light, 0, tmplight, 0, light.length);
-                light = tmplight;
-            }
-            if (skyLight != null) {
-                char[][] tmplight = new char[sectionCount][];
-                System.arraycopy(skyLight, 0, tmplight, 0, skyLight.length);
-                skyLight = tmplight;
-            }
+            resizeSectionsArrays(diff, true); // append new layer(s)
+        }
+    }
+
+    private void resizeSectionsArrays(int diff, boolean appendNew) {
+        char[][] tmpBlocks = new char[sectionCount][];
+        Section[] tmpSections = new Section[sectionCount];
+        Object[] tmpSectionLocks = new Object[sectionCount];
+        int destPos = appendNew ? 0 : diff;
+        System.arraycopy(blocks, 0, tmpBlocks, destPos, blocks.length);
+        System.arraycopy(sections, 0, tmpSections, destPos, sections.length);
+        System.arraycopy(sectionLocks, 0, tmpSectionLocks, destPos, sections.length);
+        int toFillFrom = appendNew ? sectionCount - diff : 0;
+        int toFillTo = appendNew ? sectionCount : diff;
+        for (int i = toFillFrom; i < toFillTo; i++) {
+            tmpSections[i] = EMPTY;
+            tmpSectionLocks[i] = new Object();
+        }
+        blocks = tmpBlocks;
+        sections = tmpSections;
+        sectionLocks = tmpSectionLocks;
+        if (biomes != null) {
+            BiomeType[][] tmpBiomes = new BiomeType[sectionCount][64];
+            System.arraycopy(biomes, 0, tmpBiomes, destPos, biomes.length);
+            biomes = tmpBiomes;
+        }
+        if (light != null) {
+            char[][] tmplight = new char[sectionCount][];
+            System.arraycopy(light, 0, tmplight, destPos, light.length);
+            light = tmplight;
+        }
+        if (skyLight != null) {
+            char[][] tmplight = new char[sectionCount][];
+            System.arraycopy(skyLight, 0, tmplight, destPos, skyLight.length);
+            skyLight = tmplight;
         }
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/blocks/ThreadUnsafeCharBlocks.java

@@ -0,0 +1,531 @@
+package com.fastasyncworldedit.core.queue.implementation.blocks;
+
+import com.fastasyncworldedit.core.Fawe;
+import com.fastasyncworldedit.core.FaweCache;
+import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
+import com.fastasyncworldedit.core.math.BlockVector3ChunkMap;
+import com.fastasyncworldedit.core.queue.IBlocks;
+import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.internal.util.LogManagerCompat;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.world.biome.BiomeType;
+import com.sk89q.worldedit.world.block.BlockState;
+import com.sk89q.worldedit.world.block.BlockStateHolder;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
+import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.EnumMap;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * Equivalent to {@link CharSetBlocks} without any attempt to make thread-safe for improved performance.
+ * This is currently only used as a "copy" of {@link CharSetBlocks} to provide to
+ * {@link com.fastasyncworldedit.core.queue.IBatchProcessor} instances for processing without overlapping the continuing edit.
+ *
+ * @since 2.6.2
+ */
+public class ThreadUnsafeCharBlocks implements IChunkSet, IBlocks {
+
+    private static final Logger LOGGER = LogManagerCompat.getLogger();
+
+    private final char defaultOrdinal;
+    private char[][] blocks;
+    private int minSectionPosition;
+    private int maxSectionPosition;
+    private int sectionCount;
+    private BiomeType[][] biomes;
+    private char[][] light;
+    private char[][] skyLight;
+    private BlockVector3ChunkMap<CompoundTag> tiles;
+    private HashSet<CompoundTag> entities;
+    private HashSet<UUID> entityRemoves;
+    private Map<HeightMapType, int[]> heightMaps;
+    private boolean fastMode;
+    private int bitMask;
+
+    /**
+     * New instance given the data stored in a {@link CharSetBlocks} instance.
+     *
+     * @since 2.6.2
+     */
+    ThreadUnsafeCharBlocks(
+            char[][] blocks,
+            int minSectionPosition,
+            int maxSectionPosition,
+            BiomeType[][] biomes,
+            int sectionCount,
+            char[][] light,
+            char[][] skyLight,
+            BlockVector3ChunkMap<CompoundTag> tiles,
+            HashSet<CompoundTag> entities,
+            HashSet<UUID> entityRemoves,
+            Map<HeightMapType, int[]> heightMaps,
+            char defaultOrdinal,
+            boolean fastMode,
+            int bitMask
+    ) {
+        this.blocks = blocks;
+        this.minSectionPosition = minSectionPosition;
+        this.maxSectionPosition = maxSectionPosition;
+        this.biomes = biomes;
+        this.sectionCount = sectionCount;
+        this.light = light;
+        this.skyLight = skyLight;
+        this.tiles = tiles;
+        this.entities = entities;
+        this.entityRemoves = entityRemoves;
+        this.heightMaps = heightMaps;
+        this.defaultOrdinal = defaultOrdinal;
+        this.fastMode = fastMode;
+        this.bitMask = bitMask;
+    }
+
+    @Override
+    public boolean hasSection(int layer) {
+        layer -= minSectionPosition;
+        return layer >= 0 && layer < blocks.length && blocks[layer] != null && blocks[layer].length == FaweCache.INSTANCE.BLOCKS_PER_LAYER;
+    }
+
+    @Override
+    public char[] load(int layer) {
+        updateSectionIndexRange(layer);
+        layer -= minSectionPosition;
+        char[] arr = blocks[layer];
+        if (arr == null) {
+            arr = blocks[layer] = new char[FaweCache.INSTANCE.BLOCKS_PER_LAYER];
+        }
+        return arr;
+    }
+
+    @Nullable
+    @Override
+    public char[] loadIfPresent(int layer) {
+        if (layer < minSectionPosition || layer > maxSectionPosition) {
+            return null;
+        }
+        layer -= minSectionPosition;
+        return blocks[layer];
+    }
+
+    @Override
+    public Map<BlockVector3, CompoundTag> getTiles() {
+        return tiles == null ? Collections.emptyMap() : tiles;
+    }
+
+    @Override
+    public CompoundTag getTile(int x, int y, int z) {
+        return tiles.get(x, y, z);
+    }
+
+    @Override
+    public Set<CompoundTag> getEntities() {
+        return entities == null ? Collections.emptySet() : entities;
+    }
+
+    @Override
+    public Map<HeightMapType, int[]> getHeightMaps() {
+        return heightMaps == null ? new HashMap<>() : heightMaps;
+    }
+
+    @Override
+    public void removeSectionLighting(int layer, boolean sky) {
+        updateSectionIndexRange(layer);
+        layer -= minSectionPosition;
+        if (light == null) {
+            light = new char[sectionCount][];
+        }
+        if (light[layer] == null) {
+            light[layer] = new char[4096];
+        }
+        Arrays.fill(light[layer], (char) 0);
+        if (sky) {
+            if (skyLight == null) {
+                skyLight = new char[sectionCount][];
+            }
+            if (skyLight[layer] == null) {
+                skyLight[layer] = new char[4096];
+            }
+            Arrays.fill(skyLight[layer], (char) 0);
+        }
+    }
+
+    @Override
+    public boolean trim(boolean aggressive, int layer) {
+        return false;
+    }
+
+    @Override
+    public int getSectionCount() {
+        return sectionCount;
+    }
+
+    @Override
+    public int getMaxSectionPosition() {
+        return maxSectionPosition;
+    }
+
+    @Override
+    public int getMinSectionPosition() {
+        return minSectionPosition;
+    }
+
+    public char get(int x, int y, int z) {
+        int layer = (y >> 4);
+        if (!hasSection(layer)) {
+            return defaultOrdinal;
+        }
+        final int index = (y & 15) << 8 | z << 4 | x;
+        return blocks[layer - minSectionPosition][index];
+    }
+
+    @Override
+    public BiomeType getBiomeType(int x, int y, int z) {
+        int layer;
+        if (biomes == null || (y >> 4) < minSectionPosition || (y >> 4) > maxSectionPosition) {
+            return null;
+        } else if (biomes[(layer = (y >> 4) - minSectionPosition)] == null) {
+            return null;
+        }
+        return biomes[layer][(y & 15) >> 2 | (z >> 2) << 2 | x >> 2];
+    }
+
+    @Override
+    public BlockState getBlock(int x, int y, int z) {
+        return BlockTypesCache.states[get(x, y, z)];
+    }
+
+    @Override
+    public boolean setBiome(int x, int y, int z, BiomeType biome) {
+        updateSectionIndexRange(y >> 4);
+        int layer = (y >> 4) - minSectionPosition;
+        if (biomes == null) {
+            biomes = new BiomeType[sectionCount][];
+            biomes[layer] = new BiomeType[64];
+        } else if (biomes[layer] == null) {
+            biomes[layer] = new BiomeType[64];
+        }
+        biomes[layer][(y & 12) << 2 | (z & 12) | (x & 12) >> 2] = biome;
+        return true;
+    }
+
+    @Override
+    public boolean setBiome(BlockVector3 position, BiomeType biome) {
+        return setBiome(position.getX(), position.getY(), position.getZ(), biome);
+    }
+
+    public void set(int x, int y, int z, char value) {
+        final int layer = y >> 4;
+        final int index = (y & 15) << 8 | z << 4 | x;
+        try {
+            blocks[layer][index] = value;
+        } catch (ArrayIndexOutOfBoundsException exception) {
+            LOGGER.error("Tried setting block at coordinates (" + x + "," + y + "," + z + ")");
+            assert Fawe.platform() != null;
+            LOGGER.error("Layer variable was = {}", layer, exception);
+        }
+    }
+
+    @Override
+    public <T extends BlockStateHolder<T>> boolean setBlock(int x, int y, int z, T holder) {
+        updateSectionIndexRange(y >> 4);
+        set(x, y, z, holder.getOrdinalChar());
+        holder.applyTileEntity(this, x, y, z);
+        return true;
+    }
+
+    @Override
+    public void setBlocks(int layer, char[] data) {
+        updateSectionIndexRange(layer);
+        layer -= minSectionPosition;
+        this.blocks[layer] = data;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        if (biomes != null
+                || light != null
+                || skyLight != null
+                || (entities != null && !entities.isEmpty())
+                || (tiles != null && !tiles.isEmpty())
+                || (entityRemoves != null && !entityRemoves.isEmpty())
+                || (heightMaps != null && !heightMaps.isEmpty())) {
+            return false;
+        }
+        for (int i =  minSectionPosition; i <= maxSectionPosition; i++) {
+            if (hasSection(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public boolean setTile(int x, int y, int z, CompoundTag tile) {
+        updateSectionIndexRange(y >> 4);
+        if (tiles == null) {
+            tiles = new BlockVector3ChunkMap<>();
+        }
+        tiles.put(x, y, z, tile);
+        return true;
+    }
+
+    @Override
+    public void setBlockLight(int x, int y, int z, int value) {
+        updateSectionIndexRange(y >> 4);
+        if (light == null) {
+            light = new char[sectionCount][];
+        }
+        final int layer = (y >> 4) - minSectionPosition;
+        if (light[layer] == null) {
+            char[] c = new char[4096];
+            Arrays.fill(c, (char) 16);
+            light[layer] = c;
+        }
+        final int index = (y & 15) << 8 | (z & 15) << 4 | (x & 15);
+        light[layer][index] = (char) value;
+    }
+
+    @Override
+    public void setSkyLight(int x, int y, int z, int value) {
+        updateSectionIndexRange(y >> 4);
+        if (skyLight == null) {
+            skyLight = new char[sectionCount][];
+        }
+        final int layer = (y >> 4) - minSectionPosition;
+        if (skyLight[layer] == null) {
+            char[] c = new char[4096];
+            Arrays.fill(c, (char) 16);
+            skyLight[layer] = c;
+        }
+        final int index = (y & 15) << 8 | (z & 15) << 4 | (x & 15);
+        skyLight[layer][index] = (char) value;
+    }
+
+    @Override
+    public void setHeightMap(HeightMapType type, int[] heightMap) {
+        if (heightMaps == null) {
+            heightMaps = new EnumMap<>(HeightMapType.class);
+        }
+        heightMaps.put(type, heightMap);
+    }
+
+    @Override
+    public void setLightLayer(int layer, char[] toSet) {
+        updateSectionIndexRange(layer);
+        if (light == null) {
+            light = new char[sectionCount][];
+        }
+        layer -= minSectionPosition;
+        light[layer] = toSet;
+    }
+
+    @Override
+    public void setSkyLightLayer(int layer, char[] toSet) {
+        updateSectionIndexRange(layer);
+        if (skyLight == null) {
+            skyLight = new char[sectionCount][];
+        }
+        layer -= minSectionPosition;
+        skyLight[layer] = toSet;
+    }
+
+    @Override
+    public void setFullBright(int layer) {
+        updateSectionIndexRange(layer);
+        layer -= minSectionPosition;
+        if (light == null) {
+            light = new char[sectionCount][];
+        }
+        if (light[layer] == null) {
+            light[layer] = new char[4096];
+        }
+        if (skyLight == null) {
+            skyLight = new char[sectionCount][];
+        }
+        if (skyLight[layer] == null) {
+            skyLight[layer] = new char[4096];
+        }
+        Arrays.fill(light[layer], (char) 15);
+        Arrays.fill(skyLight[layer], (char) 15);
+    }
+
+    @Override
+    public void setEntity(CompoundTag tag) {
+        if (entities == null) {
+            entities = new HashSet<>();
+        }
+        entities.add(tag);
+    }
+
+    @Override
+    public void removeEntity(UUID uuid) {
+        if (entityRemoves == null) {
+            entityRemoves = new HashSet<>();
+        }
+        entityRemoves.add(uuid);
+    }
+
+    @Override
+    public void setFastMode(boolean fastMode) {
+        this.fastMode = fastMode;
+    }
+
+    @Override
+    public boolean isFastMode() {
+        return fastMode;
+    }
+
+    @Override
+    public void setBitMask(int bitMask) {
+        this.bitMask = bitMask;
+    }
+
+    @Override
+    public int getBitMask() {
+        return bitMask;
+    }
+
+    @Override
+    public Set<UUID> getEntityRemoves() {
+        return entityRemoves == null ? Collections.emptySet() : entityRemoves;
+    }
+
+    @Override
+    public BiomeType[][] getBiomes() {
+        return biomes;
+    }
+
+    @Override
+    public boolean hasBiomes() {
+        return IChunkSet.super.hasBiomes();
+    }
+
+    @Override
+    public char[][] getLight() {
+        return light;
+    }
+
+    @Override
+    public char[][] getSkyLight() {
+        return skyLight;
+    }
+
+    @Override
+    public boolean hasLight() {
+        return IChunkSet.super.hasLight();
+    }
+
+    @Override
+    public IChunkSet reset() {
+        blocks = new char[sectionCount][];
+        biomes = new BiomeType[sectionCount][];
+        light = new char[sectionCount][];
+        skyLight = new char[sectionCount][];
+        tiles.clear();
+        entities.clear();
+        entityRemoves.clear();
+        heightMaps.clear();
+        return this;
+    }
+
+    @Override
+    public boolean hasBiomes(int layer) {
+        layer -= minSectionPosition;
+        return layer >= 0 && layer < biomes.length && biomes[layer] != null && biomes[layer].length > 0;
+    }
+
+    @Override
+    public IChunkSet createCopy() {
+        char[][] blocksCopy = new char[sectionCount][];
+        for (int i = 0; i < sectionCount; i++) {
+            blocksCopy[i] = new char[FaweCache.INSTANCE.BLOCKS_PER_LAYER];
+            if (blocks[i] != null) {
+                System.arraycopy(blocks[i], 0, blocksCopy[i], 0, FaweCache.INSTANCE.BLOCKS_PER_LAYER);
+            }
+        }
+        BiomeType[][] biomesCopy;
+        if (biomes == null) {
+            biomesCopy = null;
+        } else {
+            biomesCopy = new BiomeType[sectionCount][];
+            for (int i = 0; i < sectionCount; i++) {
+                if (biomes[i] != null) {
+                    biomesCopy[i] = new BiomeType[biomes[i].length];
+                    System.arraycopy(biomes[i], 0, biomesCopy[i], 0, biomes[i].length);
+                }
+            }
+        }
+        char[][] lightCopy = CharSetBlocks.createLightCopy(light, sectionCount);
+        char[][] skyLightCopy = CharSetBlocks.createLightCopy(skyLight, sectionCount);
+        return new ThreadUnsafeCharBlocks(
+                blocksCopy,
+                minSectionPosition,
+                maxSectionPosition,
+                biomesCopy,
+                sectionCount,
+                lightCopy,
+                skyLightCopy,
+                tiles != null ? new BlockVector3ChunkMap<>(tiles) : null,
+                entities != null ? new HashSet<>(entities) : null,
+                entityRemoves != null ? new HashSet<>(entityRemoves) : null,
+                heightMaps != null ? new HashMap<>(heightMaps) : null,
+                defaultOrdinal,
+                fastMode,
+                bitMask
+        );
+    }
+
+    @Override
+    public boolean trim(boolean aggressive) {
+        return false;
+    }
+
+    // Checks and updates the various section arrays against the new layer index
+    private void updateSectionIndexRange(int layer) {
+        if (layer >= minSectionPosition && layer <= maxSectionPosition) {
+            return;
+        }
+        if (layer < minSectionPosition) {
+            int diff = minSectionPosition - layer;
+            sectionCount += diff;
+            minSectionPosition = layer;
+            resizeSectionsArrays(layer, diff, false); // prepend new layer(s)
+        } else {
+            int diff = layer - maxSectionPosition;
+            sectionCount += diff;
+            maxSectionPosition = layer;
+            resizeSectionsArrays(layer, diff, true); // append new layer(s)
+        }
+    }
+
+    private void resizeSectionsArrays(int layer, int diff, boolean appendNew) {
+        char[][] tmpBlocks = new char[sectionCount][];
+        int destPos = appendNew ? 0 : diff;
+        System.arraycopy(blocks, 0, tmpBlocks, destPos, blocks.length);
+        blocks = tmpBlocks;
+        if (biomes != null) {
+            BiomeType[][] tmpBiomes = new BiomeType[sectionCount][64];
+            System.arraycopy(biomes, 0, tmpBiomes, destPos, biomes.length);
+            biomes = tmpBiomes;
+        }
+        if (light != null) {
+            char[][] tmplight = new char[sectionCount][];
+            System.arraycopy(light, 0, tmplight, destPos, light.length);
+            light = tmplight;
+        }
+        if (skyLight != null) {
+            char[][] tmplight = new char[sectionCount][];
+            System.arraycopy(skyLight, 0, tmplight, destPos, skyLight.length);
+            skyLight = tmplight;
+        }
+    }
+
+}

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/chunk/ChunkHolder.java

@@ -1044,7 +1044,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
         if (chunkSet != null && !chunkSet.isEmpty()) {
             chunkSet.setBitMask(bitMask);
             try {
-                return this.call(chunkSet, () -> {
+                return this.call(chunkSet.createCopy(), () -> {
                     this.delegate = NULL;
                     chunkSet = null;
                     calledLock.unlock(stamp);

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/MainUtil.java

@@ -52,6 +52,7 @@ import java.io.PrintWriter;
 import java.lang.reflect.Array;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
+import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.net.URLConnection;
@@ -68,7 +69,6 @@ import java.nio.file.StandardCopyOption;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
@@ -81,10 +81,8 @@ import java.util.concurrent.atomic.AtomicLong;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.regex.Pattern;
-import java.util.zip.DataFormatException;
 import java.util.zip.Deflater;
 import java.util.zip.GZIPInputStream;
-import java.util.zip.Inflater;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
@@ -533,6 +531,21 @@ public class MainUtil {
         return readImage(new FileInputStream(file));
     }
 
+    public static void checkImageHost(URI uri) throws IOException {
+        if (Settings.settings().WEB.ALLOWED_IMAGE_HOSTS.contains("*")) {
+            return;
+        }
+        String host = uri.getHost();
+        if (Settings.settings().WEB.ALLOWED_IMAGE_HOSTS.stream().anyMatch(host::equalsIgnoreCase)) {
+            return;
+        }
+        throw new IOException(String.format(
+                "Host `%s` not allowed! Whitelisted image hosts are: %s",
+                host,
+                StringMan.join(Settings.settings().WEB.ALLOWED_IMAGE_HOSTS, ", ")
+        ));
+    }
+
     public static BufferedImage toRGB(BufferedImage src) {
         if (src == null) {
             return src;

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/TaskManager.java

@@ -157,13 +157,13 @@ public abstract class TaskManager {
      */
     public void runUnsafe(Runnable run) {
         QueueHandler queue = Fawe.instance().getQueueHandler();
-        queue.startSet(true);
+        queue.startUnsafe(Fawe.isMainThread());
         try {
             run.run();
         } catch (Throwable e) {
             e.printStackTrace();
         }
-        queue.endSet(true);
+        queue.endUnsafe(Fawe.isMainThread());
     }
 
     /**

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/WEManager.java

@@ -130,7 +130,9 @@ public class WEManager {
                                 backupRegions.add(region);
                             }
                         } else {
-                            player.print(Caption.of("fawe.error.region-mask-invalid", mask.getClass().getSimpleName()));
+                            if (Settings.settings().ENABLED_COMPONENTS.DEBUG) {
+                                player.printDebug(Caption.of("fawe.error.region-mask-invalid", mask.getClass().getSimpleName()));
+                            }
                             removed = true;
                             iterator.remove();
                         }

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/collection/SimpleRandomCollection.java

@@ -36,7 +36,7 @@ public class SimpleRandomCollection<E> extends RandomCollection<E> {
 
     @Override
     public E next(int x, int y, int z) {
-        return map.ceilingEntry(getRandom().nextDouble(x, y, z)).getValue();
+        return map.ceilingEntry(getRandom().nextDouble(x, y, z) * this.total).getValue();
     }
 
 }

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/image/ImageUtil.java

@@ -203,6 +203,7 @@ public class ImageUtil {
                     arg = "https://i.imgur.com/" + arg.split("imgur.com/")[1] + ".png";
                 }
                 URL url = new URL(arg);
+                MainUtil.checkImageHost(url.toURI());
                 BufferedImage img = MainUtil.readImage(url);
                 if (img == null) {
                     throw new IOException("Failed to read " + url + ", please try again later");
@@ -218,7 +219,7 @@ public class ImageUtil {
                 return MainUtil.readImage(file);
             }
             throw new InputParseException(Caption.of("fawe.error.invalid-image", TextComponent.of(arg)));
-        } catch (IOException e) {
+        } catch (IOException | URISyntaxException e) {
             throw new InputParseException(TextComponent.of(e.getMessage()));
         }
     }
@@ -229,7 +230,9 @@ public class ImageUtil {
                 if (arg.contains("imgur.com") && !arg.contains("i.imgur.com")) {
                     arg = "https://i.imgur.com/" + arg.split("imgur.com/")[1] + ".png";
                 }
-                return new URL(arg).toURI();
+                URI uri = new URI(arg);
+                MainUtil.checkImageHost(uri);
+                return uri;
             }
             if (arg.startsWith("file:/")) {
                 arg = arg.replaceFirst("file:/+", "");

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/task/AsyncNotifyQueue.java

@@ -1,9 +1,13 @@
 package com.fastasyncworldedit.core.util.task;
 
 import com.fastasyncworldedit.core.Fawe;
+import com.fastasyncworldedit.core.configuration.Settings;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
 
 import java.io.Closeable;
 import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ForkJoinPool;
 import java.util.concurrent.Future;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
@@ -11,6 +15,13 @@ import java.util.function.Supplier;
 
 public class AsyncNotifyQueue implements Closeable {
 
+    private static final ForkJoinPool QUEUE_SUBMISSIONS = new ForkJoinPool(
+            Settings.settings().QUEUE.PARALLEL_THREADS,
+            new FaweForkJoinWorkerThreadFactory("AsyncNotifyQueue - %s"),
+            null,
+            false
+    );
+
     private final Lock lock = new ReentrantLock(true);
     private final Thread.UncaughtExceptionHandler handler;
     private boolean closed;
@@ -59,7 +70,7 @@ public class AsyncNotifyQueue implements Closeable {
             }
             return null;
         };
-        self[0] = Fawe.instance().getQueueHandler().async(wrapped);
+        self[0] = QUEUE_SUBMISSIONS.submit(wrapped);
         return self[0];
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/task/FaweForkJoinWorkerThreadFactory.java

@@ -0,0 +1,21 @@
+package com.fastasyncworldedit.core.util.task;
+
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinWorkerThread;
+
+public class FaweForkJoinWorkerThreadFactory implements ForkJoinPool.ForkJoinWorkerThreadFactory {
+
+    private final String nameFormat;
+
+    public FaweForkJoinWorkerThreadFactory(String nameFormat) {
+        this.nameFormat = nameFormat;
+    }
+
+    @Override
+    public ForkJoinWorkerThread newThread(ForkJoinPool pool) {
+        final ForkJoinWorkerThread worker = ForkJoinPool.defaultForkJoinWorkerThreadFactory.newThread(pool);
+        worker.setName(String.format(nameFormat, worker.getPoolIndex()));
+        return worker;
+    }
+
+}

worldedit-core/src/main/java/com/fastasyncworldedit/core/util/task/KeyQueuedExecutorService.java

@@ -0,0 +1,172 @@
+package com.fastasyncworldedit.core.util.task;
+
+import javax.annotation.Nonnull;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.FutureTask;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Executor service that queues tasks based on keys, executing tasks on a configurable {@link ThreadPoolExecutor}
+ *
+ * @param <K> Key type
+ * @since 2.6.2
+ */
+public class KeyQueuedExecutorService<K> {
+
+    private final ExecutorService parent;
+    private final Map<K, KeyRunner> keyQueue = new HashMap<>();
+
+    /**
+     * Create a new {@link KeyQueuedExecutorService} instance
+     *
+     * @param parent Parent {@link ExecutorService} to use for actual task completion
+     */
+    public KeyQueuedExecutorService(ExecutorService parent) {
+        this.parent = parent;
+    }
+
+    /**
+     * Delegates to {@link ThreadPoolExecutor#shutdown()}
+     */
+    public void shutdown() {
+        parent.shutdown();
+    }
+
+    /**
+     * Delegates to {@link ThreadPoolExecutor#shutdownNow()}
+     */
+    @Nonnull
+    public List<Runnable> shutdownNow() {
+        return parent.shutdownNow();
+    }
+
+    /**
+     * Delegates to {@link ThreadPoolExecutor#isShutdown()}
+     */
+    public boolean isShutdown() {
+        return parent.isShutdown();
+    }
+
+    /**
+     * Delegates to {@link ThreadPoolExecutor#isTerminated()}
+     */
+    public boolean isTerminated() {
+        return parent.isTerminated();
+    }
+
+    /**
+     * Delegates to {@link ThreadPoolExecutor#awaitTermination(long, TimeUnit)}
+     */
+    public boolean awaitTermination(long timeout, @Nonnull TimeUnit unit) throws InterruptedException {
+        return parent.awaitTermination(timeout, unit);
+    }
+
+    protected <T> FutureTask<T> newTaskFor(Runnable runnable, T value) {
+        return new FutureTask<>(runnable, value);
+    }
+
+    protected <T> FutureTask<T> newTaskFor(Callable<T> callable) {
+        return new FutureTask<>(callable);
+    }
+
+    @Nonnull
+    public <T> Future<T> submit(@Nonnull K key, @Nonnull Callable<T> task) {
+        FutureTask<T> ftask = newTaskFor(task);
+        execute(key, ftask);
+        return ftask;
+    }
+
+    @Nonnull
+    public <T> Future<T> submit(@Nonnull K key, @Nonnull Runnable task, T result) {
+        FutureTask<T> ftask = newTaskFor(task, result);
+        execute(key, ftask);
+        return ftask;
+    }
+
+    @Nonnull
+    public Future<?> submit(@Nonnull K key, @Nonnull Runnable task) {
+        FutureTask<Void> ftask = newTaskFor(task, null);
+        execute(key, ftask);
+        return ftask;
+    }
+
+    public void execute(@Nonnull K key, @Nonnull FutureTask<?> command) {
+        synchronized (keyQueue) {
+            boolean triggerRun = false;
+            KeyRunner runner = keyQueue.get(key);
+            if (runner == null) {
+                runner = new KeyRunner(key);
+                keyQueue.put(key, runner);
+                triggerRun = true;
+            }
+            runner.add(command);
+            if (triggerRun) {
+                runner.triggerRun();
+            }
+        }
+    }
+
+    private final class KeyRunner {
+
+        private final Queue<FutureTask<?>> tasks = new ConcurrentLinkedQueue<>();
+        private final K key;
+
+        private KeyRunner(K key) {
+            this.key = key;
+        }
+
+        void add(FutureTask<?> task) {
+            if (!tasks.add(task)) {
+                throw new RejectedExecutionException(rejection());
+            }
+        }
+
+        void triggerRun() {
+            Runnable task = tasks.poll();
+            if (task == null) {
+                throw new RejectedExecutionException(rejection());
+            }
+            try {
+                run(task);
+            } catch (RejectedExecutionException e) {
+                synchronized (keyQueue) {
+                    keyQueue.remove(key);
+                }
+                throw new RejectedExecutionException(rejection(), e);
+            }
+        }
+
+        private void run(Runnable task) {
+            parent.execute(() -> {
+                task.run();
+                Runnable next = tasks.poll();
+                if (next == null) {
+                    synchronized (keyQueue) {
+                        next = tasks.poll();
+                        if (next == null) {
+                            keyQueue.remove(key);
+                        }
+                    }
+                }
+                if (next != null) {
+                    run(next);
+                }
+            });
+        }
+
+        private String rejection() {
+            return "Task for the key '" + key + "' rejected";
+        }
+
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/EditSessionBuilder.java

@@ -531,16 +531,14 @@ public final class EditSessionBuilder {
             }
             if (allowedRegions == null && Settings.settings().REGION_RESTRICTIONS) {
                 if (actor != null && !actor.hasPermission("fawe.bypass.regions")) {
-                    if (actor instanceof Player) {
-                        Player player = (Player) actor;
+                    if (actor instanceof Player player) {
                         allowedRegions = player.getAllowedRegions();
                     }
                 }
             }
             if (disallowedRegions == null && Settings.settings().REGION_RESTRICTIONS && Settings.settings().REGION_RESTRICTIONS_OPTIONS.ALLOW_BLACKLISTS) {
                 if (actor != null && !actor.hasPermission("fawe.bypass.regions")) {
-                    if (actor instanceof Player) {
-                        Player player = (Player) actor;
+                    if (actor instanceof Player player) {
                         disallowedRegions = player.getDisallowedRegions();
                     }
                 }
@@ -561,6 +559,9 @@ public final class EditSessionBuilder {
                     }
                 }
             }
+            if (placeChunks && regionExtent != null) {
+                queue.addProcessor(regionExtent);
+            }
             // There's no need to do the below (and it'll also just be a pain to implement) if we're not placing chunks
             if (placeChunks) {
                 if (((relightMode != null && relightMode != RelightMode.NONE) || (relightMode == null && Settings.settings().LIGHTING.MODE > 0))) {
@@ -597,15 +598,14 @@ public final class EditSessionBuilder {
                 this.extent = regionExtent;
             }
             if (this.limit != null && this.limit.STRIP_NBT != null && !this.limit.STRIP_NBT.isEmpty()) {
+                this.extent = new StripNBTExtent(this.extent, this.limit.STRIP_NBT);
                 if (placeChunks) {
-                    queue.addProcessor(new StripNBTExtent(this.extent, this.limit.STRIP_NBT));
-                } else {
-                    this.extent = new StripNBTExtent(this.extent, this.limit.STRIP_NBT);
+                    queue.addProcessor((IBatchProcessor) this.extent);
                 }
             }
             if (this.limit != null && !this.limit.isUnlimited()) {
                 Set<String> limitBlocks = new HashSet<>();
-                if ((getActor() == null || getActor().hasPermission("worldedit.anyblock")) && this.limit.UNIVERSAL_DISALLOWED_BLOCKS) {
+                if (getActor() != null && !getActor().hasPermission("worldedit.anyblock") && this.limit.UNIVERSAL_DISALLOWED_BLOCKS) {
                     limitBlocks.addAll(WorldEdit.getInstance().getConfiguration().disallowedBlocks);
                 }
                 if (this.limit.DISALLOWED_BLOCKS != null && !this.limit.DISALLOWED_BLOCKS.isEmpty()) {
@@ -613,10 +613,9 @@ public final class EditSessionBuilder {
                 }
                 Set<PropertyRemap<?>> remaps = this.limit.REMAP_PROPERTIES;
                 if (!limitBlocks.isEmpty() || (remaps != null && !remaps.isEmpty())) {
+                    this.extent = new DisallowedBlocksExtent(this.extent, limitBlocks, remaps);
                     if (placeChunks) {
-                        queue.addProcessor(new DisallowedBlocksExtent(this.extent, limitBlocks, remaps));
-                    } else {
-                        this.extent = new DisallowedBlocksExtent(this.extent, limitBlocks, remaps);
+                        queue.addProcessor((IBatchProcessor) this.extent);
                     }
                 }
             }

worldedit-core/src/main/java/com/sk89q/worldedit/command/BiomeCommands.java

@@ -82,7 +82,10 @@ public class BiomeCommands {
             aliases = {"biomels", "/biomelist", "/listbiomes"},
             desc = "Gets all biomes available."
     )
-    @CommandPermissions("worldedit.biome.list")
+    @CommandPermissions(
+            value = "worldedit.biome.list",
+            queued = false
+    )
     public void biomeList(
             Actor actor,
             @ArgFlag(name = 'p', desc = "Page number.", def = "1")

worldedit-core/src/main/java/com/sk89q/worldedit/command/BrushCommands.java

@@ -134,6 +134,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.file.FileSystems;
 import java.util.List;
@@ -310,11 +311,11 @@ public class BrushCommands {
             },
             desc = "Join multiple objects together in a curve",
             descFooter =
-                    "Click to select some objects,click the same block twice to connect the objects.\n"
-                            + "Insufficient brush radius, or clicking the the wrong spot will result in undesired shapes. The shapes must be simple lines or loops.\n"
-                            + "Pic1: http://i.imgur.com/CeRYAoV.jpg -> http://i.imgur.com/jtM0jA4.png\n"
-                            + "Pic2: http://i.imgur.com/bUeyc72.png -> http://i.imgur.com/tg6MkcF.png"
-                            + "Tutorial: https://www.planetminecraft.com/blog/fawe-tutorial/"
+                    """
+                            Click to select some objects,click the same block twice to connect the objects.
+                            Insufficient brush radius, or clicking the the wrong spot will result in undesired shapes. The shapes must be simple lines or loops.
+                            Pic1: http://i.imgur.com/CeRYAoV.jpg -> http://i.imgur.com/jtM0jA4.png
+                            Pic2: http://i.imgur.com/bUeyc72.png -> http://i.imgur.com/tg6MkcF.pngTutorial: https://www.planetminecraft.com/blog/fawe-tutorial/"""
     )
     @CommandPermissions("worldedit.brush.spline")
     public void splineBrush(
@@ -337,9 +338,10 @@ public class BrushCommands {
                     "vaesweep"
             },
             desc = "Sweep your clipboard content along a curve",
-            descFooter = "Sweeps your clipboard content along a curve.\n"
-                    + "Define a curve by selecting the individual points with a brush\n"
-                    + "Set [copies] to a value > 0 if you want to have your selection pasted a limited amount of times equally spaced on the curve"
+            descFooter = """
+                    Sweeps your clipboard content along a curve.
+                    Define a curve by selecting the individual points with a brush
+                    Set [copies] to a value > 0 if you want to have your selection pasted a limited amount of times equally spaced on the curve"""
     )
     @CommandPermissions("worldedit.brush.sweep")
     public void sweepBrush(
@@ -520,11 +522,9 @@ public class BrushCommands {
             @Switch(name = 'a', desc = "Use image Alpha") boolean alpha,
             @Switch(name = 'f', desc = "Blend the image with existing terrain") boolean fadeOut
     )
-            throws WorldEditException, IOException {
+            throws WorldEditException, IOException, URISyntaxException {
         URL url = new URL(imageURL);
-        if (!url.getHost().equalsIgnoreCase("i.imgur.com")) {
-            throw new IOException("Only i.imgur.com links are allowed!");
-        }
+        MainUtil.checkImageHost(url.toURI());
         BufferedImage image = MainUtil.readImage(url);
         worldEdit.checkMaxBrushRadius(radius);
         if (yscale != 1) {
@@ -636,10 +636,10 @@ public class BrushCommands {
     @Command(
             name = "layer",
             desc = "Replaces terrain with a layer.",
-            descFooter = "Replaces terrain with a layer.\n"
-                    + "Example: /br layer 5 oak_planks,orange_stained_glass,magenta_stained_glass,black_wool - Places several " +
-                    "layers on a surface\n"
-                    + "Pic: https://i.imgur.com/XV0vYoX.png"
+            descFooter = """
+                    Replaces terrain with a layer.
+                    Example: /br layer 5 oak_planks,orange_stained_glass,magenta_stained_glass,black_wool - Places several layers on a surface
+                    Pic: https://i.imgur.com/XV0vYoX.png"""
     )
     @CommandPermissions("worldedit.brush.layer")
     public void surfaceLayer(
@@ -658,11 +658,11 @@ public class BrushCommands {
     @Command(
             name = "splatter",
             desc = "Splatter a pattern on a surface",
-            descFooter = "Sets a bunch of blocks randomly on a surface.\n"
-                    + "Pic: https://i.imgur.com/hMD29oO.png\n"
-                    + "Example: /br splatter stone,dirt 30 15\n"
-                    + "Note: The seeds define how many splotches there are, recursion defines how large, "
-                    + "solid defines whether the pattern is applied per seed, else per block."
+            descFooter = """
+                    Sets a bunch of blocks randomly on a surface.
+                    Pic: https://i.imgur.com/hMD29oO.png
+                    Example: /br splatter stone,dirt 30 15
+                    Note: The seeds define how many splotches there are, recursion defines how large, solid defines whether the pattern is applied per seed, else per block."""
     )
     @CommandPermissions("worldedit.brush.splatter")
     public void splatterBrush(
@@ -691,9 +691,10 @@ public class BrushCommands {
                     "scommand"
             },
             desc = "Run commands at random points on a surface",
-            descFooter = "Run commands at random points on a surface\n"
-                    + " - Your selection will be expanded to the specified size around each point\n"
-                    + " - Placeholders: {x}, {y}, {z}, {world}, {size}"
+            descFooter = """
+                    Run commands at random points on a surface
+                     - Your selection will be expanded to the specified size around each point
+                     - Placeholders: {x}, {y}, {z}, {world}, {size}"""
     )
     @CommandPermissions("worldedit.brush.scattercommand")
     public void scatterCommandBrush(
@@ -723,9 +724,10 @@ public class BrushCommands {
             name = "height",
             aliases = {"heightmap"},
             desc = "Raise or lower terrain using a heightmap",
-            descFooter = "This brush raises and lowers land.\n"
-                    + "Note: Use a negative yscale to reduce height\n"
-                    + "Snow Pic: https://i.imgur.com/Hrzn0I4.png"
+            descFooter = """
+                    This brush raises and lowers land.
+                    Note: Use a negative yscale to reduce height
+                    Snow Pic: https://i.imgur.com/Hrzn0I4.png"""
     )
     @CommandPermissions("worldedit.brush.height")
     public void heightBrush(
@@ -890,9 +892,11 @@ public class BrushCommands {
                     "copypasta"
             },
             desc = "Copy Paste brush",
-            descFooter = "Left click the base of an object to copy.\n" + "Right click to paste\n"
-                    + "Note: Works well with the clipboard scroll action\n"
-                    + "Video: https://www.youtube.com/watch?v=RPZIaTbqoZw"
+            descFooter = """
+                    Left click the base of an object to copy.
+                    Right click to paste
+                    Note: Works well with the clipboard scroll action
+                    Video: https://www.youtube.com/watch?v=RPZIaTbqoZw"""
     )
     @CommandPermissions("worldedit.brush.copy")
     public void copy(
@@ -914,9 +918,10 @@ public class BrushCommands {
             name = "command",
             aliases = {"cmd"},
             desc = "Command brush",
-            descFooter = "Run the commands at the clicked position.\n"
-                    + " - Your selection will be expanded to the specified size around each point\n"
-                    + " - Placeholders: {x}, {y}, {z}, {world}, {size}"
+            descFooter = """
+                    Run the commands at the clicked position.
+                     - Your selection will be expanded to the specified size around each point
+                     - Placeholders: {x}, {y}, {z}, {world}, {size}"""
     )
     @CommandPermissions("worldedit.brush.command")
     public void command(
@@ -1036,7 +1041,7 @@ public class BrushCommands {
     )
             throws WorldEditException {
         WorldEdit.getInstance().checkMaxBrushRadius(radius);
-        BrushTool tool = session.getBrushTool(player.getItemInHand(HandSide.MAIN_HAND).getType());
+        BrushTool tool = session.getBrushTool(player);
         tool.setSize(radius);
         tool.setFill(null);
         tool.setBrush(new OperationFactoryBrush(factory, shape, session), permission);
@@ -1196,17 +1201,12 @@ public class BrushCommands {
             brush = new HollowSphereBrush();
         } else {
             //FAWE start - Suggest different brush material if sand or gravel is used
-            if (pattern instanceof BlockStateHolder) {
-                BlockType type = ((BlockStateHolder) pattern).getBlockType();
-                switch (type.getId()) {
-                    case "minecraft:sand":
-                    case "minecraft:gravel":
-                        player.print(
-                                Caption.of("fawe.worldedit.brush.brush.try.other"));
-                        falling = true;
-                        break;
-                    default:
-                        break;
+            if (pattern instanceof BlockStateHolder<?> holder) {
+                BlockType type = holder.getBlockType();
+                if (type == BlockTypes.SAND || type == BlockTypes.GRAVEL) {
+                    player.print(
+                            Caption.of("fawe.worldedit.brush.brush.try.other"));
+                    falling = true;
                 }
             }
             if (falling) {
@@ -1258,13 +1258,12 @@ public class BrushCommands {
 
     @Command(
             name = "clipboard",
-            desc = "@Deprecated use instead: `/br copypaste`)",
+            desc = "Paste your clipboard at the brush location. Includes any transforms.",
             descFooter = "Choose the clipboard brush.\n"
                     + "Without the -o flag, the paste will appear centered at the target location. "
                     + "With the flag, then the paste will appear relative to where you had "
                     + "stood relative to the copied area when you copied it."
     )
-    @Deprecated
     @CommandPermissions("worldedit.brush.clipboard")
     public void clipboardBrush(
             Player player, LocalSession session,
@@ -1278,7 +1277,11 @@ public class BrushCommands {
                     boolean pasteBiomes,
             @ArgFlag(name = 'm', desc = "Skip blocks matching this mask in the clipboard")
             @ClipboardMask
-                    Mask sourceMask, InjectedValueAccess context
+                    Mask sourceMask, InjectedValueAccess context,
+            //FAWE start - random rotation
+            @Switch(name = 'r', desc = "Apply random rotation on paste, combines with existing clipboard transforms")
+                    boolean randomRotate
+            //FAWE end
     ) throws WorldEditException {
         ClipboardHolder holder = session.getClipboard();
 
@@ -1294,9 +1297,9 @@ public class BrushCommands {
 
         set(
                 context,
-                new ClipboardBrush(newHolder, ignoreAir, usingOrigin, pasteEntities, pasteBiomes,
-                        sourceMask
-                ),
+                //FAWE start - random rotation
+                new ClipboardBrush(newHolder, ignoreAir, usingOrigin, pasteEntities, pasteBiomes, sourceMask, randomRotate),
+                //FAWE end
                 "worldedit.brush.clipboard"
         );
     }
@@ -1361,7 +1364,7 @@ public class BrushCommands {
         iterations = Math.min(limit.MAX_ITERATIONS, iterations);
         //FAWE end
 
-        set(context, new SnowSmoothBrush(iterations, mask), "worldedit.brush.snowsmooth").setSize(radius);
+        set(context, new SnowSmoothBrush(iterations, snowBlockCount, mask), "worldedit.brush.snowsmooth").setSize(radius);
         player.print(Caption.of(
                 "worldedit.brush.smooth.equip",
                 radius,

worldedit-core/src/main/java/com/sk89q/worldedit/command/ChunkCommands.java

@@ -79,7 +79,10 @@ public class ChunkCommands {
             aliases = {"/chunkinfo"},
             desc = "Get information about the chunk you're inside"
     )
-    @CommandPermissions("worldedit.chunkinfo")
+    @CommandPermissions(
+            value = "worldedit.chunkinfo",
+            queued = false
+    )
     public void chunkInfo(Player player) {
         Location pos = player.getBlockLocation();
         int chunkX = (int) Math.floor(pos.getBlockX() / 16.0);
@@ -99,7 +102,10 @@ public class ChunkCommands {
             aliases = {"/listchunks"},
             desc = "List chunks that your selection includes"
     )
-    @CommandPermissions("worldedit.listchunks")
+    @CommandPermissions(
+            value = "worldedit.listchunks",
+            queued = false
+    )
     public void listChunks(
             Actor actor, World world, LocalSession session,
             @ArgFlag(name = 'p', desc = "Page number.", def = "1") int page

worldedit-core/src/main/java/com/sk89q/worldedit/command/ClipboardCommands.java

@@ -74,6 +74,7 @@ import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.regions.RegionIntersection;
 import com.sk89q.worldedit.regions.RegionSelector;
 import com.sk89q.worldedit.regions.selector.CuboidRegionSelector;
+import com.sk89q.worldedit.regions.selector.ExtendingCuboidRegionSelector;
 import com.sk89q.worldedit.session.ClipboardHolder;
 import com.sk89q.worldedit.util.formatting.text.Component;
 import com.sk89q.worldedit.util.formatting.text.TextComponent;
@@ -159,35 +160,7 @@ public class ClipboardCommands {
                 session.getPlacementPosition(actor));
         ForwardExtentCopy copy = new ForwardExtentCopy(editSession, region, clipboard, region.getMinimumPoint());
         copy.setCopyingEntities(copyEntities);
-        copy.setCopyingBiomes(copyBiomes);
-
-        Mask sourceMask = editSession.getSourceMask();
-        Region[] regions = editSession.getAllowedRegions();
-        Region allowedRegion;
-        if (regions == null || regions.length == 0) {
-            allowedRegion = new NullRegion();
-        } else {
-            allowedRegion = new RegionIntersection(regions);
-        }
-        final Mask firstSourceMask = mask != null ? mask : sourceMask;
-        final Mask finalMask = MaskIntersection.of(firstSourceMask, new RegionMask(allowedRegion)).optimize();
-        if (finalMask != Masks.alwaysTrue()) {
-            copy.setSourceMask(finalMask);
-        }
-        if (sourceMask != null) {
-            editSession.setSourceMask(null);
-            new MaskTraverser(sourceMask).reset(editSession);
-            editSession.setSourceMask(null);
-        }
-
-        try {
-            Operations.completeLegacy(copy);
-        } catch (Throwable e) {
-            throw e;
-        } finally {
-            clipboard.flush();
-        }
-        session.setClipboard(new ClipboardHolder(clipboard));
+        createCopy(session, editSession, copyBiomes, mask, clipboard, copy);
 
         copy.getStatusMessages().forEach(actor::print);
         //FAWE end
@@ -298,7 +271,25 @@ public class ClipboardCommands {
         copy.setSourceFunction(new BlockReplace(editSession, leavePattern));
         copy.setCopyingEntities(copyEntities);
         copy.setRemovingEntities(true);
+        createCopy(session, editSession, copyBiomes, mask, clipboard, copy);
+
+        if (!actor.hasPermission("fawe.tips")) {
+            actor.print(Caption.of("fawe.tips.tip.lazycut"));
+        }
+        copy.getStatusMessages().forEach(actor::print);
+        //FAWE end
+    }
+
+    private void createCopy(
+            final LocalSession session,
+            final EditSession editSession,
+            final boolean copyBiomes,
+            final Mask mask,
+            final Clipboard clipboard,
+            final ForwardExtentCopy copy
+    ) {
         copy.setCopyingBiomes(copyBiomes);
+
         Mask sourceMask = editSession.getSourceMask();
         Region[] regions = editSession.getAllowedRegions();
         Region allowedRegion;
@@ -317,20 +308,13 @@ public class ClipboardCommands {
             new MaskTraverser(sourceMask).reset(editSession);
             editSession.setSourceMask(null);
         }
+
         try {
             Operations.completeLegacy(copy);
-        } catch (Throwable e) {
-            throw e;
         } finally {
             clipboard.flush();
         }
         session.setClipboard(new ClipboardHolder(clipboard));
-
-        if (!actor.hasPermission("fawe.tips")) {
-            actor.print(Caption.of("fawe.tips.tip.lazycut"));
-        }
-        copy.getStatusMessages().forEach(actor::print);
-        //FAWE end
     }
 
     @Command(
@@ -444,7 +428,12 @@ public class ClipboardCommands {
             Vector3 max = realTo.add(holder
                     .getTransform()
                     .apply(region.getMaximumPoint().subtract(region.getMinimumPoint()).toVector3()));
-            RegionSelector selector = new CuboidRegionSelector(world, realTo.toBlockPoint(), max.toBlockPoint());
+            final CuboidRegionSelector selector;
+            if (session.getRegionSelector(world) instanceof ExtendingCuboidRegionSelector) {
+                selector = new ExtendingCuboidRegionSelector(world, realTo.toBlockPoint(), max.toBlockPoint());
+            } else {
+                selector = new CuboidRegionSelector(world, realTo.toBlockPoint(), max.toBlockPoint());
+            }
             session.setRegionSelector(world, selector);
             selector.learnChanges();
             selector.explainRegionAdjust(actor, session);
@@ -475,9 +464,10 @@ public class ClipboardCommands {
     @Command(
             name = "/rotate",
             desc = "Rotate the contents of the clipboard",
-            descFooter = "Non-destructively rotate the contents of the clipboard.\n"
-                    + "Angles are provided in degrees and a positive angle will result in a clockwise rotation. "
-                    + "Multiple rotations can be stacked. Interpolation is not performed so angles should be a multiple of 90 degrees.\n"
+            descFooter = """
+                    Non-destructively rotate the contents of the clipboard.
+                    Angles are provided in degrees and a positive angle will result in a clockwise rotation. Multiple rotations can be stacked. Interpolation is not performed so angles should be a multiple of 90 degrees.
+                    """
     )
     @CommandPermissions("worldedit.clipboard.rotate")
     public void rotate(

worldedit-core/src/main/java/com/sk89q/worldedit/command/GeneralCommands.java

@@ -149,14 +149,11 @@ public class GeneralCommands {
         String arg0 = args.get(0).toLowerCase(Locale.ENGLISH);
         String flipped;
         switch (arg0) {
-            case "on":
-                flipped = "off";
-                break;
-            case "off":
-                flipped = "on";
-                break;
-            default:
+            case "on" -> flipped = "off";
+            case "off" -> flipped = "on";
+            default -> {
                 return TextComponent.of("There is no replacement for //fast " + arg0);
+            }
         }
         return CommandUtil.createNewCommandReplacementText("//perf " + flipped);
     }
@@ -362,7 +359,10 @@ public class GeneralCommands {
             descFooter = "This is dependent on platform implementation. " +
                     "Not all platforms support watchdog hooks, or contain a watchdog."
     )
-    @CommandPermissions("worldedit.watchdog")
+    @CommandPermissions(
+            value = "worldedit.watchdog",
+            queued = false
+    )
     public void watchdog(
             Actor actor, LocalSession session,
             @Arg(desc = "The mode to set the watchdog hook to", def = "")
@@ -424,7 +424,10 @@ public class GeneralCommands {
             aliases = {"/searchitem", "/l", "/search"},
             desc = "Search for an item"
     )
-    @CommandPermissions("worldedit.searchitem")
+    @CommandPermissions(
+            value = "worldedit.searchitem",
+            queued = false
+    )
     public void searchItem(
             Actor actor,
             @Switch(name = 'b', desc = "Only search for blocks")
@@ -573,7 +576,10 @@ public class GeneralCommands {
             aliases = {"tips"},
             desc = "Toggle FAWE tips"
     )
-    @CommandPermissions("fawe.tips")
+    @CommandPermissions(
+            value = "fawe.tips",
+            queued = false
+    )
     public void tips(Actor actor, LocalSession session) throws WorldEditException {
         if (actor.togglePermission("fawe.tips")) {
             actor.print(Caption.of("fawe.info.worldedit.toggle.tips.on"));
@@ -627,7 +633,6 @@ public class GeneralCommands {
             String command = "/searchitem " + (blocksOnly ? "-b " : "") + (itemsOnly ? "-i " : "") + "-p %page% " + search;
             Map<String, Component> results = new TreeMap<>();
             String idMatch = search.replace(' ', '_');
-            String nameMatch = search.toLowerCase(Locale.ROOT);
             for (ItemType searchType : ItemType.REGISTRY) {
                 if (blocksOnly && !searchType.hasBlockType()) {
                     continue;

worldedit-core/src/main/java/com/sk89q/worldedit/command/GenerationCommands.java

@@ -65,6 +65,7 @@ import org.jetbrains.annotations.Range;
 import java.awt.RenderingHints;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
@@ -119,18 +120,15 @@ public class GenerationCommands {
         final double radiusX;
         final double radiusZ;
         switch (radii.size()) {
-            case 1:
-                radiusX = radiusZ = Math.max(1, radii.get(0));
-                break;
-
-            case 2:
+            case 1 -> radiusX = radiusZ = Math.max(1, radii.get(0));
+            case 2 -> {
                 radiusX = Math.max(1, radii.get(0));
                 radiusZ = Math.max(1, radii.get(1));
-                break;
-
-            default:
+            }
+            default -> {
                 actor.print(Caption.of("worldedit.cyl.invalid-radius"));
                 return 0;
+            }
         }
         worldEdit.checkMaxRadius(radiusX);
         worldEdit.checkMaxRadius(radiusZ);
@@ -169,18 +167,15 @@ public class GenerationCommands {
         final double radiusX;
         final double radiusZ;
         switch (radii.size()) {
-            case 1:
-                radiusX = radiusZ = Math.max(1, radii.get(0));
-                break;
-
-            case 2:
+            case 1 -> radiusX = radiusZ = Math.max(1, radii.get(0));
+            case 2 -> {
                 radiusX = Math.max(1, radii.get(0));
                 radiusZ = Math.max(1, radii.get(1));
-                break;
-
-            default:
+            }
+            default -> {
                 actor.print(Caption.of("worldedit.cyl.invalid-radius"));
                 return 0;
+            }
         }
 
         worldEdit.checkMaxRadius(radiusX);
@@ -234,19 +229,16 @@ public class GenerationCommands {
         final double radiusY;
         final double radiusZ;
         switch (radii.size()) {
-            case 1:
-                radiusX = radiusY = radiusZ = Math.max(0, radii.get(0));
-                break;
-
-            case 3:
+            case 1 -> radiusX = radiusY = radiusZ = Math.max(0, radii.get(0));
+            case 3 -> {
                 radiusX = Math.max(0, radii.get(0));
                 radiusY = Math.max(0, radii.get(1));
                 radiusZ = Math.max(0, radii.get(2));
-                break;
-
-            default:
+            }
+            default -> {
                 actor.print(Caption.of("worldedit.sphere.invalid-radius"));
                 return 0;
+            }
         }
 
         worldEdit.checkMaxRadius(radiusX);
@@ -437,9 +429,10 @@ public class GenerationCommands {
             name = "/generatebiome",
             aliases = {"/genbiome", "/gb"},
             desc = "Sets biome according to a formula.",
-            descFooter = "Formula must return positive numbers (true) if the point is inside the shape\n"
-                    + "Sets the biome of blocks in that shape.\n"
-                    + "For details, see https://ehub.to/we/expr"
+            descFooter = """
+                    Formula must return positive numbers (true) if the point is inside the shape
+                    Sets the biome of blocks in that shape.
+                    For details, see https://ehub.to/we/expr"""
     )
     @CommandPermissions("worldedit.generation.shape.biome")
     @Logging(ALL)
@@ -588,12 +581,10 @@ public class GenerationCommands {
             @Arg(desc = "boolean", def = "true") boolean randomize,
             @Arg(desc = "TODO", def = "100") int threshold,
             @Arg(desc = "BlockVector2", def = "") BlockVector2 dimensions
-    ) throws WorldEditException, IOException {
+    ) throws WorldEditException, IOException, URISyntaxException {
         TextureUtil tu = Fawe.instance().getCachedTextureUtil(randomize, 0, threshold);
         URL url = new URL(imageURL);
-        if (!url.getHost().equalsIgnoreCase("i.imgur.com")) {
-            throw new IOException("Only i.imgur.com links are allowed!");
-        }
+        MainUtil.checkImageHost(url.toURI());
         if (dimensions != null) {
             checkCommandArgument(
                     (long) dimensions.getX() * dimensions.getZ() <= Settings.settings().WEB.MAX_IMAGE_SIZE,
@@ -626,14 +617,12 @@ public class GenerationCommands {
         BlockVector3 pos1 = session.getPlacementPosition(actor);
         BlockVector3 pos2 = pos1.add(image.getWidth() - 1, 0, image.getHeight() - 1);
         CuboidRegion region = new CuboidRegion(pos1, pos2);
-        int[] count = new int[1];
         final BufferedImage finalImage = image;
         RegionVisitor visitor = new RegionVisitor(region, pos -> {
             int x = pos.getBlockX() - pos1.getBlockX();
             int z = pos.getBlockZ() - pos1.getBlockZ();
             int color = finalImage.getRGB(x, z);
             BlockType block = tu.getNearestBlock(color);
-            count[0]++;
             if (block != null) {
                 return editSession.setBlock(pos, block.getDefaultState());
             }

worldedit-core/src/main/java/com/sk89q/worldedit/command/HistorySubCommands.java

@@ -223,7 +223,10 @@ public class HistorySubCommands {
             aliases = {"summary", "summarize"},
             desc = "Summarize an edit"
     )
-    @CommandPermissions("worldedit.history.info")
+    @CommandPermissions(
+            value = "worldedit.history.info",
+            queued = false
+    )
     public synchronized void summary(
             Player player, RollbackDatabase database, Arguments arguments,
             @Arg(desc = "Player uuid/name")
@@ -314,8 +317,7 @@ public class HistorySubCommands {
                     public Component apply(@Nullable Supplier<? extends ChangeSet> input) {
                         ChangeSet edit = input.get();
 
-                        if (edit instanceof RollbackOptimizedHistory) {
-                            RollbackOptimizedHistory rollback = (RollbackOptimizedHistory) edit;
+                        if (edit instanceof RollbackOptimizedHistory rollback) {
 
                             UUID uuid = rollback.getUUID();
                             int index = rollback.getIndex();
@@ -368,7 +370,10 @@ public class HistorySubCommands {
             aliases = {"inspect", "search", "near"},
             desc = "Find nearby edits"
     )
-    @CommandPermissions("worldedit.history.find")
+    @CommandPermissions(
+            value = "worldedit.history.find",
+            queued = false
+    )
     public synchronized void find(
             Player player, World world, RollbackDatabase database, Arguments arguments,
             @ArgFlag(name = 'u', def = "", desc = "String user")
@@ -429,7 +434,10 @@ public class HistorySubCommands {
             aliases = {"distribution"},
             desc = "View block distribution for an edit"
     )
-    @CommandPermissions("worldedit.history.distr")
+    @CommandPermissions(
+            value = "worldedit.history.distr",
+            queued = false
+    )
     public void distr(
             Player player, LocalSession session, RollbackDatabase database, Arguments arguments,
             @Arg(desc = "Player uuid/name")
@@ -468,7 +476,10 @@ public class HistorySubCommands {
             name = "list",
             desc = "List your history"
     )
-    @CommandPermissions("worldedit.history.list")
+    @CommandPermissions(
+            value = "worldedit.history.list",
+            queued = false
+    )
     public void list(
             Player player, LocalSession session, RollbackDatabase database, Arguments arguments,
             @Arg(desc = "Player uuid/name")
@@ -476,7 +487,6 @@ public class HistorySubCommands {
             @ArgFlag(name = 'p', desc = "Page to view.", def = "")
                     Integer page
     ) {
-        int index = session.getHistoryIndex();
         List<Supplier<? extends ChangeSet>> history = Lists.transform(
                 session.getHistory(),
                 (Function<ChangeSet, Supplier<ChangeSet>>) input -> () -> input

worldedit-core/src/main/java/com/sk89q/worldedit/command/NavigationCommands.java

@@ -60,7 +60,10 @@ public class NavigationCommands {
             aliases = {"!", "/unstuck"},
             desc = "Escape from being stuck inside a block"
     )
-    @CommandPermissions("worldedit.navigation.unstuck")
+    @CommandPermissions(
+            value = "worldedit.navigation.unstuck",
+            queued = false
+    )
     public void unstuck(Player player) throws WorldEditException {
         player.findFreePosition();
         player.print(Caption.of("worldedit.unstuck.moved"));
@@ -71,7 +74,10 @@ public class NavigationCommands {
             aliases = {"asc", "/asc", "/ascend"},
             desc = "Go up a floor"
     )
-    @CommandPermissions("worldedit.navigation.ascend")
+    @CommandPermissions(
+            value = "worldedit.navigation.ascend",
+            queued = false
+    )
     public void ascend(
             Player player,
             @Arg(desc = "# of levels to ascend", def = "1")
@@ -102,7 +108,10 @@ public class NavigationCommands {
             aliases = {"desc", "/desc", "/descend"},
             desc = "Go down a floor"
     )
-    @CommandPermissions("worldedit.navigation.descend")
+    @CommandPermissions(
+            value = "worldedit.navigation.descend",
+            queued = false
+    )
     public void descend(
             Player player,
             @Arg(desc = "# of levels to descend", def = "1")
@@ -159,7 +168,10 @@ public class NavigationCommands {
             aliases = {"/thru"},
             desc = "Pass through walls"
     )
-    @CommandPermissions("worldedit.navigation.thru.command")
+    @CommandPermissions(
+            value = "worldedit.navigation.thru.command",
+            queued = false
+    )
     public void thru(Player player) throws WorldEditException {
         if (player.passThroughForwardWall(6)) {
             player.print(Caption.of("worldedit.thru.moved"));
@@ -173,7 +185,10 @@ public class NavigationCommands {
             aliases = {"j", "/jumpto", "/j"},
             desc = "Teleport to a location"
     )
-    @CommandPermissions("worldedit.navigation.jumpto.command")
+    @CommandPermissions(
+            value = "worldedit.navigation.jumpto.command",
+            queued = false
+    )
     public void jumpTo(
             Player player,
             @Arg(desc = "Location to jump to", def = "")

worldedit-core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java

@@ -140,7 +140,10 @@ public class RegionCommands {
             name = "/test",
             desc = "test region"
     )
-    @CommandPermissions("worldedit.region.test")
+    @CommandPermissions(
+            value = "worldedit.region.test",
+            queued = false
+    )
     @Logging(REGION)
     public void test(
             Actor actor, EditSession editSession,
@@ -175,7 +178,10 @@ public class RegionCommands {
             aliases = "/nbt",
             desc = "View nbt info for a block"
     )
-    @CommandPermissions("worldedit.nbtinfo")
+    @CommandPermissions(
+            value = "worldedit.nbtinfo",
+            queued = false
+    )
     public void nbtinfo(Player player, EditSession editSession) {
         Location pos = player.getBlockTrace(128);
         if (pos == null) {
@@ -228,13 +234,12 @@ public class RegionCommands {
             @Switch(name = 'h', desc = "Generate only a shell")
                     boolean shell
     ) throws WorldEditException {
-        if (!(region instanceof CuboidRegion)) {
+        if (!(region instanceof CuboidRegion cuboidregion)) {
             actor.print(Caption.of("worldedit.line.cuboid-only"));
             return 0;
         }
         checkCommandArgument(thickness >= 0, "Thickness must be >= 0");
 
-        CuboidRegion cuboidregion = (CuboidRegion) region;
         BlockVector3 pos1 = cuboidregion.getPos1();
         BlockVector3 pos2 = cuboidregion.getPos2();
         int blocksChanged = editSession.drawLine(pattern, pos1, pos2, thickness, !shell);
@@ -261,13 +266,12 @@ public class RegionCommands {
             @Switch(name = 'h', desc = "Generate only a shell")
                     boolean shell
     ) throws WorldEditException {
-        if (!(region instanceof ConvexPolyhedralRegion)) {
+        if (!(region instanceof ConvexPolyhedralRegion cpregion)) {
             actor.print(Caption.of("worldedit.curve.invalid-type"));
             return 0;
         }
         checkCommandArgument(thickness >= 0, "Thickness must be >= 0");
 
-        ConvexPolyhedralRegion cpregion = (ConvexPolyhedralRegion) region;
         List<BlockVector3> vectors = new ArrayList<>(cpregion.getVertices());
 
         int blocksChanged = editSession.drawSpline(pattern, vectors, 0, 0, 0, 10, thickness, !shell);
@@ -468,7 +472,10 @@ public class RegionCommands {
             desc = "Bypass region restrictions",
             descFooter = "Bypass region restrictions"
     )
-    @CommandPermissions("fawe.admin")
+    @CommandPermissions(
+            value = "fawe.admin",
+            queued = false
+    )
     public void wea(Actor actor) throws WorldEditException {
         if (actor.togglePermission("fawe.bypass")) {
             actor.print(Caption.of("fawe.info.worldedit.bypassed"));
@@ -697,7 +704,7 @@ public class RegionCommands {
             actor.print(Caption.of("fawe.regen.time"));
             //FAWE end
             RegenOptions options = RegenOptions.builder()
-                    .seed(!randomSeed ? seed : new Long(ThreadLocalRandom.current().nextLong()))
+                    .seed(!randomSeed ? seed : Long.valueOf(ThreadLocalRandom.current().nextLong()))
                     .regenBiomes(regenBiomes)
                     .biomeType(biomeType)
                     .build();
@@ -718,9 +725,10 @@ public class RegionCommands {
     @Command(
             name = "/deform",
             desc = "Deforms a selected region with an expression",
-            descFooter = "The expression is executed for each block and is expected\n"
-                    + "to modify the variables x, y and z to point to a new block\n"
-                    + "to fetch. For details, see https://ehub.to/we/expr"
+            descFooter = """
+                    The expression is executed for each block and is expected
+                    to modify the variables x, y and z to point to a new block
+                    to fetch. For details, see https://ehub.to/we/expr"""
     )
     @CommandPermissions("worldedit.region.deform")
     @Logging(ALL)
@@ -794,9 +802,10 @@ public class RegionCommands {
     @Command(
             name = "/hollow",
             desc = "Hollows out the object contained in this selection",
-            descFooter = "Hollows out the object contained in this selection.\n"
-                    + "Optionally fills the hollowed out part with the given block.\n"
-                    + "Thickness is measured in manhattan distance."
+            descFooter = """
+                    Hollows out the object contained in this selection.
+                    Optionally fills the hollowed out part with the given block.
+                    Thickness is measured in manhattan distance."""
     )
     @CommandPermissions("worldedit.region.hollow")
     @Logging(REGION)

worldedit-core/src/main/java/com/sk89q/worldedit/command/SchematicCommands.java

@@ -26,7 +26,6 @@ import com.fastasyncworldedit.core.extent.clipboard.MultiClipboardHolder;
 import com.fastasyncworldedit.core.extent.clipboard.URIClipboardHolder;
 import com.fastasyncworldedit.core.extent.clipboard.io.schematic.MinecraftStructure;
 import com.fastasyncworldedit.core.util.MainUtil;
-import com.google.common.base.Function;
 import com.google.common.collect.Multimap;
 import com.sk89q.worldedit.LocalConfiguration;
 import com.sk89q.worldedit.LocalSession;
@@ -46,6 +45,7 @@ import com.sk89q.worldedit.extent.clipboard.io.ClipboardReader;
 import com.sk89q.worldedit.extent.clipboard.io.ClipboardWriter;
 import com.sk89q.worldedit.function.operation.Operations;
 import com.sk89q.worldedit.internal.util.LogManagerCompat;
+import com.sk89q.worldedit.math.transform.AffineTransform;
 import com.sk89q.worldedit.math.transform.Transform;
 import com.sk89q.worldedit.session.ClipboardHolder;
 import com.sk89q.worldedit.util.formatting.component.ErrorFormat;
@@ -90,6 +90,8 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.UUID;
 import java.util.concurrent.Callable;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.function.Function;
 import java.util.regex.Pattern;
 
 import static com.fastasyncworldedit.core.util.ReflectionUtils.as;
@@ -211,11 +213,9 @@ public class SchematicCommands {
         }
 
         ClipboardHolder clipboard = session.getClipboard();
-        if (clipboard instanceof URIClipboardHolder) {
-            URIClipboardHolder identifiable = (URIClipboardHolder) clipboard;
+        if (clipboard instanceof URIClipboardHolder identifiable) {
             if (identifiable.contains(uri)) {
-                if (identifiable instanceof MultiClipboardHolder) {
-                    MultiClipboardHolder multi = (MultiClipboardHolder) identifiable;
+                if (identifiable instanceof MultiClipboardHolder multi) {
                     multi.remove(uri);
                     if (multi.getHolders().isEmpty()) {
                         session.setClipboard(null);
@@ -317,12 +317,16 @@ public class SchematicCommands {
             @Arg(desc = "File name.")
             String filename,
             @Arg(desc = "Format name.", def = "fast")
-            String formatName
+            String formatName,
+            //FAWE start - random rotation
+            @Switch(name = 'r', desc = "Apply random rotation to the clipboard")
+                    boolean randomRotate
+            //FAWE end
     ) throws FilenameException {
         LocalConfiguration config = worldEdit.getConfiguration();
 
         //FAWE start
-        ClipboardFormat format = null;
+        ClipboardFormat format;
         InputStream in = null;
         try {
             URI uri;
@@ -385,6 +389,12 @@ public class SchematicCommands {
             uri = file.toURI();
 
             format.hold(actor, uri, in);
+            if (randomRotate) {
+                AffineTransform transform = new AffineTransform();
+                int rotate = 90 * ThreadLocalRandom.current().nextInt(4);
+                transform = transform.rotateY(rotate);
+                session.getClipboard().setTransform(transform);
+            }
             actor.print(Caption.of("fawe.worldedit.schematic.schematic.loaded", filename));
         } catch (IllegalArgumentException e) {
             actor.print(Caption.of("worldedit.schematic.unknown-filename", TextComponent.of(filename)));
@@ -515,7 +525,10 @@ public class SchematicCommands {
             aliases = {"listformats", "f"},
             desc = "List available formats"
     )
-    @CommandPermissions("worldedit.schematic.formats")
+    @CommandPermissions(
+            value = "worldedit.schematic.formats",
+            queued = false
+    )
     public void formats(Actor actor) {
         actor.print(Caption.of("worldedit.schematic.formats.title"));
         StringBuilder builder;
@@ -541,7 +554,10 @@ public class SchematicCommands {
             desc = "List saved schematics",
             descFooter = "Note: Format is not fully verified until loading."
     )
-    @CommandPermissions("worldedit.schematic.list")
+    @CommandPermissions(
+            value = "worldedit.schematic.list",
+            queued = false
+    )
     public void list(
             Actor actor, LocalSession session,
             @ArgFlag(name = 'p', desc = "Page to view.", def = "1")
@@ -812,7 +828,6 @@ public class SchematicCommands {
             final String SCHEMATIC_NAME = file.getName();
 
             double oldKbOverwritten = 0;
-            String overwrittenPath = curFilepath;
 
             int numFiles = -1;
             if (checkFilesize) {
@@ -828,10 +843,10 @@ public class SchematicCommands {
                 if (overwrite) {
                     oldKbOverwritten = Files.size(Paths.get(file.getAbsolutePath())) / 1000.0;
                     int iter = 1;
-                    while (new File(overwrittenPath + "." + iter + "." + format.getPrimaryFileExtension()).exists()) {
+                    while (new File(curFilepath + "." + iter + "." + format.getPrimaryFileExtension()).exists()) {
                         iter++;
                     }
-                    file = new File(overwrittenPath + "." + iter + "." + format.getPrimaryFileExtension());
+                    file = new File(curFilepath + "." + iter + "." + format.getPrimaryFileExtension());
                 }
             }
 

worldedit-core/src/main/java/com/sk89q/worldedit/command/SelectionCommands.java

@@ -314,7 +314,10 @@ public class SelectionCommands {
             name = "/wand",
             desc = "Get the wand object"
     )
-    @CommandPermissions("worldedit.wand")
+    @CommandPermissions(
+            value = "worldedit.wand",
+            queued = false
+    )
     public void wand(
             Player player, LocalSession session,
             @Switch(name = 'n', desc = "Get a navigation wand") boolean navWand
@@ -348,7 +351,10 @@ public class SelectionCommands {
             aliases = {"/toggleeditwand"},
             desc = "Remind the user that the wand is now a tool and can be unbound with /tool none."
     )
-    @CommandPermissions("worldedit.wand.toggle")
+    @CommandPermissions(
+            value = "worldedit.wand.toggle",
+            queued = false
+    )
     public void toggleWand(Player player) {
         player.print(
                 Caption.of(
@@ -499,7 +505,10 @@ public class SelectionCommands {
             name = "/size",
             desc = "Get information about the selection"
     )
-    @CommandPermissions("worldedit.selection.size")
+    @CommandPermissions(
+            value = "worldedit.selection.size",
+            queued = false
+    )
     public void size(
             Actor actor, World world, LocalSession session,
             @Switch(name = 'c', desc = "Get clipboard info instead")
@@ -734,6 +743,7 @@ public class SelectionCommands {
                 box.appendCommand("sphere", Caption.of("worldedit.select.sphere.description"), "//sel sphere");
                 box.appendCommand("cyl", Caption.of("worldedit.select.cyl.description"), "//sel cyl");
                 box.appendCommand("convex", Caption.of("worldedit.select.convex.description"), "//sel convex");
+
                 //FAWE start
                 box.appendCommand("polyhedral", Caption.of("fawe.selection.sel.polyhedral"), "//sel polyhedral");
                 box.appendCommand("fuzzy[=<mask>]", Caption.of("fawe.selection.sel.fuzzy-instruction"), "//sel fuzzy[=<mask>]");

worldedit-core/src/main/java/com/sk89q/worldedit/command/SnapshotCommands.java

@@ -98,7 +98,10 @@ public class SnapshotCommands {
             name = "list",
             desc = "List snapshots"
     )
-    @CommandPermissions("worldedit.snapshots.list")
+    @CommandPermissions(
+            value = "worldedit.snapshots.list",
+            queued = false
+    )
     void list(
             Actor actor, World world,
             @ArgFlag(name = 'p', desc = "Page of results to return", def = "1")
@@ -127,8 +130,7 @@ public class SnapshotCommands {
                     TextComponent.of(world.getName())
             ));
 
-            if (config.snapshotDatabase instanceof FileSystemSnapshotDatabase) {
-                FileSystemSnapshotDatabase db = (FileSystemSnapshotDatabase) config.snapshotDatabase;
+            if (config.snapshotDatabase instanceof FileSystemSnapshotDatabase db) {
                 Path root = db.getRoot();
                 if (Files.isDirectory(root)) {
                     WorldEdit.logger.info("No snapshots were found for world '"

worldedit-core/src/main/java/com/sk89q/worldedit/command/SnapshotUtilCommands.java

@@ -95,7 +95,7 @@ public class SnapshotUtilCommands {
         if (snapshotName != null) {
             URI uri = resolveSnapshotName(config, snapshotName);
             Optional<Snapshot> snapOpt = config.snapshotDatabase.getSnapshot(uri);
-            if (!snapOpt.isPresent()) {
+            if (snapOpt.isEmpty()) {
                 actor.print(Caption.of("worldedit.restore.not-available"));
                 return;
             }

worldedit-core/src/main/java/com/sk89q/worldedit/command/ToolUtilCommands.java

@@ -140,7 +140,7 @@ public class ToolUtilCommands {
             @Arg(desc = "The range of the brush")
                     int range
     ) throws WorldEditException {
-        session.getBrushTool(player.getItemInHand(HandSide.MAIN_HAND).getType()).setRange(range);
+        session.getBrushTool(player).setRange(range);
         player.print(Caption.of("worldedit.tool.range.set"));
     }
 
@@ -156,7 +156,7 @@ public class ToolUtilCommands {
     ) throws WorldEditException {
         we.checkMaxBrushRadius(size);
 
-        session.getBrushTool(player.getItemInHand(HandSide.MAIN_HAND).getType()).setSize(size);
+        session.getBrushTool(player).setSize(size);
         player.print(Caption.of("worldedit.tool.size.set"));
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java

@@ -29,7 +29,6 @@ import com.fastasyncworldedit.core.util.StringMan;
 import com.fastasyncworldedit.core.util.TaskManager;
 import com.fastasyncworldedit.core.util.image.ImageUtil;
 import com.fastasyncworldedit.core.util.task.DelegateConsumer;
-import com.google.common.base.Function;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.IncompleteRegionException;
 import com.sk89q.worldedit.LocalConfiguration;
@@ -98,6 +97,7 @@ import java.util.Locale;
 import java.util.Map;
 import java.util.UUID;
 import java.util.function.Consumer;
+import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
@@ -130,7 +130,10 @@ public class UtilityCommands {
             aliases = {"/hmi", "hmi"},
             desc = "Generate the heightmap interface: https://github.com/IntellectualSites/HeightMap"
     )
-    @CommandPermissions("fawe.admin")
+    @CommandPermissions(
+            value = "fawe.admin",
+            queued = false
+    )
     public void heightmapInterface(
             Actor actor,
             @Arg(name = "min", desc = "int", def = "100") int min,
@@ -145,12 +148,9 @@ public class UtilityCommands {
         final int sub = srcFolder.getAbsolutePath().length();
         List<String> images = new ArrayList<>();
         MainUtil.iterateFiles(srcFolder, file -> {
-            switch (file.getName().substring(file.getName().lastIndexOf('.')).toLowerCase(Locale.ROOT)) {
-                case ".png":
-                case ".jpeg":
-                    break;
-                default:
-                    return;
+            String s = file.getName().substring(file.getName().lastIndexOf('.')).toLowerCase(Locale.ROOT);
+            if (!s.equals(".png") && !s.equals(".jpeg")) {
+                return;
             }
             try {
                 String name = file.getAbsolutePath().substring(sub);
@@ -187,7 +187,7 @@ public class UtilityCommands {
         StringBuilder config = new StringBuilder();
         config.append("var images = [\n");
         for (String image : images) {
-            config.append('"' + image.replace(File.separator, "/") + "\",\n");
+            config.append('"').append(image.replace(File.separator, "/")).append("\",\n");
         }
         config.append("];\n");
         config.append("// The low res images (they should all be the same size)\n");
@@ -805,7 +805,10 @@ public class UtilityCommands {
             name = "/help",
             desc = "Displays help for WorldEdit commands"
     )
-    @CommandPermissions("worldedit.help")
+    @CommandPermissions(
+            value = "worldedit.help",
+            queued = false
+    )
     public void help(
             Actor actor,
             @Switch(name = 's', desc = "List sub-commands of the given command, if applicable")
@@ -859,7 +862,6 @@ public class UtilityCommands {
             URI uri = input.getKey();
             String path = input.getValue();
 
-            boolean url = false;
             boolean loaded = isLoaded.apply(uri);
 
             URIType type = URIType.FILE;
@@ -959,21 +961,13 @@ public class UtilityCommands {
         if (len > 0) {
             for (String arg : args) {
                 switch (arg.toLowerCase(Locale.ROOT)) {
-                    case "me":
-                    case "mine":
-                    case "local":
-                    case "private":
-                        listMine = true;
-                        break;
-                    case "public":
-                    case "global":
-                        listGlobal = true;
-                        break;
-                    case "all":
+                    case "me", "mine", "local", "private" -> listMine = true;
+                    case "public", "global" -> listGlobal = true;
+                    case "all" -> {
                         listMine = true;
                         listGlobal = true;
-                        break;
-                    default:
+                    }
+                    default -> {
                         if (arg.endsWith("/") || arg.endsWith(File.separator)) {
                             arg = arg.replace("/", File.separator);
                             String newDirFilter = dirFilter + arg;
@@ -995,7 +989,7 @@ public class UtilityCommands {
                         } else {
                             filters.add(arg);
                         }
-                        break;
+                    }
                 }
             }
         }
@@ -1005,7 +999,7 @@ public class UtilityCommands {
 
         List<File> toFilter = new ArrayList<>();
         if (!filters.isEmpty()) {
-            forEachFile = new DelegateConsumer<File>(forEachFile) {
+            forEachFile = new DelegateConsumer<>(forEachFile) {
                 @Override
                 public void accept(File file) {
                     toFilter.add(file);
@@ -1015,7 +1009,7 @@ public class UtilityCommands {
 
         if (formatName != null) {
             final ClipboardFormat cf = ClipboardFormats.findByAlias(formatName);
-            forEachFile = new DelegateConsumer<File>(forEachFile) {
+            forEachFile = new DelegateConsumer<>(forEachFile) {
                 @Override
                 public void accept(File file) {
                     if (cf.isFormat(file)) {
@@ -1024,7 +1018,7 @@ public class UtilityCommands {
                 }
             };
         } else {
-            forEachFile = new DelegateConsumer<File>(forEachFile) {
+            forEachFile = new DelegateConsumer<>(forEachFile) {
                 @Override
                 public void accept(File file) {
                     if (!file.toString().endsWith(".cached")) {
@@ -1062,7 +1056,7 @@ public class UtilityCommands {
             }
             if (listGlobal) {
                 File rel = MainUtil.resolveRelative(new File(dir, dirFilter));
-                forEachFile = new DelegateConsumer<File>(forEachFile) {
+                forEachFile = new DelegateConsumer<>(forEachFile) {
                     @Override
                     public void accept(File f) {
                         try {
@@ -1172,7 +1166,7 @@ public class UtilityCommands {
         StringBuilder name = new StringBuilder();
         if (relative.isAbsolute()) {
             relative = root.toURI().relativize(file.toURI());
-            name.append(".." + File.separator);
+            name.append("..").append(File.separator);
         }
         name.append(relative.getPath());
         return name.toString();

worldedit-core/src/main/java/com/sk89q/worldedit/command/tool/brush/ClipboardBrush.java

@@ -27,9 +27,13 @@ import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.function.operation.Operations;
 import com.sk89q.worldedit.function.pattern.Pattern;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.math.transform.AffineTransform;
+import com.sk89q.worldedit.math.transform.Transform;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.session.ClipboardHolder;
 
+import java.util.concurrent.ThreadLocalRandom;
+
 public class ClipboardBrush implements Brush {
 
     private final ClipboardHolder holder;
@@ -38,6 +42,9 @@ public class ClipboardBrush implements Brush {
     private final boolean pasteEntities;
     private final boolean pasteBiomes;
     private final Mask sourceMask;
+    //FAWE start - random rotation
+    private final boolean randomRotate;
+    //FAWE end
 
     public ClipboardBrush(ClipboardHolder holder, boolean ignoreAirBlocks, boolean usingOrigin) {
         this.holder = holder;
@@ -46,23 +53,48 @@ public class ClipboardBrush implements Brush {
         this.pasteBiomes = false;
         this.pasteEntities = false;
         this.sourceMask = null;
+        //FAWE start - random rotation
+        this.randomRotate = false;
+        //FAWE end
     }
 
     public ClipboardBrush(
             ClipboardHolder holder, boolean ignoreAirBlocks, boolean usingOrigin, boolean pasteEntities,
             boolean pasteBiomes, Mask sourceMask
     ) {
+        //FAWE start - random rotation
+        this(holder, ignoreAirBlocks, usingOrigin, pasteEntities, pasteBiomes, sourceMask, false);
+    }
+
+    public ClipboardBrush(
+            ClipboardHolder holder, boolean ignoreAirBlocks, boolean usingOrigin, boolean pasteEntities,
+            boolean pasteBiomes, Mask sourceMask, boolean randomRotate
+    ) {
+        //FAWE end
         this.holder = holder;
         this.ignoreAirBlocks = ignoreAirBlocks;
         this.usingOrigin = usingOrigin;
         this.pasteEntities = pasteEntities;
         this.pasteBiomes = pasteBiomes;
         this.sourceMask = sourceMask;
+        this.randomRotate = randomRotate;
     }
 
     @Override
     public void build(EditSession editSession, BlockVector3 position, Pattern pattern, double size) throws
             MaxChangedBlocksException {
+        //FAWE start - random rotation
+        Transform originalTransform = holder.getTransform();
+        Transform transform = new AffineTransform();
+        if (this.randomRotate) {
+            int rotate = 90 * ThreadLocalRandom.current().nextInt(4);
+            transform = ((AffineTransform) transform).rotateY(rotate);
+            if (originalTransform != null) {
+                transform = originalTransform.combine(transform);
+            }
+        }
+        holder.setTransform(transform);
+        //FAWE end
         Clipboard clipboard = holder.getClipboard();
         Region region = clipboard.getRegion();
         BlockVector3 centerOffset = region.getCenter().toBlockPoint().subtract(clipboard.getOrigin());
@@ -77,6 +109,10 @@ public class ClipboardBrush implements Brush {
                 .build();
 
         Operations.completeLegacy(operation);
+        //FAWE start - random rotation
+        // reset transform
+        holder.setTransform(originalTransform);
+        //FAWE end
     }
 
 }

worldedit-core/src/main/java/com/sk89q/worldedit/command/util/annotation/ConfirmHandler.java

@@ -24,7 +24,7 @@ public class ConfirmHandler implements CommandCallListener {
         }
         Optional<Actor> actorOpt = parameters.injectedValue(Key.of(Actor.class));
 
-        if (!actorOpt.isPresent()) {
+        if (actorOpt.isEmpty()) {
             return;
         }
         Actor actor = actorOpt.get();

worldedit-core/src/main/java/com/sk89q/worldedit/entity/Player.java

@@ -437,14 +437,16 @@ public interface Player extends Entity, Actor {
                     } else {
                         continue;
                     }
-                    WorldEdit.getInstance().getExecutorService().submit(() -> {
+                    Fawe.instance().getClipboardExecutor().submit(getUniqueId(), () -> {
                         doc.close(); // Ensure closed before deletion
                         doc.getFile().delete();
                     });
                 }
             }
-        } else if (Settings.settings().CLIPBOARD.DELETE_ON_LOGOUT || Settings.settings().CLIPBOARD.USE_DISK) {
-            WorldEdit.getInstance().getExecutorService().submit(() -> session.setClipboard(null));
+        } else if (Settings.settings().CLIPBOARD.USE_DISK) {
+            Fawe.instance().getClipboardExecutor().submit(getUniqueId(), () -> session.setClipboard(null));
+        } else if (Settings.settings().CLIPBOARD.DELETE_ON_LOGOUT) {
+            session.setClipboard(null);
         }
         if (Settings.settings().HISTORY.DELETE_ON_LOGOUT) {
             session.clearHistory();
@@ -470,7 +472,10 @@ public interface Player extends Entity, Actor {
                     }
                 } catch (EmptyClipboardException ignored) {
                 }
-                DiskOptimizedClipboard doc = DiskOptimizedClipboard.loadFromFile(file);
+                DiskOptimizedClipboard doc = Fawe.instance().getClipboardExecutor().submit(
+                        getUniqueId(),
+                        () -> DiskOptimizedClipboard.loadFromFile(file)
+                ).get();
                 Clipboard clip = doc.toClipboard();
                 ClipboardHolder holder = new ClipboardHolder(clip);
                 session.setClipboard(holder);

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/PlatformManager.java

@@ -321,10 +321,24 @@ public class PlatformManager {
         return queryCapability(Capability.CONFIGURATION).getConfiguration();
     }
 
+    /**
+     * Get the current supported {@link SideEffect}s.
+     *
+     * @return the supported side effects
+     * @throws NoCapablePlatformException thrown if no platform is capable
+     */
     public Collection<SideEffect> getSupportedSideEffects() {
         return queryCapability(Capability.WORLD_EDITING).getSupportedSideEffects();
     }
 
+    /**
+     * Get the initialized state of the Platform.
+     * {@return if the platform manager is initialized}
+     */
+    public boolean isInitialized() {
+        return initialized.get();
+    }
+
     /**
      * You shouldn't have been calling this anyways, but this is now deprecated. Either don't
      * fire this event at all, or fire the new event via the event bus if you're a platform.

worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/SpongeSchematicReader.java

@@ -266,8 +266,8 @@ public class SpongeSchematicReader extends NBTSchematicReader {
                 if (id == null) {
                     continue;
                 }
+                values.put("id", id);
                 //FAWE end
-                values.put("id", values.get("Id"));
                 values.remove("Id");
                 values.remove("Pos");
                 if (fixer != null) {

worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Functions.java

@@ -75,6 +75,7 @@ public final class Functions {
             );
             handle = handle.asType(handle.type().changeReturnType(Number.class));
             handle = filterReturnValue(handle, DOUBLE_VALUE);
+            handle = handle.asType(handle.type().wrap());
         }
         // return vararg-ity
         if (wasVarargs) {

worldedit-core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java

@@ -31,6 +31,7 @@ import com.fastasyncworldedit.core.queue.IChunkSet;
 import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.block.BlockTypesCache;
 import com.sk89q.worldedit.world.storage.ChunkStore;
 
 import javax.annotation.Nonnull;
@@ -823,14 +824,15 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
             boolean trimX = lowerX != 0 || upperX != 15;
             boolean trimZ = lowerZ != 0 || upperZ != 15;
 
+            if (!(trimX || trimZ)) {
+                return set;
+            }
+
             for (int layer = get.getMinSectionPosition(); layer < get.getMaxSectionPosition(); layer++) {
                 if (!set.hasSection(layer)) {
                     continue;
                 }
                 char[] arr = Objects.requireNonNull(set.loadIfPresent(layer)); // This shouldn't be null if above is true
-                if (!(trimX || trimZ)) {
-                    continue;
-                }
                 int indexY = 0;
                 for (int y = 0; y < 16; y++, indexY += 256) { // For each y layer within a chunk section
                     int index;
@@ -839,14 +841,14 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
                         for (int z = 0; z < lowerZ; z++) {
                             // null the z values
                             for (int x = 0; x < 16; x++, index++) {
-                                arr[index] = 0;
+                                arr[index] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         }
                         index = indexY + upperZi;
                         for (int z = upperZ + 1; z < 16; z++) {
                             // null the z values
                             for (int x = 0; x < 16; x++, index++) {
-                                arr[index] = 0;
+                                arr[index] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         }
                     }
@@ -855,11 +857,11 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
                         for (int z = lowerZ; z <= upperZ; z++, index += 16) {
                             for (int x = 0; x < lowerX; x++) {
                                 // null the x values
-                                arr[index + x] = 0;
+                                arr[index + x] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                             for (int x = upperX + 1; x < 16; x++) {
                                 // null the x values
-                                arr[index + x] = 0;
+                                arr[index + x] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         }
                     }
@@ -925,7 +927,7 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
                         for (int z = lowerZ; z <= upperZ; z++) {
                             // null the z values
                             for (int x = 0; x < 16; x++, index++) {
-                                arr[index] = 0;
+                                arr[index] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         }
                     }
@@ -934,7 +936,7 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
                         for (int z = lowerZ; z <= upperZ; z++, index += 16) {
                             for (int x = lowerX; x <= upperX; x++) {
                                 // null the x values
-                                arr[index + x] = 0;
+                                arr[index + x] = BlockTypesCache.ReservedIDs.__RESERVED__;
                             }
                         }
                     }