From c6ce0c773ffb2032ca63f9ef992740bf4dddc51b Mon Sep 17 00:00:00 2001
From: Jesse Boyd <jessepaleg@gmail.com>
Date: Tue, 23 Apr 2019 23:49:45 +1000
Subject: [PATCH] Fixes #30

---
 .../src/main/java/com/sk89q/worldedit/EditSession.java    | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java b/worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java
index 508c0dd8a..e1202cf06 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java
@@ -530,7 +530,13 @@ public class EditSession extends AbstractDelegateExtent implements HasFaweQueue,
         this.extent = nullExtent;
         bypassAll = nullExtent;
         dequeue();
-        queue.clear();
+        if (!queue.isEmpty()) {
+            if (Fawe.isMainThread()) {
+                queue.clear();
+            } else {
+                SetQueue.IMP.addTask(() -> queue.clear());
+            }
+        }
         return true;
     }