Fix some command parsing issues

Tab complete runs on main thread - that could be an issue

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/v0/BukkitQueue_All.java

@@ -307,8 +307,15 @@ public class BukkitQueue_All extends BukkitQueue_0<ChunkSnapshot, ChunkSnapshot,
     private ChunkSnapshot tryGetSnasphot(Chunk chunk) {
         try {
             return chunk.getChunkSnapshot(false, true, false);
-        } catch (IllegalStateException ignore) {
-            return null;
+        } catch (Throwable ignore) {
+            Throwable cause = ignore;
+            while (cause.getCause() != null) {
+                cause = cause.getCause();
+            }
+            if (cause instanceof IllegalStateException) {
+                return null;
+            }
+            throw ignore;
         }
     }