From 5bdc2d65192a130e4418413b79a793def9c25bef Mon Sep 17 00:00:00 2001
From: Jesse Boyd <jessepaleg@gmail.com>
Date: Sat, 14 Apr 2018 02:23:31 +1000
Subject: [PATCH] Fixes #970

---
 core/src/main/java/com/sk89q/worldedit/LocalSession.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/core/src/main/java/com/sk89q/worldedit/LocalSession.java b/core/src/main/java/com/sk89q/worldedit/LocalSession.java
index b7938f9a..0fa32e6a 100644
--- a/core/src/main/java/com/sk89q/worldedit/LocalSession.java
+++ b/core/src/main/java/com/sk89q/worldedit/LocalSession.java
@@ -721,13 +721,15 @@ public class LocalSession {
         return selector.getRegion();
     }
 
-    public synchronized @Nullable VirtualWorld getVirtualWorld() {
-        return virtual;
+    public @Nullable VirtualWorld getVirtualWorld() {
+        synchronized (dirty) {
+            return virtual;
+        }
     }
 
     public void setVirtualWorld(@Nullable VirtualWorld world) {
         VirtualWorld tmp;
-        synchronized (this) {
+        synchronized (dirty) {
             tmp = this.virtual;
             this.virtual = world;
         }