Don't call unlink on a disposed property from PaintObserver, fixes #692

phetsims · Oct 23, 2017 · 7d8c7af · 7d8c7af
1 parent 84e6066
commit 7d8c7af
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/js/display/PaintObserver.js b/js/display/PaintObserver.js
@@ -265,7 +265,9 @@ define( function( require ) {
       if ( this.secondaryListenedCounts[ index ] === 0 ) {
         this.secondaryListenedProperties.splice( index, 1 );
         this.secondaryListenedCounts.splice( index, 1 );
-        property.unlink( this.updateSecondaryListener );
+        if ( !property.isDisposed ) {
+          property.unlink( this.updateSecondaryListener );
+        }
       }
     },