Don't break Chrome debugger

SteveSanderson · Apr 27, 2016 · acee81f · acee81f
1 parent 75773a5
commit acee81f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/weakmap.js b/lib/weakmap.js
@@ -90,7 +90,7 @@ void function(global, undefined_, undefined){
     define(Object, namedFunction('getOwnPropertyNames', function getOwnPropertyNames(obj){
       // gh-43
       var coercedObj = Object(obj), props;
-      if (coercedObj.toString() === '[object Window]') {
+      if ('toString' in coercedObj && coercedObj.toString() === '[object Window]') {
           try {
               props = getProps(obj);
           } catch (e) {