Handle accessors when generating Error.stack...

src/messages.js

Index: src/messages.js
===================================================================
--- src/messages.js	(revision 5238)
+++ src/messages.js	(working copy)
@@ -707,14 +707,20 @@
   // See if we can find a unique property on the receiver that holds
   // this function.
   var ownName = this.fun.name;
-  if (ownName && this.receiver && this.receiver[ownName] === this.fun)
+  if (ownName && this.receiver &&
+      (ObjectLookupGetter.call(this.receiver, ownName) === this.fun ||
+       ObjectLookupSetter.call(this.receiver, ownName) === this.fun ||
+       this.receiver[ownName] === this.fun)) {
     // To handle DontEnum properties we guess that the method has
     // the same name as the function.
     return ownName;
+  }
   var name = null;
   for (var prop in this.receiver) {
-    if (this.receiver[prop] === this.fun) {
-      // If we find more than one match bail out to avoid confusion
+    if (this.receiver.__lookupGetter__(prop) === this.fun ||
+        this.receiver.__lookupSetter__(prop) === this.fun ||
+        (!this.receiver.__lookupGetter__(prop) && this.receiver[prop] === this.fun)) {
+      // If we find more than one match bail out to avoid confusion.
       if (name)
         return null;
       name = prop;