1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/js1_5/extensions/regress-420612.js b/js/src/tests/js1_5/extensions/regress-420612.js
new file mode 100644
index 000000000..a4491095e
--- /dev/null
+++ b/js/src/tests/js1_5/extensions/regress-420612.js
@@ -0,0 +1,21 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 420612;
+var summary = 'Do not assert: obj == pobj';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+var obj = Object.create([]);
+obj.unwatch("x");
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");