1 files changed, 15 insertions, 0 deletions
diff --git a/js/src/tests/js1_8_5/extensions/regress-627984-6.js b/js/src/tests/js1_8_5/extensions/regress-627984-6.js
new file mode 100644
index 000000000..cb1a0fca9
--- /dev/null
+++ b/js/src/tests/js1_8_5/extensions/regress-627984-6.js
@@ -0,0 +1,15 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+// Bug 627984 description.
+var o = Array;
+o.p = function() {};
+o.watch('p', function() { }); 
+for(var x in o) { 
+    o[x]; 
+}
+delete o.p;
+o.p = function() {};
+assertEq(o.p, void 0);
+
+reportCompare(0, 0, 'ok');