diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testSuppressDeletedProperty.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testSuppressDeletedProperty.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+var obj = { a:1, b:1, c:1, d:1, e:1, f:1, g:1 };
+var sum = 0;
+for each (var i in obj) {
+    sum += i;
+    delete obj.f;
+}
+
+// this isn't even implemented to work yet; just don't crash or iloop