diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug657986.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug657986.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+// Binary: cache/js-dbg-32-5d1cbc94bc42-linux
+// Flags: -m -n -a
+//
+function f(x) {
+    this.i = x;
+}
+for each(let e in [0, 0, []]) {
+    try {
+        f(e)
+    } catch (e) {}
+}
+print(uneval(this))