diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testThinForEach.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testThinForEach.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+function testThinForEach() {
+    var a = ["red"];
+    var n = 0;
+    for (var i = 0; i < 10; i++)
+        for each (var v in a)
+            if (v)
+                n++;
+    return n;
+}
+assertEq(testThinForEach(), 10);