diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/throw.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/throw.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Control can exit a for-of loop via throw.
+
+function f() {
+    for (var a of [1, 2, 3]) {
+        for (var b of [1, 2, 3]) {
+            for (var c of [1, 2, 3]) {
+                if (a !== b && b !== c && c !== a)
+                    throw [a, b, c];
+            }
+        }
+    }
+}
+
+var x = null;
+try {
+    f();
+} catch (exc) {
+    x = exc.join("");
+}
+assertEq(x, "123");