diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/generators-5.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/generators-5.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Breaking out of a for-of loop over a generator-iterator does not close the iterator.
+
+load(libdir + "iteration.js");
+
+function range(n) {
+    for (var i = 0; i < n; i++)
+        yield i;
+}
+
+var r = range(10);
+var s = '';
+for (var x of r) {
+    s += x;
+    if (x == 4)
+        break;
+}
+s += '/';
+for (var y of r)
+    s += y;
+assertEq(s, '01234/56789');