diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/Map-constructor-generator-exception.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/Map-constructor-generator-exception.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+// Iterating over the argument to Map can throw. The exception is propagated.
+
+load(libdir + "asserts.js");
+
+function data2() {
+    yield [{}, "XR22/Z"];
+    yield [{}, "23D-BN"];
+    throw "oops";
+}
+
+var it = data2();
+assertThrowsValue(function () { Map(it); }, "oops");