diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug767234.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug767234.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+function gen()
+{
+    var local = new Date();
+    yield 1;
+    local = null;
+    gc();
+    gcslice(0);
+    yield 2;
+}
+
+var g = gen();
+g.next();
+g.next();
+gcslice();