diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug798678.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug798678.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+var w = new WeakMap();
+var g = newGlobal();
+var k = g.eval('for (var i=0; i<100; i++) new Object(); var q = new Object(); q');
+w.set(k, {});
+k = null;
+
+gc();
+g.eval('q = null');
+gc(g);
+gc();