diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug773587.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug773587.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+StrictEquality(true, new Boolean(true), false, 0);
+function StrictEquality(x, y, expect, i) {
+    result = ( x === y );
+    if (i < 100)
+        StrictEquality(y.environment !== Set.environment, true, false, i + 1);
+}