diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug877378.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug877378.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+evalcx("\
+    let z = 'x';\
+    for (var v of z) {\
+        y = evaluate(\"Object.defineProperty(this,\\\"y\\\",\
+                         {get:  function() {}}\
+                    );\",\
+               {catchTermination: true, saveFrameChain: true}\
+        );\
+    }",
+    newGlobal('')
+)
+
+evalcx("\
+    for (x = 0; x < 1; ++x) { \
+        v = evaluate(\"gc\",{ \
+            saveFrameChain: true \
+        })\
+    }\
+", newGlobal(''));