diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug840012.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug840012.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+// |jit-test| error:out of memory
+
+gcPreserveCode();
+evaluate("gcparam(\"maxBytes\", gcparam(\"gcBytes\") + 4*1024);");
+evaluate("\
+function testDontEnum(F) { \
+  function test() {\
+    var upvar = \"\";\
+    function f() { upvar += \"\"; }\
+    typeof (new test(\"1\")) != 'function'\
+  }\
+  test();\
+} \
+var list = [];\
+for (i in list)\
+  var F = this[list[i]];\
+actual = testDontEnum(F);\
+");