diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/evaluate-worker.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/evaluate-worker.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+// |jit-test| slow
+
+if (typeof evalInWorker == "undefined")
+    quit();
+
+gcslice(10);
+evalInWorker("print('helo world');");
+for (i = 0; i < 100000; i++) {}
+
+evalInWorker("\
+  for (var i = 0; i < 10; i++) { \
+    var o = {}; \
+    for (var j = 0; j < 100; j++) \
+      o['a' + j] = j; \
+    JSON.stringify(o); \
+    o = null; \
+    gc(); \
+}");
+for (var i = 0; i < 10; i++) {
+    gc();
+    for (var j = 0; j < 100000; j++) {}
+}