diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug558530.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug558530.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// There's no assertEq() here;  the test is just that it doesn't crash.
+(function () {
+    new function () {}
+}());
+[function () {}]
+gc()
+for (z = 0; z < 6; ++z) {
+    x = []
+}
+for (w in [0]) {
+    x._ = w
+}
+gc()
+