diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug539379.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug539379.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+try {
+    // On X64 this was crashing rather than causing a "too much recursion" exception.
+    x = /x/;
+    (function f() {
+        x.r = x;
+        return f()
+    })();
+} catch (e) {}
+