diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug634590ma.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug634590ma.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// |jit-test|
+
+this.name = "outer";
+var sb = evalcx('');
+sb.name = "inner";
+sb.parent = this;
+function f() { return this.name; }
+assertEq(evalcx('this.f = parent.f;\n' +
+                'var s = "";\n' +
+                'for (i = 0; i < 10; ++i)\n' +
+                '  s += f();\n' +
+                's',
+                sb),
+	 "outerouterouterouterouterouterouterouterouterouter");