diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug928423.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug928423.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+function f(o, p) {
+    try {} catch(e) {};
+    return o[p];
+}
+function test() {
+    var o = {foo: 1, bar: 2, foobar: 3};
+
+    for (var i = 0; i < 30; i++) {
+	assertEq(f(o, "foo1".substr(0, 3)), 1);
+	assertEq(f(o, "bar1".substr(0, 3)), 2);
+	assertEq(f(o, "foobar1".substr(0, 6)), 3);
+    }
+}
+test();