diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug465272.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug465272.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+function testBug465272() {
+    var a = new Array(5);
+    for (j=0;j<5;++j) a[j] = "" + ((5) - 2);
+    return a.join(",");
+}
+assertEq(testBug465272(), "3,3,3,3,3");