diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/strict/regress-532041.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/strict/regress-532041.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+
+/*
+ * JSFunction::findDuplicateFormal (nee js_FindDuplicateFormal), used
+ * by strict checks, sometimes failed to choose the correct branch of
+ * the fun->u.i.names union: it used the argument count, not the
+ * overall name count.
+ */
+function f(a1,a2,a3,a4,a5) { "use strict"; var v1, v2, v3, v4, v5, v6, v7; }
+
+reportCompare(true, true);