Bug 507295: store unboxed value instead of boxed on the stack for traced JSOP_SETNAME with closures, r=gal

js/src/jstracer.cpp

@@ -9770,10 +9770,11 @@ TraceRecorder::setProp(jsval &l, JSPropCacheEntry* entry, JSScopeProperty* sprop
         else
             ABORT_TRACE("can't trace special CallClass setter");
 
-        LIns* v_ins = get(&v);
-        box_jsval(v, v_ins);
+        v_ins = get(&v);
+        LIns* v_boxed_ins = v_ins;
+        box_jsval(v, v_boxed_ins);
         LIns* args[] = {
-            v_ins,
+            v_boxed_ins,
             INS_CONST(SPROP_USERID(sprop)),
             obj_ins,
             cx_ins

js/tests/js1_8_1/regress/regress-507295.js

@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2008
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Dave Mandelin
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+var gTestfile = 'regress-507295.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 507295;
+var summary = 'TM: assert with using result of assignment to closure var'
+var actual = '';
+var expect = 'do not crash';
+
+
+//-----------------------------------------------------------------------------
+start_test();
+jit(true);
+
+(function () {
+    var y;
+    (eval("(function () {\
+               for (var x = 0; x < 3; ++x) {\
+               ''.replace(/a/, (y = 3))\
+               }\
+           });\
+     "))()
+})()
+
+jit(false);
+actual = 'do not crash'
+finish_test();
+//-----------------------------------------------------------------------------
+
+function start_test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+}
+
+function finish_test()
+{
+  reportCompare(expect, actual, summary);
+  exitFunc ('test');
+}