Fixed issue 253. No longer assuming that the target of a property lookup is a JSObject.

Review URL: http://codereview.chromium.org/39126

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1416 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/runtime.cc

@@ -2164,16 +2164,22 @@ static Object* Runtime_GetArgumentsProperty(Arguments args) {
 
 static Object* Runtime_ToFastProperties(Arguments args) {
   ASSERT(args.length() == 1);
-  CONVERT_ARG_CHECKED(JSObject, object, 0);
-  object->TransformToFastProperties(0);
+  Handle<Object> object = args.at<Object>(0);
+  if (object->IsJSObject()) {
+    Handle<JSObject> js_object = Handle<JSObject>::cast(object);
+    js_object->TransformToFastProperties(0);
+  }
   return *object;
 }
 
 
 static Object* Runtime_ToSlowProperties(Arguments args) {
   ASSERT(args.length() == 1);
-  CONVERT_ARG_CHECKED(JSObject, object, 0);
-  object->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES);
+  Handle<Object> object = args.at<Object>(0);
+  if (object->IsJSObject()) {
+    Handle<JSObject> js_object = Handle<JSObject>::cast(object);
+    js_object->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES);
+  }
   return *object;
 }
 

test/mjsunit/regress/regress-253.js

+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x = 0;
+x[0] = 0;
+x[0] = 1;
+x[0] = 2;