Pre-create properties on JSRegExp objects

test/mjsunit/mirror-regexp.js

 // Copyright 2008 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
@@ skipping 52 matching lines @@
   assertTrue(mirror instanceof debug.Mirror);
   assertTrue(mirror instanceof debug.ValueMirror);
   assertTrue(mirror instanceof debug.ObjectMirror);
   assertTrue(mirror instanceof debug.RegExpMirror);
 
   // Check the mirror properties.
   assertTrue(mirror.isRegExp());
   assertEquals('regexp', mirror.type());
   assertFalse(mirror.isPrimitive());
   for (var p in expected_attributes) {
-    assertEquals(mirror.property(p).attributes(),
-                 expected_attributes[p],
+    assertEquals(expected_attributes[p],
+                 mirror.property(p).attributes(),
                  p + ' attributes');
   }
 
   // Test text representation
   assertEquals('/' + r.source + '/', mirror.toText());
 
   // Parse JSON representation and check.
   var fromJSON = eval('(' + json + ')');
   assertEquals('regexp', fromJSON.type);
   assertEquals('RegExp', fromJSON.className);
@@ skipping 16 matching lines @@
     }
   }
 }
 
 
 // Test Date values.
 testRegExpMirror(/x/);
 testRegExpMirror(/[abc]/);
 testRegExpMirror(/[\r\n]/g);
 testRegExpMirror(/a*b/gmi);