Fix issue with prototype of WeakMap constructor.

test/mjsunit/harmony/weakmaps.js

 // Copyright 2011 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
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 //
 //     * Redistributions of source code must retain the above copyright
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@@ skipping 121 matching lines @@
 
 // Test some common JavaScript idioms
 var m = new WeakMap;
 assertTrue(m instanceof WeakMap);
 assertTrue(WeakMap.prototype.set instanceof Function)
 assertTrue(WeakMap.prototype.get instanceof Function)
 assertTrue(WeakMap.prototype.has instanceof Function)
 assertTrue(WeakMap.prototype.delete instanceof Function)
 
 
+// Regression test for issue 1617: The prototype of the WeakMap constructor
+// needs to be unique (i.e. different from the one of the Object constructor).
+assertFalse(WeakMap.prototype === Object.prototype);

[rossberg, 2011/08/16 11:14:19]

Could you also add a couple of tests checking that the usual object stuff works
properly on weak map objects? I.e., setting and getting some properties, through
syntax and through the reflective interface.

[Michael Starzinger, 2011/08/16 11:53:19]

Done.

+
+
 // Stress Test
 // There is a proposed stress-test available at the es-discuss mailing list
 // which cannot be reasonably automated.  Check it out by hand if you like:
 // https://mail.mozilla.org/pipermail/es-discuss/2011-May/014096.html