Fix with --harmony-weakmaps

[koichik]

With --harmony-weakmaps command line option, util.inherits throws TypeError.
reproduce:

$ node --harmony-weakmaps

util.js:467
  ctor.prototype = Object.create(superCtor.prototype, {
                          ^
TypeError: Invalid property.  A property cannot both have accessors and be writable or have a value: #<WeakMap>
    at Function.create (native)
    at WeakMap.inherits (util.js:467:27)
    at assert.js:52:6
    at NativeModule.compile (node.js:502:5)
    at node.js:467:18
    at buffer.js:23:14
    at NativeModule.compile (node.js:502:5)
    at Function.require (node.js:467:18)
    at Function.globalVariables (node.js:137:34)
    at startup (node.js:48:13)

[koichik]

please review.

[isaacs]

I think this is really a bug in v8 somewhere. The error message makes no sense.

Posted upstream: http://code.google.com/p/v8/issues/detail?id=1617

If we apply this patch,

1. inherits will make the constructor properties unwritable.
2. Object.create is still broken in v8.

-1.

[koichik]

Posted upstream: http://code.google.com/p/v8/issues/detail?id=1617

Thanks!