91148 2012-07-12 14:16:59 -0700 [V8] Replaceable WebIDL attributes are broken 2012-07-19 11:56:59 -0700 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Unspecified Unspecified RESOLVED DUPLICATE 91668 http://www.w3.org/TR/WebIDL/#Replaceable P2 Normal --- 49739 1 arv webkit-unassigned abarth antonm atwilson haraken japhet oldest_to_newest 668201 0 arv 2012-07-12 14:16:59 -0700 DOMWindow.idl has a bunch of [Replaceable] attributes. This means that the js property should be writable and setting the property should just replace the property. The following shouldBe* both fails. window.innerHeight = 42; shouldBe('window.innerHeight', '42'); shouldBeTrue('Object.getOwnPropertyDescriptor(window, "innerHeight").writable)'); Once we implement bug 49739 the setter needs to defineProperty on the this object. Something like { get: function() { return impl->innerHeight() }, set: function(v) { Object.defineProperty({ value: v, writable: true ... } ... } Right now we only have a get interceptor. I think we can get by using a set interceptor that calls ForceSet but it is possible that we also have to Delete the old property. 668206 1 arv 2012-07-12 14:20:08 -0700 Sorry, this is only a problem with es5_readonly which we are trying to turn on. 673752 2 arv 2012-07-19 11:56:59 -0700 *** This bug has been marked as a duplicate of bug 91668 ***