154768 2016-02-26 18:13:49 -0800 ProxyObject.[[GetOwnProperty]] is partially broken because it doesn't propagate information back to the slot 2016-02-28 10:40:53 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 saam saam commit-queue keith_miller mark.lam msaboff oldest_to_newest 1168777 0 saam 2016-02-26 18:13:49 -0800 ... 1168798 1 272397 saam 2016-02-26 20:34:46 -0800 Created attachment 272397 patch 1168822 2 272397 rniwa 2016-02-26 21:53:11 -0800 Comment on attachment 272397 patch View in context: https://bugs.webkit.org/attachment.cgi?id=272397&action=review > Source/JavaScriptCore/ChangeLog:10 > + This fixes a big bug with ProxyObject.[[GetOwnProperty]]. We weren't > + correctly propagating the result of this operation to the out PropertySlot& > + parameter. This patch fixes that and adds tests. Can we refer to http://www.ecma-international.org/ecma-262/6.0/#sec-proxy-object-internal-methods-and-internal-slots-getownproperty-p either in the change log or in the code? > Source/JavaScriptCore/runtime/ObjectConstructor.cpp:236 > JSObject* description = constructEmptyObject(exec); > + if (exec->hadException()) > + return jsUndefined(); Please mention this change in the change log. > Source/JavaScriptCore/runtime/ProxyObject.cpp:216 > + GetterSetter* getterSetter = trapResultAsDescriptor.slowGetterSetter(exec); > + if (exec->hadException()) > + return false; I guess the only way we can fail here would be memory exhaustion? Otherwise, we should be careful about the order in which these conditions are checked as they're observable. 1169006 3 saam 2016-02-28 10:40:53 -0800 landed in: http://trac.webkit.org/changeset/197295 272397 2016-02-26 20:34:46 -0800 2016-02-26 21:53:11 -0800 patch a-backup.diff text/plain 12522 saam SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMTk3MjI4KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDQxIEBA CisyMDE2LTAyLTI2ICBTYWFtIGJhcmF0aSAgPHNiYXJhdGlAYXBwbGUuY29tPgorCisgICAgICAg IFByb3h5T2JqZWN0LltbR2V0T3duUHJvcGVydHldXSBpcyBwYXJ0aWFsbHkgYnJva2VuIGJlY2F1 c2UgaXQgZG9lc24ndCBwcm9wYWdhdGUgaW5mb3JtYXRpb24gYmFjayB0byB0aGUgc2xvdAorICAg ICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MTU0NzY4CisKKyAg ICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAgICAgICAgVGhpcyBmaXhlcyBh 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