145738 2015-06-07 12:55:17 -0700 Deleteting static function twice revives property with undefined 2015-06-07 13:44:52 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED DUPLICATE 145705 P2 Normal --- 1 ysuzuki webkit-unassigned fpizlo ggaren oldest_to_newest 1100208 0 ysuzuki 2015-06-07 12:55:17 -0700 RegExp.prototype.hasOwnProperty('exec'); // true delete RegExp.prototype.exec; // true RegExp.prototype.hasOwnProperty('exec'); // false delete RegExp.prototype.exec; // true RegExp.prototype.hasOwnProperty('exec'); // true ??? This is because JSObject::deleteProperty set undefine by `putEntry` if `isValidOffset(...)` is false (deleted). 1100209 1 ysuzuki 2015-06-07 13:44:52 -0700 We'll fix this with issue 145705. *** This bug has been marked as a duplicate of bug 145705 ***