220842 2021-01-21 23:20:45 -0800 A question about global variables 2021-02-02 10:45:22 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Local Build PC Linux RESOLVED DUPLICATE 203456 InRadar P2 Normal --- 1 nisl_grammarly1 ashvayka ashvayka fpizlo keith_miller mark.lam nwu_ty smoley webkit-bug-importer ysuzuki oldest_to_newest 1721495 0 nisl_grammarly1 2021-01-21 23:20:45 -0800 #version: dbae081(https://github.com/WebKit/WebKit-http/commit/dbae081ad7e22d9ab61edf2f337f6c2bb593c7f8) #Testcase: var x = 4; Object.defineProperty(this, 'x', { writable: false }); x = 3; print(x); print(this.x); #Command: ./webkit/WebKitBuild/Release/bin/jsc testcase.js #Output: 3 4 #Expected output: 4 4 #Description: When executing this test case, since x is not writable (in line 3), other engines (such as v8, SpiderMonkey, chakra, etc.) did not change the value of x, but JavascriptCore successfully changed the value of x to 3. Maybe this is a bug of JavascriptCore. 1723214 1 webkit-bug-importer 2021-01-27 16:54:51 -0800 <rdar://problem/73686367> 1724168 2 ysuzuki 2021-02-01 02:42:51 -0800 @Alexey maybe this is the same to https://bugs.webkit.org/show_bug.cgi?id=203456 ? 1724661 3 ashvayka 2021-02-02 07:39:27 -0800 (In reply to Yusuke Suzuki from comment #2) > @Alexey maybe this is the same to > https://bugs.webkit.org/show_bug.cgi?id=203456 ? Yeah, that's right, thanks. I wish we could remove JSGlobalObject::defineOwnProperty() though... *** This bug has been marked as a duplicate of bug 203456 *** 1724760 4 ysuzuki 2021-02-02 10:45:22 -0800 (In reply to Alexey Shvayka from comment #3) > (In reply to Yusuke Suzuki from comment #2) > > @Alexey maybe this is the same to > > https://bugs.webkit.org/show_bug.cgi?id=203456 ? > > Yeah, that's right, thanks. > I wish we could remove JSGlobalObject::defineOwnProperty() though... Yeah :) > > *** This bug has been marked as a duplicate of bug 203456 ***