160211 2016-07-26 14:12:28 -0700 We don't optimize for-in properly in baseline JIT (maybe other JITs too) with an object with symbols 2021-05-14 13:26:31 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Local Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 saam saam benjamin chrisjshull commit-queue fpizlo ggaren gskachkov keith_miller mark.lam msaboff oliver sukolsak ticaiolima webkit-bug-importer ysuzuki oldest_to_newest 1214659 0 saam 2016-07-26 14:12:28 -0700 ``` var one = Symbol(); var args = {}; args[one] = 1; args.two = 2; function kv(obj) { var arr = []; for (var key in obj) { arr.push(key); arr.push(obj[key]); } return arr; } log(kv(args)); var c = 30; while (c--) { kv({c: c}); } log(kv(args)); function log(m) { var div = document.createElement('div'); document.body.appendChild(div); div.textContent = JSON.stringify(m); } ``` The result should not change. But we currently get: ["two",2] ["two",1] expected: ["two",2] ["two",2] 1214979 1 webkit-bug-importer 2016-07-27 11:41:10 -0700 <rdar://problem/27572612> 1214985 2 284714 saam 2016-07-27 12:27:21 -0700 Created attachment 284714 patch 1214986 3 284714 ggaren 2016-07-27 12:29:26 -0700 Comment on attachment 284714 patch r=me 1214996 4 284719 saam 2016-07-27 12:46:12 -0700 Created attachment 284719 patch for landing 1215018 5 284727 saam 2016-07-27 13:59:10 -0700 Created attachment 284727 patch for landing added more to the test 1215028 6 284727 commit-queue 2016-07-27 14:12:23 -0700 Comment on attachment 284727 patch for landing Clearing flags on attachment: 284727 Committed r203793: <http://trac.webkit.org/changeset/203793> 1215029 7 commit-queue 2016-07-27 14:12:27 -0700 All reviewed patches have been landed. Closing bug. 1760181 8 ashvayka 2021-05-14 13:26:31 -0700 *** Bug 159664 has been marked as a duplicate of this bug. *** 284714 2016-07-27 12:27:21 -0700 2016-07-27 12:46:12 -0700 patch c-backup.diff text/plain 2282 saam SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMjAzNzg1KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDIxIEBA CisyMDE2LTA3LTI3ICBTYWFtIEJhcmF0aSAgPHNiYXJhdGlAYXBwbGUuY29tPgorCisgICAgICAg IFdlIGRvbid0IG9wdGltaXplIGZvci1pbiBwcm9wZXJseSBpbiBiYXNlbGluZSBKSVQgKG1heWJl IG90aGVyIEpJVHMgdG9vKSB3aXRoIGFuIG9iamVjdCB3aXRoIHN5bWJvbHMKKyAgICAgICAgaHR0 cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE2MDIxMQorICAgICAgICA8cmRh cjovL3Byb2JsZW0vMjc1NzI2MTI+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BT ISkuCisKKyAgICAgICAgVGhlIGZhc3QgZm9yLWluIGl0ZXJhdGlvbiBtb2RlIGFzc3VtZXMgYWxs 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