159664 2016-07-11 21:46:16 -0700 for-in over object with a Symbol key breaks upon JITing 2021-05-14 13:26:31 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 160211 P2 Normal --- 1 chrisjshull webkit-unassigned ashvayka oldest_to_newest 1209938 0 chrisjshull 2016-07-11 21:46:16 -0700 See http://jsbin.com/pelokucuwe/1/edit?js,console Console shows that iterating over an object with a Symbol key breaks over time (theory is due to JITing). Observed: ["bar", function bar() {}] ["bar", 1] Expected: ["bar", function bar() {}] ["bar", function bar() {}] From https://github.com/emberjs/ember.js/issues/13796 1760180 1 ashvayka 2021-05-14 13:26:31 -0700 (In reply to Chris J. Shull from comment #0) > See http://jsbin.com/pelokucuwe/1/edit?js,console Thank you for extracting the test case, Chris! JIT crash was fixed in r203793. *** This bug has been marked as a duplicate of bug 160211 ***