157863 2016-05-18 14:53:35 -0700 [ES6] Built-in functions, strict functions created using the Function constructor, and function create by bind method must not be created with 'caller' and 'arguments' own properties. 2021-05-14 06:42:38 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://tc39.github.io/ecma262/#sec-forbidden-extensions P2 Normal --- 152985 1 gskachkov webkit-unassigned ashvayka oldest_to_newest 1194429 0 gskachkov 2016-05-18 14:53:35 -0700 According to ES6 spec: Built-in functions, strict functions created using the Function constructor, generator functions created using the Generator constructor, and functions created using the bind method also must not be created with such own properties(caller & arguments). 1760056 1 ashvayka 2021-05-14 06:42:38 -0700 JSC doesn't create "caller" / "arguments" on all above-mentioned functions for a few years now (tested on r277026). I am adding these test cases as part of https://bugs.webkit.org/show_bug.cgi?id=225277.