[Webkit-unassigned] [Bug 232723] New: Array.prototype.toLocaleString does not respect deletion of Object.prototype.toLocaleString
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Nov 4 13:24:46 PDT 2021
https://bugs.webkit.org/show_bug.cgi?id=232723
Bug ID: 232723
Summary: Array.prototype.toLocaleString does not respect
deletion of Object.prototype.toLocaleString
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: richard.gibson at gmail.com
The algorithm at https://tc39.es/ecma402/#sup-array.prototype.tolocalestring requires looking up a "toLocaleString" property on each non-undefined non-null element of the receiver array, invoking it as a method, and (absent an exception) passing the result through ToString. However, JSC appears to have a hidden but always-present default method.
The following statement list should throw an exception, but does not:
delete Object.prototype.toLocaleString;
[{}].toLocaleString();
Also reported to test262 for coverage: https://github.com/tc39/test262/issues/3298
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