Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: e4e335cf8df2ef656d057d54f2b317dcce2fd09d
https://github.com/WebKit/WebKit/commit/e4e335cf8df2ef656d057d54f2b317dcce2fd09d
Author: Sergey Rubanov <[email protected]>
Date: 2026-09-30 (Wed, 30 Sep 2026)
Changed paths:
A JSTests/stress/array-constructor-length-after-prototype.js
M Source/JavaScriptCore/runtime/ArrayConstructor.cpp
Log Message:
-----------
[JSC] Read Array newTarget.prototype before an invalid-length RangeError
https://bugs.webkit.org/show_bug.cgi?id=325494
Reviewed by Yusuke Suzuki.
A single numeric argument is checked with ToUint32 before
GetPrototypeFromConstructor. When that length is not a safe integer
index, the RangeError is thrown without reading newTarget.prototype,
so a throwing getter never runs.
The length is already a number here, so the conversion itself has no
side effect. Read prototype, and GetFunctionRealm when the result is
not an object, before throwing.
* JSTests/stress/array-constructor-length-after-prototype.js: Added.
* Source/JavaScriptCore/runtime/ArrayConstructor.cpp:
(JSC::constructArrayWithSizeQuirk):
Canonical link: https://commits.webkit.org/322282@main
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