[Webkit-unassigned] [Bug 217051] A question about defineProperty of Proxy object

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217051

Alexey Shvayka <shvaikalesh at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #1 from Alexey Shvayka <shvaikalesh at gmail.com> ---
(In reply to NWU_NISL from comment #0)
> But jsc didn't throw any error as my expection, Is there any information I
> have missed?

Thank you for detailed bug report.
You are absolutely right, a TypeError should be thrown because the trap didn't return a truthy value.
r259822 fixed ProxyObject::performDefineOwnProperty() to do that, aligning JSC with other engines.

> #### version
> dbae081

This appears to be referring to https://github.com/WebKit/webkit/commit/dbae081ad7e22d9ab61edf2f337f6c2bb593c7f8,
which was 6 weeks after the fix. Are we sure it's correct?

I can confirm the bug reproducing in Safari 13.1.2, yet fixed in TP 113.

*** This bug has been marked as a duplicate of bug 210267 ***

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