[Webkit-unassigned] [Bug 222228] postMessage changes prototype of basic types

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=222228

--- Comment #5 from Chris Dumez <cdumez at apple.com> ---
Indeed, I see this in STP 120:
[Log] is Object before postMessage?:  – true (iframeConsoleRunner-7f4d47902dc785f30dedcac9c996b9f31d4dfcc33567cc48f0431bc918c2bf05.js, line 1)
[Log] is Array before postMessage?:  – true (iframeConsoleRunner-7f4d47902dc785f30dedcac9c996b9f31d4dfcc33567cc48f0431bc918c2bf05.js, line 1)
[Log] is Object after postMessage?:  – false (iframeConsoleRunner-7f4d47902dc785f30dedcac9c996b9f31d4dfcc33567cc48f0431bc918c2bf05.js, line 1)
[Log] is Array after postMessage?:  – false (iframeConsoleRunner-7f4d47902dc785f30dedcac9c996b9f31d4dfcc33567cc48f0431bc918c2bf05.js, line 1)

and this in my System Safari:
[Log] is Object before postMessage?:  – true (xxRLPKp, line 52)
[Log] is Array before postMessage?:  – true (xxRLPKp, line 53)
[Log] is Object after postMessage?:  – true (xxRLPKp, line 45)
[Log] is Array after postMessage?:  – true (xxRLPKp, line 46)

I will bisect.

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