[Webkit-unassigned] [Bug 163412] REGRESSION: MessageEvent.source for bound postMessage() is wrong for same-origin iframe

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163412

--- Comment #4 from Daniel Bates <dbates at webkit.org> ---
Created attachment 297469
  --> https://bugs.webkit.org/attachment.cgi?id=297469&action=review
Example

Attached page that demonstrates this issue. Running the example in Safari version Version 10.0 (12602.1.50.0.10) I see "Got message from A: hello". In Chrome for Mac version 56.0.2924.28 beta (64-bit) and Firefox for Mac version 49.0.1 I see "Got message from B: hello". The expected result should be the latter, "Got message from B: hello".

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