[Webkit-unassigned] [Bug 209006] REGRESSION: [ Mac iOS wk2 ] imported/w3c/web-platform-tests/html/semantics/scripting-1/the-script-element/execution-timing/085.html is failing

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Apr 22 13:26:02 PDT 2020


https://bugs.webkit.org/show_bug.cgi?id=209006

Chris Dumez <cdumez at apple.com> changed:

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

--- Comment #9 from Chris Dumez <cdumez at apple.com> ---
(In reply to Chris Dumez from comment #8)
> (In reply to Chris Dumez from comment #7)
> > (In reply to Alexey Proskuryakov from comment #6)
> > > This quite certainly is a regression from r258268.
> > 
> > Flakiness is likely triggered by when the first paint actually happens since
> > the script is delayed until first paint.
> 
> I think the test is inherently flaky. It has a slow loading defer script (1
> second to load) and an async script. It expects the async script to always
> run first.

To be clear, there is no expectation that async scripts run before defer scripts. async script run whenever they are done loading, which may happen before or after DOMContentLoaded. defer scripts run after DOMContentLoaded always. This test is using a 1 second delay to try and make sure that the async script finishes loading before DOMContentLoaded but this is bound to be flaky. This is definitely flakier too now that we defer async scripts further in some cases.

I think marking this test as flaky is the right thing to do given that this is an upstream test.

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