[Webkit-unassigned] [Bug 159678] REGRESSION(r203110): LayoutTest http/tests/preload/single_download_preload_runner.html timing out

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=159678

--- Comment #12 from Yoav Weiss <yoav at yoav.ws> ---
(In reply to comment #11)
> (In reply to comment #10)
> > (In reply to comment #9)
> > > (In reply to comment #8)
> > > > Comment on attachment 287613 [details]
> > > > Patch
> > > > 
> > > > View in context:
> > > > https://bugs.webkit.org/attachment.cgi?id=287613&action=review
> > > > 
> > > > This new test fails for me on Sierra.
> > > 
> > > What's the failure output? I don't have Sierra to test on...
> > ---
> > /Users/alexchristensen/code/OpenSource/WebKitBuild/Debug/layout-test-results/
> > http/tests/preload/single_download_preload-expected.txt
> > +++
> > /Users/alexchristensen/code/OpenSource/WebKitBuild/Debug/layout-test-results/
> > http/tests/preload/single_download_preload-actual.txt
> > @@ -1,5 +1,9 @@
> >  CONSOLE MESSAGE: line 21: <link rel=preload> must have a valid `as` value
> >   
> >  
> > -PASS Makes sure that preloaded resources are not downloaded again when used 
> > +FAIL Makes sure that preloaded resources are not downloaded again when used
> > assert_equals: The number of resource downloads expected 12 but got
> > 14(stack: assert at http://127.0.0.1:8000/w3c/resources/testharness.js:2060:37
> > +assert_equals at http://127.0.0.1:8000/w3c/resources/testharness.js:699:15
> > +http://127.0.0.1:8000/preload/single_download_preload.html:52:22
> > +step at http://127.0.0.1:8000/w3c/resources/testharness.js:1160:30
> > +http://127.0.0.1:8000/w3c/resources/testharness.js:1189:33)
> 
> Hmm, that seems like a real issue, but I can't reproduce locally :/ Any
> ideas on what can be different in Sierra? (I'm on El-Capitan)

I was able to reproduce locally. Seems like image resources are (sometimes) double downloading, which is what this test is supposed to protect against. I'll investigate and fix.

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