[Webkit-unassigned] [Bug 161242] [GTK][Threaded Compositor] Several flaky tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161242

--- Comment #19 from Carlos Alberto Lopez Perez <clopez at igalia.com> ---
(In reply to comment #18)
> (In reply to comment #17)
> > (In reply to comment #16)
> > > You are assuming again that there's a single issue.
> > 
> > No, clearly there were many different issues, as you've fixed three
> > different issues so far....
> > 
> > > I think the situation now
> > > is mostly the same to what we had before switching to the threaded
> > > compositor.
> > 
> > Yes, except for the fact that sometimes a bunch of tests pass when they
> > usually fail. In build #18023 we have 84 unexpected passes; that never
> > happened before. What's interesting is these tests either always pass or
> > always fail in a particular run of run-webkit-tests; they are clearly flaky,
> > but they don't contribute to the flakiness count.
> 
> We should probably mark them as pass, to see what's wrong when they fail

That don't makes much sense to me.

You can see the failure diff even if they are expected failures. You just have to navigate under https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/ to find them.

For example: 

1) Check the unexpected passes at end of build #18023 https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/18023/steps/layout-test/logs/stdio and pick 1

2) I pick: imported/mozilla/svg/blend-difference-stacking.html

3) Check that on the next build that test failed. Log of the next build: https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/18024/steps/layout-test/logs/stdio <--- yes it failed

4) Go to https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/ and find the results for build #18204 -> https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r205335%20%2818024%29/

5) Now under that folder navigate to imported/mozilla/svg/ and look for the blend-difference-stacking diff

6) Here you have it: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r205335%20%2818024%29/imported/mozilla/svg/blend-difference-stacking-diffs.html

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