[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 #15 from Michael Catanzaro <mcatanzaro at igalia.com> ---
(In reply to comment #14)
> Finally found the issue. The problem is the viewport controller, that is
> changed by the fixed layout tests, but never reset. There's also a problem
> with the fixed layout tests that could leave the view in an inconsistent
> state as I explained in bug #160117. I'm already working on a proper fix,
> but in the meantime I've skipped fixed layout tests (they are only two) to
> make sure we don't see all those flaky tests in the bots anymore. To easily
> reproduce it, launch run-webkit-tests with a single worker job and run fixed
> layout test first and then other ref tests, for example:
> 
> $ run-webkit-tests --gtk --release --child-processes=1
> fast/fixed-layout/fixed-layout.html fast/regions

It's clearly a big improvement, good job.

But it's still not completely fixed. We have 50 unexpected passes in build #18009, for example. These are tests that normally always fail, but occasionally pass now that we've enabled threaded compositor.

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