LayoutTest fast/html/marquee-scroll.html is a flaky image failure after https://trac.webkit.org/changeset/223313/webkit
The image diff link shows "(null%)" and leads to a 404 page.
I'm not sure why, but the image failures seem to have stopped.
Now the test is a flaky crash, hitting an assertion failure on macOS debug bots.
(In reply to Ryan Haddad from comment #2)
> I'm not sure why, but the image failures seem to have stopped.
> Now the test is a flaky crash, hitting an assertion failure on macOS debug
Filed https://bugs.webkit.org/show_bug.cgi?id=178465 to track.