The following layout test is flaky on Mojave WK2 Debug and Release
Test is more flaky on Debug runs. Test was added in r244630 and appears to have been flaky its entire available history on the dashboard.
The ImageOnlyFailure's appear to only happen on Debug runs. Cannot reproduce them on Release builds, but the Release timeout is reproducible just as easily on Release builds.
run-webkit-tests scrollingcoordinator/mac/nested-sticky.html --iter 100 -f --debug
Will average aboutt 3 reference mismatches and 4 timeouts be 100 iteration run.
Marked flaky in https://trac.webkit.org/changeset/246202/webkit