193091 2019-01-02 14:55:41 -0800 [ Mojave WK1 ] Four Layout Tests in fast/repaint/* are flaky 2019-01-03 08:48:42 -0800 1 1 1 Unclassified WebKit Tools / Tests WebKit Nightly Build Unspecified Unspecified NEW https://bugs.webkit.org/show_bug.cgi?id=192881 https://bugs.webkit.org/show_bug.cgi?id=193108 P2 Normal --- 1 tsavell webkit-unassigned ap jlewis3 lforschler ryanhaddad simon.fraser zalan oldest_to_newest 1491272 0 tsavell 2019-01-02 14:55:41 -0800 The following layout tests are flaky on Mojave WK1 fast/repaint/fixed.html fast/repaint/fixed-to-relative-position-with-absolute-child.html fast/repaint/fixed-scale.html fast/repaint/absolute-position-changed.html Probable cause: These four image tests fail in tandem. All three tests seem to be drawing boxes, and incorrectly zooming in on the results. Flakiness Dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Frepaint%2Ffixed.html%20fast%2Frepaint%2Ffixed-to-relative-position-with-absolute-child.html%20fast%2Frepaint%2Ffixed-scale.html%20fast%2Frepaint%2Fabsolute-position-changed.html Links to image diffs: fast/repaint/absolute-position-changed.html https://build.webkit.org/results/Apple%20Mojave%20Release%20WK1%20(Tests)/r239577%20(1897)/fast/repaint/absolute-position-changed-diffs.html fast/repaint/fixed-scale.html https://build.webkit.org/results/Apple%20Mojave%20Release%20WK1%20(Tests)/r239577%20(1897)/fast/repaint/fixed-scale-diffs.html fast/repaint/fixed-to-relative-position-with-absolute-child.html https://build.webkit.org/results/Apple%20Mojave%20Release%20WK1%20(Tests)/r239577%20(1897)/fast/repaint/fixed-to-relative-position-with-absolute-child-diffs.html fast/repaint/fixed.html https://build.webkit.org/results/Apple%20Mojave%20Release%20WK1%20(Tests)/r239577%20(1897)/fast/repaint/fixed-diffs.html 1491275 1 ryanhaddad 2019-01-02 15:01:37 -0800 The symptoms here look very similar to https://bugs.webkit.org/show_bug.cgi?id=192881, where the "actual" image is blank white. 1491315 2 tsavell 2019-01-02 16:39:37 -0800 I have been unable to reproduce the failures with either running the four tests continuously, running the whole directory repeatedly on one process, or by running the single test runner they all fail on in one process.