fast/scrolling/mac/rubberband-overflow-in-wheel-region-root-jiggle.html is a flaky timeout on macOS Catalina and higher on wk2. HISTORY: https://results.webkit.org/?suite=layout-tests&test=fast%2Fscrolling%2Fmac%2Frubberband-overflow-in-wheel-region-root-jiggle.html This test appears to have been flaky timing out for as far back as I could scroll. Timeout DIFF: +#PID UNRESPONSIVE - WebKitTestRunner (pid 69253) +FAIL: Timed out waiting for notifyDone to be called -Test that rubberbanding inside overflow:scroll in the non-fast scrollable region does not trigger page scrolls -Waiting for rubberband... -Waiting for stabilization -PASS overflowScrollEventCount > 0 is true -PASS windowScrollEventCount == 0 is true -PASS successfullyParsed is true - -TEST COMPLETE - +#EOF +#EOF
I was able to reproduce this at Catalina Debug ToT using the following test: run-webkit-tests fast/scrolling/mac/rubberband-overflow-in-wheel-region-root-jiggle.html --iterations 100 -f This test appears to have been flaky for a while. It does look like the first timeout occurred at r271646. So there may be a regression point around there. I'm going to attempt to bisect.
Created attachment 427946 [details] WebKitTestRunner sample text Attaching WebKitTestRunner sample.txt from timeout reproduction.
I have updated the expectations to Pass Timeout here while the test is reviewed: https://trac.webkit.org/changeset/277138/webkit I haven't been able to discover a regression point. I was able to reproduce timeouts over 8000 revisions back.
<rdar://problem/77631567>