[ MacOS Debug ] REGRESSION (r242687) Layout Tests fast/events/wheel* are flaky timeouts

• Component: Tools / Tests
• Status: RESOLVED CONFIGURATION CHANGED

[Shawn Roberts]

The following layout tests are flaky on MacOS Debug

fast/events/wheel-event-destroys-overflow.html 
fast/events/wheelevent-mousewheel-interaction.html 
fast/events/wheel-event-destroys-frame.html 
fast/events/wheelevent-basic.html 
fast/events/wheelevent-in-text-node.html

Probable cause:

Started testing around ~242694 as this was the first time it showed up on the flakiness dashboard. 

Through testing found it was failing locally on debug builds with r242688 (which includes r242687), and passing in revisions previous. Sometimes, but not always it will pass on retry. So I added --no-retry for better results.

Reproduced with: I ran each test individually, not as fast/events/wheel*

run-webkit-tests fast/events/wheel* --iterations 1000 -f --debug --no-retry

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fevents%2Fwheel-event-destroys-overflow.html%20fast%2Fevents%2Fwheelevent-mousewheel-interaction.html%20fast%2Fevents%2Fwheel-event-destroys-frame.html%20fast%2Fevents%2Fwheelevent-basic.html%20fast%2Fevents%2Fwheelevent-in-text-node.html

[Radar WebKit Bug Importer]

<rdar://problem/48871828>

[Shawn Roberts]

Marked tests as flaky in https://trac.webkit.org/changeset/243498/webkit while waiting for a fix.

Issue is also affecting Mac Release WK2.

[Shawn Roberts]

Removed test expectations in https://trac.webkit.org/changeset/244698/webkit