Bug 225830 – [ iOS14-Simulator ] wk2imported/w3c/web-platform-tests/css/css-will-change/will-change-transform-huge-offset-scrolled.html is a flaky ImageOnlyFailure

• Status: NEW
• Component: CSS

[Robert Jenner]

imported/w3c/web-platform-tests/css/css-will-change/will-change-transform-huge-offset-scrolled.html 

is a flaky imageonlyfailure on iOS 14-Simulator wk2. 

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-will-change%2Fwill-change-transform-huge-offset-scrolled.html

DIFF IMAGE LINK:
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r277496%20(1457)/imported/w3c/web-platform-tests/css/css-will-change/will-change-transform-huge-offset-scrolled-diffs.html

Images attached below.

[Robert Jenner]

Created attachment 428671 [details]
Image Diffs for flaky failure

Attaching image diffs from flaky failing test.

[Robert Jenner]

The test is also causing a slow down on EWS here:
https://ews-build.webkit.org/#/builders/51

[Robert Jenner]

It appears the tests were re-imported at r277081:
https://trac.webkit.org/changeset/277081/webkit

[Robert Jenner]

It also appears that this has been flaky failing since the test was re-imported.

I have updated the expectations to Pass ImageOnlyFailure here since it was causing a slow-down for EWS:
https://trac.webkit.org/changeset/277511/webkit

[Robert Jenner]

I was able to reproduce the failure at iOS-14-Simulator Production ToT using the following test:

run-webkit-tests --ios-simulator imported/w3c/web-platform-tests/css/css-will-change/will-change-transform-huge-offset-scrolled.html --iterations 100 -f

[Radar WebKit Bug Importer]

<rdar://problem/78035845>