Bug 217478

Description:
imported/w3c/web-platform-tests/css/css-masking/clip-path/clip-path-descendant-text-mutated-001.html

The first flaky image failure that I see this on the dashboard was 10/07/20 at r268142, but is not relevant to what would have caused this.

The test is part of an import of all clip-path WPTs at r268138 and has been a flaky image failure since it was introduced.

The test was expecting a width: 100px; height: 100px; background-color: green, but instead returned and additional width: 100px; height: 100px; background-color: red.

REPRODUCTION STEPS
Command: 
run-webkit-tests -1 imported/w3c/web-platform-tests/css/css-masking/clip-path/clip-path-descendant-text-mutated-001.html

Result: 
Regressions: Unexpected image-only failures (1)
  imported/w3c/web-platform-tests/css/css-masking/clip-path/clip-path-descendant-text-mutated-001.html [ ImageOnlyFailure ]

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-masking%2Fclip-path%2Fclip-path-descendant-text-mutated-001.html&version_name=Catalina&version_name=Mojave&flavor=wk1&limit=50000

Image Results:
https://build.webkit.org/results/Apple-Catalina-Release-WK1-Tests/r268179%20(9704)/imported/w3c/web-platform-tests/css/css-masking/clip-path/clip-path-descendant-text-mutated-001-diffs.html