Bug 255176 – [ iOS ] 4X imported/w3c/web-platform-tests/css/css-backgrounds/ (layout-tests) are constant ImageOnlyFailures

• Status: NEW
• Component: CSS

[Robert Jenner]

imported/w3c/web-platform-tests/css/css-backgrounds/background-clip/clip-text-multi-line.html
imported/w3c/web-platform-tests/css/css-backgrounds/background-repeat-space-5.html
imported/w3c/web-platform-tests/css/css-backgrounds/background-repeat-space-4.html

are constant ImageOnly Failures on iOS 16. 

HISTORY:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-backgrounds%2Fbackground-clip%2Fclip-text-multi-line.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-backgrounds%2Fbackground-repeat-space-4.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-backgrounds%2Fbackground-repeat-space-5.html


"imported/w3c/web-platform-tests/css/css-backgrounds/background-clip/clip-text-multi-line.html"

has been failing since a Resync at https://commits.webkit.org/262694@main.

"imported/w3c/web-platform-tests/css/css-backgrounds/background-repeat-space-5.html"
"imported/w3c/web-platform-tests/css/css-backgrounds/background-repeat-space-4.html"

both started failing after we updated to iOS 16.4 this week. 

URL to DIFFS:
https://build.webkit.org/results/Apple-iOS-16-Simulator-Release-WK2-Tests/262718@main%20(2043)/results.html

The diff for all three of these indicate that they are off by .01-.02%

[Radar WebKit Bug Importer]

<rdar://problem/107771833>

[Robert Jenner]

I was able to reproduce all three ImageOnlyFailures at iOS Release ToT running the tests as follows:


run-webkit-tests --iOS-simulator <insert_test_name_here>

[Robert Jenner]

Expectations have been marked while this bug is under investigation:

https://commits.webkit.org/262734@main

[Robert Jenner]

It looks like this one is also part of this bug too:

imported/w3c/web-platform-tests/css/css-backgrounds/linear-gradient-currentcolor-first-line.html

expectations were also marked for it, and it is also reproducible.