Bug 243787

Description: imported/w3c/web-platform-tests/css/cssom/getComputedStyle-detached-subtree.html The first failure I saw on the dashboard was on 7/21/2022 at 252721@main. 252720@main unified CSS property enablement and appears to be the cause. This is only affecting iOS with model iPad (5th generation). REPRODUCTION STEPS I can reproduce this on 252720@main, but am unable to reproduce it on 252719@main or earlier. Command: run-webkit-tests --ipad-simulator --model 'iPad (5th generation)' --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 --no-retry imported/w3c/web-platform-tests/css/cssom/getComputedStyle-detached-subtree.html Result: Regressions: Unexpected text-only failures (1) imported/w3c/web-platform-tests/css/cssom/getComputedStyle-detached-subtree.html [ Failure ] History: https://results.webkit.org/?model=iPad%20(5th%20generation)&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcssom%2FgetComputedStyle-detached-subtree.html&limit=50000 Diff: --- /Volumes/Data/worker/Apple-iPadOS-15-Simulator-Release-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/css/cssom/getComputedStyle-detached-subtree-expected.txt +++ /Volumes/Data/worker/Apple-iPadOS-15-Simulator-Release-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/css/cssom/getComputedStyle-detached-subtree-actual.txt @@ -1,8 +1,8 @@ PASS getComputedStyle returns no style for detached element -FAIL getComputedStyle returns no style for element in non-rendered iframe (display: none) assert_equals: expected 0 but got 393 -FAIL getComputedStyle returns no style for element in non-rendered iframe (display: none) from iframe's window assert_equals: expected 0 but got 393 -FAIL getComputedStyle returns no style for element outside the flat tree assert_equals: expected 0 but got 393 -FAIL getComputedStyle returns no style for descendant outside the flat tree assert_equals: expected 0 but got 393 +FAIL getComputedStyle returns no style for element in non-rendered iframe (display: none) assert_equals: expected 0 but got 392 +FAIL getComputedStyle returns no style for element in non-rendered iframe (display: none) from iframe's window assert_equals: expected 0 but got 392 +FAIL getComputedStyle returns no style for element outside the flat tree assert_equals: expected 0 but got 392 +FAIL getComputedStyle returns no style for descendant outside the flat tree assert_equals: expected 0 but got 392 PASS getComputedStyle returns no style for shadow tree outside of flattened tree