Bug 228311 – imported/w3c/web-platform-tests/css/css-scoping/css-scoping-shadow-dynamic-remove-style-detached.html is a flaky failure

• Status: NEW
• Component: CSS

[Eric Hutchison]

imported/w3c/web-platform-tests/css/css-scoping/css-scoping-shadow-dynamic-remove-style-detached.html

is a flaky failure on Mac.

History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-scoping%2Fcss-scoping-shadow-dynamic-remove-style-detached.html&limit=50000&platform=mac

Diff:

--- /Volumes/Data/worker/bigsur-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/css/css-scoping/css-scoping-shadow-dynamic-remove-style-detached-expected.txt
+++ /Volumes/Data/worker/bigsur-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/css/css-scoping/css-scoping-shadow-dynamic-remove-style-detached-actual.txt
@@ -1,3 +1,3 @@
 
-PASS Invalidation of style data while ShadowRoot is disconnected.
+FAIL Invalidation of style data while ShadowRoot is disconnected. assert_not_equals: got disallowed value "rgb(255, 0, 0)"
 

Issue appears to be a regression ~r280122

Reproduced on r280292 using run-webkit-tests -f --iterations 500 --clobber-old-results --exit-after-n-failures 1 imported/w3c/web-platform-tests/css/css-scoping/css-scoping-shadow-dynamic-remove-style-detached.html.

Will bisect and update.

[Radar WebKit Bug Importer]

<rdar://problem/81138404>

[Eric Hutchison]

Updated test expectations at https://trac.webkit.org/changeset/280331/webkit.

[Radar WebKit Bug Importer]

<rdar://problem/81138544>

[Claudio Saavedra]

This is passing now in almost every platform but not in WPE so I am hijacking this bug for it.