Bug 228311

Summary: imported/w3c/web-platform-tests/css/css-scoping/css-scoping-shadow-dynamic-remove-style-detached.html is a flaky failure
Product: WebKit Reporter: Eric Hutchison <ehutchison>
Component: CSSAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: clopez, ehutchison, koivisto, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Eric Hutchison 2021-07-26 17:29:03 PDT
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.
Comment 1 Radar WebKit Bug Importer 2021-07-26 17:30:43 PDT
<rdar://problem/81138404>
Comment 2 Eric Hutchison 2021-07-26 17:34:51 PDT
Updated test expectations at https://trac.webkit.org/changeset/280331/webkit.
Comment 3 Radar WebKit Bug Importer 2021-07-26 17:35:06 PDT
<rdar://problem/81138544>