[Webkit-unassigned] [Bug 231845] New: REGRESSION (r283935): imported/w3c/web-platform-tests/shadow-dom/focus/focus-pseudo-matches-on-shadow-host.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231845

            Bug ID: 231845
           Summary: REGRESSION (r283935):
                    imported/w3c/web-platform-tests/shadow-dom/focus/focus
                    -pseudo-matches-on-shadow-host.html is a flaky failure
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com
                CC: ntim at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com

imported/w3c/web-platform-tests/shadow-dom/focus/focus-pseudo-matches-on-shadow-host.html has become a flaky failure after https://trac.webkit.org/changeset/283935/webkit

--- /Volumes/Data/worker/catalina-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/shadow-dom/focus/focus-pseudo-matches-on-shadow-host-expected.txt
+++ /Volumes/Data/worker/catalina-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/shadow-dom/focus/focus-pseudo-matches-on-shadow-host-actual.txt
@@ -1,9 +1,11 @@


-PASS :focus must not match a shadow host with open mode shadow root that does not contain the focused element
-PASS :focus must match a shadow host with open mode shadow root that contains the focused element
-PASS :focus must not match a shadow host with open mode shadow root contains the focused element assigned to a slot
-PASS :focus must not match a shadow host with closed mode shadow root that does not contain the focused element
-PASS :focus must match a shadow host with closed mode shadow root that contains the focused element
-PASS :focus must not match a shadow host with closed mode shadow root contains the focused element assigned to a slot
+Harness Error (TIMEOUT), message = null

+TIMEOUT :focus must not match a shadow host with open mode shadow root that does not contain the focused element Test timed out
+NOTRUN :focus must match a shadow host with open mode shadow root that contains the focused element
+NOTRUN :focus must not match a shadow host with open mode shadow root contains the focused element assigned to a slot
+NOTRUN :focus must not match a shadow host with closed mode shadow root that does not contain the focused element
+NOTRUN :focus must match a shadow host with closed mode shadow root that contains the focused element
+NOTRUN :focus must not match a shadow host with closed mode shadow root contains the focused element assigned to a slot
+

https://build.webkit.org/results/Apple-Catalina-Release-WK1-Tests/r284277%20(6392)/results.html

https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fshadow-dom%2Ffocus%2Ffocus-pseudo-matches-on-shadow-host.html

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