[Webkit-unassigned] [Bug 221731] New: [ MacOS Debug wk2] imported/w3c/web-platform-tests/worklets/animation-worklet-service-worker-interception.https.html is a flakey text failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221731

            Bug ID: 221731
           Summary: [ MacOS Debug wk2]
                    imported/w3c/web-platform-tests/worklets/animation-wor
                    klet-service-worker-interception.https.html is a
                    flakey text failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Jenner at apple.com

imported/w3c/web-platform-tests/worklets/animation-worklet-service-worker-interception.https.html

Is a flakey text failure in macOS Debug for both Catalina and Big Sur in wk2. 

HISTORY URL:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fworklets%2Fanimation-worklet-service-worker-interception.https.html&platform=mac

DIFF URL:
https://build.webkit.org/results/Apple-BigSur-Debug-WK2-Tests/r272683%20(70)/imported/w3c/web-platform-tests/worklets/animation-worklet-service-worker-interception.https-pretty-diff.html

DIFF TEXT:
--- /Volumes/Data/slave/bigsur-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/worklets/animation-worklet-service-worker-interception.https-expected.txt
+++ /Volumes/Data/slave/bigsur-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/worklets/animation-worklet-service-worker-interception.https-actual.txt
@@ -1 +1,5 @@

+FAIL addModule() on a controlled document should be intercepted by a service worker. assert_equals: expected (string) "RESOLVED" but got (object) object "[object Object]"
+FAIL addModule() on a non-controlled document should not be intercepted by a service worker even if the script is under the service worker scope. assert_equals: expected (string) "REJECTED" but got (object) object "[object Object]"
+FAIL Static import should be intercepted by a service worker. assert_equals: expected (string) "RESOLVED" but got (object) object "[object Object]"
+

Was able to reproduce same failure as above in r272683 using the following test:

run-webkit-test imported/w3c/web-platform-tests/worklets/animation-worklet-service-worker-interception.https.html --iterations 1000 -f --debug

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