[Webkit-unassigned] [Bug 249392] New: [ macOS iOS ] imported/w3c/web-platform-tests/html/cross-origin-opener-policy/reporting/navigation-reporting/reporting-coop-navigated-popup.https.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=249392

            Bug ID: 249392
           Summary: [ macOS iOS ]
                    imported/w3c/web-platform-tests/html/cross-origin-open
                    er-policy/reporting/navigation-reporting/reporting-coo
                    p-navigated-popup.https.html is a flaky 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: rackler at apple.com

Description:
imported/w3c/web-platform-tests/html/cross-origin-opener-policy/reporting/navigation-reporting/reporting-coop-navigated-popup.https.html

The test was added as a resync all remaining web-platform-tests/html tests from upstream at 226895 at main and consistently passed. The first failure I saw on the dashboard was approximately 11/27/2021 at 244573 at main.

I can reproduce this on ToT using the command:
run-webkit-tests --release -f --clobber-old-results --exit-after-n-failures 1  --force  --child-processes=5 --iterations=50   imported/w3c/web-platform-tests/html/cross-origin-opener-policy/reporting/navigation-reporting/reporting-coop-navigated-popup.https.html

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcross-origin-opener-policy%2Freporting%2Fnavigation-reporting%2Freporting-coop-navigated-popup.https.html&platform=ios&platform=mac&recent=false&limit=50000

Diff:
@@ -1,3 +1,4 @@
+CONSOLE MESSAGE: Fetch API cannot load https://localhost:9443/common/dispatcher/dispatcher.py?uuid=761227e0-408e-428f-8918-5bb4b6c62b51 due to access control checks.

 PASS Open a popup to a document without COOP, then navigate it to a document with
 PASS verify remaining reports

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