[Webkit-unassigned] [Bug 179081] New: Layout Test imported/w3c/web-platform-tests/service-workers/service-worker/fetch-header-visibility.https.html is flaky.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=179081

            Bug ID: 179081
           Summary: Layout Test
                    imported/w3c/web-platform-tests/service-workers/servic
                    e-worker/fetch-header-visibility.https.html is flaky.
           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: jlewis3 at apple.com
                CC: cdumez at apple.com, youennf at gmail.com

imported/w3c/web-platform-tests/service-workers/service-worker/fetch-header-visibility.https.html is a flaky failure on Sierra and High Sierra testers as well as iOS release testers according to the Dashboard:
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fservice-workers%2Fservice-worker%2Ffetch-header-visibility.https.html

The test started being flaky after multiple service worker tests were un-skipped in:
https://trac.webkit.org/changeset/224218/webkit

https://build.webkit.org/results/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/r224240%20(835)/results.html
https://build.webkit.org/builders/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/builds/835

Diff:
--- /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/service-workers/service-worker/fetch-header-visibility.https-expected.txt
+++ /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/service-workers/service-worker/fetch-header-visibility.https-actual.txt
@@ -1,6 +1,6 @@


-FAIL Visibility of defaulted headers during interception assert_unreached: unexpected rejection: withUA FAIL - expected "custom_ua", got "<script src="/common/get-host-info.sub.js"></script>
+FAIL Visibility of defaulted headers during interception assert_unreached: unexpected rejection: noUA FAIL - expected "NO_UA", got "<script src="/common/get-host-info.sub.js"></script>
 <script src="test-helpers.sub.js?pipe=sub"></script>
 <script>
   var host_info = get_host_info();

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