[Webkit-unassigned] [Bug 215506] New: [ macOS ] imported/w3c/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=215506

            Bug ID: 215506
           Summary: [ macOS ]
                    imported/w3c/web-platform-tests/html/webappapis/script
                    ing/processing-model-2/unhandled-promise-rejections/pr
                    omise-rejection-events-onerror.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: hector_i_lopez at apple.com

imported/w3c/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html

Test is a flaky failure macOS according to history. The first occurrence of a failure is at r264168. Was also recorded as a flaky failure on iOS https://trac.webkit.org/changeset/249912/webkit

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fwebappapis%2Fscripting%2Fprocessing-model-2%2Funhandled-promise-rejections%2Fpromise-rejection-events-onerror.html&platform=mac&limit=50000

Diff:
--- /Volumes/Data/slave/catalina-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror-expected.txt
+++ /Volumes/Data/slave/catalina-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror-actual.txt
@@ -1,5 +1,6 @@
 CONSOLE MESSAGE: Unhandled Promise Rejection: Error: e
-CONSOLE MESSAGE: Error: e2

-PASS Throwing inside an unhandledrejection handler invokes the error handler. 
+Harness Error (TIMEOUT), message = null

+TIMEOUT Throwing inside an unhandledrejection handler invokes the error handler. Test timed out
+

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