[Webkit-unassigned] [Bug 194503] New: [ Mac ] REGRESSION Layout Test http/tests/misc/script-async.html is a flaky text diff failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=194503

            Bug ID: 194503
           Summary: [ Mac ] REGRESSION Layout Test
                    http/tests/misc/script-async.html is a flaky text diff
                    failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sroberts at apple.com
                CC: lforschler at apple.com

The following layout test is flaky on Mac

http/tests/misc/script-async.html

Probable cause:

Fails on current build (241262) back to oldest build I can spade (228049)

Reproducible locally with:

run-webkit-tests t241262 http/tests/misc/script-async.html --iterations 500 -f

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fmisc%2Fscript-async.html

Diff:

--- /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/http/tests/misc/script-async-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/http/tests/misc/script-async-actual.txt
@@ -1,2 +1,2 @@
 This tests for proper execution order of scripts with the async attribute https://bugs.webkit.org/show_bug.cgi?id=20710.
-PASS
+FAIL: Expected one of ' async  external  inline  DOMContentLoaded  slowAsync ' || ' external  async  inline  DOMContentLoaded  slowAsync ' || ' external  inline  async  DOMContentLoaded  slowAsync ' || ' external  inline  DOMContentLoaded  async  slowAsync ', Actual=' external  inline  DOMContentLoaded  slowAsync  async '

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