[Webkit-unassigned] [Bug 196112] New: [ Mojave iOS Sim WK2] Layout Test imported/w3c/web-platform-tests/mathml/relations/css-styling/mathvariant-italic.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196112

            Bug ID: 196112
           Summary: [ Mojave iOS Sim WK2] Layout Test
                    imported/w3c/web-platform-tests/mathml/relations/css-s
                    tyling/mathvariant-italic.html is a flaky 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 Mojave, iOS SIM WK2

imported/w3c/web-platform-tests/mathml/relations/css-styling/mathvariant-italic.html

Probable cause:

Test is very flaky, and appears to have been flaky since imported. Able to reproduce locally from the oldest version I can spade (r228049) and various versions up to and including current (r243314). Same Diff produced locally that is produced by the bots.

Reproduced with:

run-webkit-tests imported/w3c/web-platform-tests/mathml/relations/css-styling/mathvariant-italic.html --iterations 500 -f

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fmathml%2Frelations%2Fcss-styling%2Fmathvariant-italic.html

Diff: 

https://build.webkit.org/results/Apple%20Mojave%20Release%20WK2%20(Tests)/r243277%20(3230)/imported/w3c/web-platform-tests/mathml/relations/css-styling/mathvariant-italic-diff.png

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