[Webkit-unassigned] [Bug 187491] New: [macOS] Layout Test fast/hidpi/filters-and-image-buffer-resolution.html is flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187491

            Bug ID: 187491
           Summary: [macOS] Layout Test
                    fast/hidpi/filters-and-image-buffer-resolution.html is
                    flaky
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com

The following layout test is flaky on Sierra and High Sierra.

fast/hidpi/filters-and-image-buffer-resolution.html

Probable cause:

Unknown, this test has been flaky for a while. It fails more frequently on Debug queues.

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fhidpi%2Ffilters-and-image-buffer-resolution.html

Link to image diff, which shows that the top edge of a green square is unexpectedly blurred:
https://build.webkit.org/results/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/r233646%20(4031)/fast/hidpi/filters-and-image-buffer-resolution-diffs.html

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