[Webkit-unassigned] [Bug 240495] New: REGRESSION (r294215): [ iOS ] Nine fast tests are a consistent image failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=240495

            Bug ID: 240495
           Summary: REGRESSION (r294215): [ iOS ] Nine fast tests are a
                    consistent image 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: rackler at apple.com

Description:
fast/css/paint-order-shadow.html
fast/forms/ios/focus-ring-size.html
fast/inline/hidpi-outline-auto-negative-offset-with-border-radius.html
fast/inline/hidpi-outline-auto-with-border-radius-horizontal-ltr.html
fast/inline/hidpi-outline-auto-with-border-radius-horizontal-rtl.html
fast/inline/hidpi-outline-auto-with-border-radius-vertical-ltr.html
fast/inline/hidpi-outline-auto-with-border-radius-vertical-rtl.html
fast/inline/hidpi-outline-auto-with-fractional-radius.html
fast/inline/hidpi-outline-auto-with-one-focusring-rect.html

The first failure I saw on the dashboard was on 5/15/2022 at r294215.  r294215 modified use of WebCore::IOSurface has WebCore::GraphicsContext so that probably introduced the consistent image failure. 

REPRODUCTION STEPS
I can reproduce this on r294215, but unable to reproduce on r294214 or earlier.

Command: 
run-webkit-tests --root 294215 --ios-simulator --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 --no-retry fast/inline/hidpi-outline-auto-with-border-radius-horizontal-rtl.html

Result: 
Regressions: Unexpected image-only failures (1)
  fast/inline/hidpi-outline-auto-with-border-radius-horizontal-rtl.html [ ImageOnlyFailure ]

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=fast%2Finline%2Fhidpi-outline-auto-with-border-radius-horizontal-ltr.html&test=fast%2Finline%2Fhidpi-outline-auto-with-border-radius-vertical-ltr.html&test=fast%2Finline%2Fhidpi-outline-auto-with-border-radius-vertical-rtl.html&test=css3%2Fcolor-filters%2Fsvg%2Fcolor-filter-inline-svg.html&test=fast%2Fcss%2Fpaint-order-shadow.html&test=fast%2Fforms%2Fios%2Ffocus-ring-size.html&test=fast%2Finline%2Fhidpi-outline-auto-with-fractional-radius.html&test=fast%2Finline%2Fhidpi-outline-auto-with-one-focusring-rect.html&test=css3%2Fcolor-filters%2Fsvg%2Fcolor-filter-inline-svg.html&test=fast%2Fcss%2Fpaint-order-shadow.html&test=fast%2Fforms%2Fios%2Ffocus-ring-size.html&limit=50000&platform=ios

Image Diff:
fast/css/paint-order-shadow.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/css/paint-order-shadow-diffs.html

fast/forms/ios/focus-ring-size.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/forms/ios/focus-ring-size-diffs.html

fast/inline/hidpi-outline-auto-negative-offset-with-border-radius.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-negative-offset-with-border-radius-diffs.html

fast/inline/hidpi-outline-auto-with-border-radius-horizontal-ltr.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-with-border-radius-horizontal-ltr-diffs.html

fast/inline/hidpi-outline-auto-with-border-radius-horizontal-rtl.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-with-border-radius-horizontal-rtl-diffs.html

fast/inline/hidpi-outline-auto-with-border-radius-vertical-ltr.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-with-border-radius-vertical-ltr-diffs.html

fast/inline/hidpi-outline-auto-with-border-radius-vertical-rtl.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-with-border-radius-vertical-rtl-diffs.html

fast/inline/hidpi-outline-auto-with-fractional-radius.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-with-fractional-radius-diffs.html

fast/inline/hidpi-outline-auto-with-one-focusring-rect.html
https://build.webkit.org/results/Apple-iOS-15-Simulator-Release-GPUProcess-arm64-WK2-Tests/250573@main%20(1679)/fast/inline/hidpi-outline-auto-with-one-focusring-rect-diffs.html

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