[Webkit-unassigned] [Bug 287649] New: REGRESSION(285183 at main): [ iOS Debug ] compositing/repaint/scroller-repaints-once.html is a constant crash.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=287649

            Bug ID: 287649
           Summary: REGRESSION(285183 at main): [ iOS Debug ]
                    compositing/repaint/scroller-repaints-once.html is a
                    constant crash.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: y_karimi at apple.com
                CC: simon.fraser at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com

Created attachment 474223

  --> https://bugs.webkit.org/attachment.cgi?id=474223&action=review

scroller-repaints-once-stderr.txt

compositing/repaint/scroller-repaints-once.html

This test is constantly crashing on iOS Debug.

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=compositing%2Frepaint%2Fscroller-repaints-once.html&platform=ios&recent=false

STDERR:

Attached

REPRODUCIBILITY:

I was able to reproduce this issue on the iOS 18.2 simulator at ToT using the following command:

run-webkit-tests --ios-simulator --child-processes 1 --debug compositing/repaint/scroller-repaints-once.html --iterations 50

REGRESSION:

I was able to bisect a regression point: this test reproduced at 285183 at main, but it did not reproduce at 285182 at main or prior. Changes at 285183 at main is likely what caused the crashes.

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