[Webkit-unassigned] [Bug 255001] New: REGRESSION(262547 at main): Multiple layout tests crash when decoding a null ShareableBitmapHandle

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255001

            Bug ID: 255001
           Summary: REGRESSION(262547 at main): Multiple layout tests crash
                    when decoding a null ShareableBitmapHandle
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

The change 262547 at main adds the assertion `ASSERT(!m_size.isEmpty());` in all the ShareableBitmapConfiguration constructors. However one of them is called when decoding a null ShareableBitmapHandle in UIProcess which has m_size.isEmpty() true. The corresponding ShareableBitmapConfiguration was created with the default constructor in WebProcess.

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