[Webkit-unassigned] [Bug 140425] New: [Win] Layout Test fast/css/crash-on-custom-cursor-when-loading.html is failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=140425

            Bug ID: 140425
           Summary: [Win] Layout Test
                    fast/css/crash-on-custom-cursor-when-loading.html is
                    failing
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

The following layout test is failing on Windows.

fast/css/crash-on-custom-cursor-when-loading.html

Probable cause:

Windows is refusing to create a DIB for the 'empty' icon during the initial load phase. This is returning a null value, which is then used in later API calls that assert that the arguments are non-null.

Solution is:
1. If the DIB cannot be created by the operating system based on the icon description, return a nullptr.
2. If the 'createSharedCursor' call returns nullptr, fall back to the default icon case so that we have something that can be used during early layout until the load finishes.

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