[Webkit-unassigned] [Bug 56596] New: Overlay scrollbars sometimes fail to appear

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=56596

           Summary: Overlay scrollbars sometimes fail to appear
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bdakin at apple.com


* SUMMARY
The overlay scrollbars fail to appear sometimes… it is pretty reproducible, and has something to do with beginning a scroll while they scrollbars are fading out.

* STEPS TO REPRODUCE
1. Using a build with overlay scrollbars, go to a website with a vertical scrollbar
2. Use trackpad to scroll
3. Briefly stop scrolling; leave your 2 fingers on the trackpad
4. When the scrollbars start to fade away, resume scrolling

* RESULTS
If you time it just right, the scrollbars won't re-appear.  You can scroll just fine, there is just no visual scrollbar.

<rdar://problem/8953779>

Patch forthcoming.

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