[Webkit-unassigned] [Bug 192056] New: Incorrect scroll latching with overflow inside abspos

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=192056

            Bug ID: 192056
           Summary: Incorrect scroll latching with overflow inside abspos
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

Created attachment 355818

  --> https://bugs.webkit.org/attachment.cgi?id=355818&action=review

Testcase

In the attached test case, try scrolling over the smaller purple-bordered element. Sometimes, when it's already at the bottom, the main page refuses to scroll.

For some reason the latching state doesn't think that we started while the small scrollers was at the end of its travel.

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