[Webkit-unassigned] [Bug 61174] New: REGRESSION(81992): Element position doesn't update sometimes when style.left/top and style.webkitTransform set

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=61174

           Summary: REGRESSION(81992): Element position doesn't update
                    sometimes when style.left/top and
                    style.webkitTransform set
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jamesr at chromium.org
                CC: hyatt at apple.com, mitz at webkit.org,
                    simon.fraser at apple.com


See testcase.  The issue seems to be that if style.left is set to a new value and style.webkitTransform is set to the same value it previously had ("scale(1" in this case), its layout does not update.

This caused some animation code we had to appear very jerky as sometimes the elements would stay stuck for many frames at a time.

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