[Webkit-unassigned] [Bug 6770] New: REGRESSION: Incomplete repaint when block with clipping grows

[bugzilla-daemon at opendarwin.org]

http://bugzilla.opendarwin.org/show_bug.cgi?id=6770

           Summary: REGRESSION: Incomplete repaint when block with clipping
                    grows
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: opendarwin.org at mitzpettel.com


See the attached testcase. In this case, since the block with the border grows
and repaints before its container (which is clipping) grows, so in
RenderObject::repaintAfterLayoutIfNeeded it sees that its old bounds are equal
to its new bounds and it doesn't repaint. When the container repaints, it
paints only the delta, so the old border of the inner block isn't erased.


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