[Webkit-unassigned] [Bug 87194] New: Some renderers in the Web Inspector interface have negative widths

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87194

           Summary: Some renderers in the Web Inspector interface have
                    negative widths
           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: simon.fraser at apple.com
                CC: mitz at webkit.org


Dumping the layer tree for some inspector content, I see:

      layer 0x112dc2a58 at (0,34) size 795x80 (composited, bounds=at (0,0) size 0x0, drawsContent=0, paints into ancestor=0)
        RenderBlock (positioned) 0x112dc2988 zI: 300 {DIV} at (0,0) size 795x80 class="resources-event-dividers"
      layer 0x112da6968 at (785,124) size -5x153
        RenderBlock (positioned) 0x112da6748 zI: 300 {DIV} at (0,0) size -5x153 class="resources-event-dividers"
      layer 0x112d9fbb8 at (-3,34) size 5x20 backgroundClip at (0,34) size 800x243 clip at (0,34) size 800x243 outlineClip at (0,34) size 800x243
        RenderBlock (positioned) 0x112d9fae8 zI: 500 {DIV} at (-3,0) size 5x20 [bgcolor=#999999] class="timeline-window-resizer"
      layer 0x11b30e1a8 at (797,34) size 5x20 backgroundClip at (0,34) size 800x243 clip at (0,34) size 800x243 outlineClip at (0,34) size 800x243
        RenderBlock (positioned) 0x112da01d8 zI: 500 {DIV} at (797,0) size 5x20 [bgcolor=#999999] class="timeline-window-resizer timeline-window-resizer-right"
      layer 0x112da7418 at (0,124) size 5x153

Note the "size -5x153" which means that a renderer got a negative width somehow. That should never happen.

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