[Webkit-unassigned] [Bug 89285] New: Disappearing polyline

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=89285

           Summary: Disappearing polyline
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rasamassen at gmail.com
                CC: zimmermann at kde.org


In developing an SVG using US Census TIGER data, I found my polylines disappearing in Chrome 19. Attached is a small sample of the dataset that causes the polyline to disappear. The sample comes from the line used to draw Calhoun County, Iowa. The attached sample works as expected (line appears) in IE9, FF13, and O12.

If the user zooms out three to four times, the line magically appears. No amount of zooming in can cause the line to appear. In the attached sample, removing "-94.846508,42.560022" causes the line to reappear without changing zoom.

I'm not familiar enough with the WebKit SVG engine to know what is causing this failure, but it makes it impossible to use US Census TIGER data when all the polylines keep disappearing. Somehow, that one coordinate is causing the engine to error when drawing.

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