[Webkit-unassigned] [Bug 121054] New: ASSERTION FAILED: mainAxisExtent - mainAxisBorderAndPaddingExtentForChild(child) >= 0

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=121054

           Summary: ASSERTION FAILED: mainAxisExtent -
                    mainAxisBorderAndPaddingExtentForChild(child) >= 0
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jpfau at apple.com


Created an attachment (id=211100)
 --> (https://bugs.webkit.org/attachment.cgi?id=211100&action=review)
Repro

The assertion mainAxisExtent - mainAxisBorderAndPaddingExtentForChild(child) >= 0 in RenderFlexibleBox::preferredMainAxisContentExtentForChild(WebCore::RenderBox *, bool) can fail in certain cases. A simple repro case is attached.

<rdar://problem/14933505>

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