[Webkit-unassigned] [Bug 124415] New: Adding a class to the body which alters appearance crashes WebCore

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=124415

           Summary: Adding a class to the body which alters appearance
                    crashes WebCore
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
               URL: http://author.economiacms.progressivecp.com/editions/c
                    om.progressivecp.economia.issue22/data/1209/index.html
                    ?preview
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: nicholas.helke at kaldorgroup.com


Opening the specified page and adding the "nightmode" to the body element causes WebCore to crash in WebCore::InlineFlowBox::deleteLine with a BAD_EXEC_ERROR on iOS and Mac.

Steps to reproduce:

1) Open specified page
2) Add the class "nightmode" to the body by seemingly any means (through the inspector or using javascript)

WebCore crashes.

Additional details:

1) This does not happen with Safari 6.0.2 (8536.26.17).
2) Eliminating the below CSS seems to work around the crash but breaks the design of other pages.
    body.nightmode article p:first-of-type::first-letter {
      color: white;
    }

I am not sure WebCore Misc. is the right component. This is a guess based on the backtrace.

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