[Webkit-unassigned] [Bug 78435] New: UString.h will crash if is8bit is checked and UString::isNull() == true

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=78435

           Summary: UString.h will crash if is8bit is checked and
                    UString::isNull() == true
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: atreat at rim.com


If you look at UString.h it seems that it is just a wrapper around WTF::StringImpl.  Most of the functions in UString.h check if it is null, but not UString::is8bit.  This can lead to a null pointer de-reference.  For instance, if you do this...

    m_mainFrame->script()->evaluateInWorld(ScriptSourceCode(""), ...);

Now, we shouldn't be doing his, but we also shouldn't crash because of it.

Adam

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