[LLVMbugs] [Bug 6927] New: [NSAttributedString initWithString:] with a nil string will raise an exception in post-Leopard linked apps

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6927

           Summary: [NSAttributedString initWithString:] with a nil string
                    will raise an exception in post-Leopard linked apps
           Product: clang
           Version: unspecified
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Static Analyzer
        AssignedTo: kremenek at apple.com
        ReportedBy: alex at kempgen.de
                CC: llvmbugs at cs.uiuc.edu


Even though this is not explicitly stated in Apple's class reference, a console
log entry warns that calling [NSAttributedString initWithString:] with a nil
string will raise an exception in post-Leopard linked apps:

"-[NSConcreteAttributedString initWithString:] called with nil string argument.
This has undefined behavior and will raise an exception in post-Leopard linked
apps. This warning is displayed only once."

the static analyzer could assist finding cases where the string that's being
passed along is nil.


version = the one that shipped with xcode 3.2.2

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