[LLVMbugs] [Bug 8689] New: false positive due to not analyzing value dependencies

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8689

           Summary: false positive due to not analyzing value dependencies
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
        AssignedTo: kremenek at apple.com
        ReportedBy: korgulec at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Static analyzer for the attached file reports that:

/tmp/test.c:17:28: warning: Access to field 'a' results in a dereference of a
null pointer (loaded from variable 'X')
  return error ? NULL : X->a;
                        ~  ^

But clearly when X is dereferenced it cannot be NULL.

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