[LLVMbugs] [Bug 10934] New: Static analyzer complains about "atoi loop"

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Sep 15 10:53:28 PDT 2011


           Summary: Static analyzer complains about "atoi loop"
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
        AssignedTo: kremenek at apple.com
        ReportedBy: mclow at qualcomm.com
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=7277)
 --> (http://llvm.org/bugs/attachment.cgi?id=7277)
A small sample that shows the same error as OpenSSL

MacBook pro/10.6.8/clang build from this morning's TOT (r139789), running the
static analyzer on OpenSSL 1.0.0e, I got an error:
           "The left operand to '+' is always 0"

Certainly this is true - the first time through the loop - but not afterwards.

I submit that this is a "bad error" - it flags correct code.

reduced test case attached.

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