[LLVMbugs] [Bug 16021] New: False positive: Undefined or garbage value returned to caller

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16021

            Bug ID: 16021
           Summary: False positive: Undefined or garbage value returned to
                    caller
           Product: clang
           Version: 3.1
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
          Assignee: kremenek at apple.com
          Reporter: kyle at omnigroup.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 10519
  --> http://llvm.org/bugs/attachment.cgi?id=10519&action=edit
A program which causes the analyzer to emit a spurious "Undefined or garbage
value returned to caller" warning

The attached program causes the analyzer to emit "Undefined or garbage value
returned to caller" for the return value of -cachedObjectWithNumber:. The
analyzer seems to skip over the execution of the while loop entirely, even
though by virtue of the enclosing if statement, it is guaranteed to execute at
least once.

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