[LLVMbugs] [Bug 15373] New: Non-deterministic bug warning report with alpha.unix.Stream checker.

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Feb 27 03:00:12 PST 2013


            Bug ID: 15373
           Summary: Non-deterministic bug warning report with
                    alpha.unix.Stream checker.
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
          Assignee: kremenek at apple.com
          Reporter: marco.grossi at studenti.unipr.it
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 10094
  --> http://llvm.org/bugs/attachment.cgi?id=10094&action=edit
Test case and plist output

The repeated execution of the following analysis on the attached test case:
 clang++ --analyze -Xclang -analyzer-checker=alpha.unix.Stream

shows two different results: none or one bug warning report; look at the two
attached ".plist" file.

Trunk revision: 176090.
Build version: Debug+Asserts.

E.g. repeating 1000 times the analysis, on one test node I get 62% warning
output(Arch Linux, not virtualized, llvm/clang builded with: clang 3.2), on an
other 24% (Ubuntu 10.04, virtual machine, gcc 4.4.3).

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