[LLVMbugs] [Bug 16945] New: clang analyzer crash when compiling hash.c from bahamut ircd.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16945

            Bug ID: 16945
           Summary: clang analyzer crash when compiling hash.c from
                    bahamut ircd.
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
          Assignee: kremenek at apple.com
          Reporter: crigler at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11074
  --> http://llvm.org/bugs/attachment.cgi?id=11074&action=edit
reduced test case

The attached reduced test case (from bahamut's hash.c) crashes the clang static
analyzer:

clang --analyze -Xanalyzer -analyzer-checker=alpha.security.ArrayBoundV2
-Xanalyzer -analyzer-checker=alpha.deadcode.IdempotentOperations hash.c
0  clang           0x0000000001c209d2 llvm::sys::PrintStackTrace(_IO_FILE*) +
34
1  clang           0x0000000001c207c9
2  libpthread.so.0 0x00007f24f6877030
3  clang           0x000000000105ae1a
clang::CFGReverseBlockReachabilityAnalysis::isReachable(clang::CFGBlock const*,
clang::CFGBlock const*) + 26
4  clang           0x0000000000db0228
5  clang           0x0000000000ebde44
clang::ento::CheckerManager::runCheckersForEndAnalysis(clang::ento::ExplodedGraph&,
clang::ento::BugReporter&, clang::ento::ExprEngine&) + 100
6  clang           0x0000000000ec7caf
clang::ento::CoreEngine::ExecuteWorkList(clang::LocationContext const*,
unsigned int, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) + 239
7  clang           0x0000000000d76ee6
8  clang           0x0000000000d77fae
9  clang           0x0000000000d7fdce
10 clang           0x0000000000a0b85a clang::ParseAST(clang::Sema&, bool, bool)
+ 538
11 clang           0x0000000000759809 clang::FrontendAction::Execute() + 185
12 clang           0x000000000073a49a
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 282
13 clang           0x0000000000723f9a
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1530
14 clang           0x000000000071f848 cc1_main(char const**, char const**, char
const*, void*) + 824
15 clang           0x000000000070fb5a main + 1402
16 libc.so.6       0x00007f24f5728ead __libc_start_main + 253
17 clang           0x000000000071f36d

clang version 3.4 (http://llvm.org/git/clang.git
d9def9e75e6fae8f215223da4e78c7ec7e3fa4ac) (http://llvm.org/git/llvm.git
7b0a79601b277581dc3c089af71fed641887c38d)
Target: x86_64-unknown-linux-gnu
compiled with gcc version 4.7.2 (Debian 4.7.2-5)

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