[LLVMbugs] [Bug 23310] New: llvm-dis crashes

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23310

            Bug ID: 23310
           Summary: llvm-dis crashes
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: chengniansun at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14238
  --> https://llvm.org/bugs/attachment.cgi?id=14238&action=edit
test case to crash llvm-dis

I used llvm to parse bitcode files, but my program crashed when parsing the
attached bitcode file. I then tried llvm-dis, and it also crashed. 

$: /usr/local/clang-trunk/bin/llvm-dis main/libwebp-0.4.0/src/dsp/dec_sse2.bc
0  llvm-dis        0x000000000051114a
1  llvm-dis        0x00000000005125cb
2  libpthread.so.0 0x00007fc9afbc8340
3  libpthread.so.0 0x0000000001653ba9
Stack dump:
0.      Program arguments: /usr/local/clang-trunk/bin/llvm-dis
main/libwebp-0.4.0/src/dsp/dec_sse2.bc 
Segmentation fault (core dumped)
$: clang-trunk -v
clang version 3.7.0 (trunk 235404)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.0.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.0.0
Found candidate GCC installation:
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.6.3
Found candidate GCC installation:
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.7.4
Found candidate GCC installation:
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.8.2
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$:

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