[Bug c/53010] New: crash due to null ptr deref

[regehr at cs dot utah.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53010

             Bug #: 53010
           Summary: crash due to null ptr deref
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: reg...@cs.utah.edu
                CC: cheny...@cs.utah.edu


[regehr@dyson r35]$ current-gcc -m32 -O3 small.c -c
small.c: In function 'fn1':
small.c:3:1: internal compiler error: Segmentation fault
 fn1 ()
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


[regehr@dyson r35]$ cat small.c
int a, b, c, d, e;
void
fn1 ()
{
    d = 0;
    for (; d <= 1; d++)
        ;
    for (; a; a--)
        e = d | b || c;
}


[regehr@dyson r35]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r186501-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r186501-install
--program-prefix=r186501- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120416 (experimental) (GCC)