Playing with the code reduction tools, i produced a segfault with the following
(incomplete) code:
=======================================
template < typename T >
void f ( )
{
unsigned n ( ) ;
#pragma omp parallel num_threads(n)
=======================================
$ /suse/NOBACKUP/gcc/gcc-4.2-branch/bin/g++ -v -march=i686 -O3 -fopenmp -W
-Wall -c segfault2.ii
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4_2-branch/configure --enable-languages=c,c++
--prefix=/suse/NOBACKUP/gcc/gcc-4.2-branch
Thread model: posix
gcc version 4.2.2 20070910 (prerelease)
/suse/NOBACKUP/gcc/gcc-4.2-branch/libexec/gcc/i686-pc-linux-gnu/4.2.2/cc1plus
-fpreprocessed segfault2.ii -quiet -dumpbase segfault2.ii -march=i686 -auxbase
segfault2 -O3 -W -Wall -version -fopenmp -o /tmp/ccUQF7PA.s
GNU C++ version 4.2.2 20070910 (prerelease) (i686-pc-linux-gnu)
compiled by GNU C version 4.2.2 20070908 (prerelease).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 4c766e638e42be49e7fc1a3400590598
segfault2.ii: In function void f():
segfault2.ii:5: internal compiler error: Segmentation fault
without -fopenmp, I get
segfault2.ii:5: warning: ignoring #pragma omp parallel
segfault2.ii:4: error: expected `}' at end of input
--
Summary: segfault on incomplete code in openmp mode
Product: gcc
Version: 4.2.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: gcc at abeckmann dot de
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33372
