[Bug fortran/52622] ICE in gfortran 4.6.3, x86_64

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52622

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code
                 CC|                            |burnus at gcc dot gnu.org

--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-03-22 06:58:43 UTC ---
I can reproduce the failure with
  gcc-Version 4.6.2 20111011 (prerelease) [gcc-4_6-branch revision 179784]
(GCC)
  4.6.4 20120310 (prerelease) [gcc-4_6-branch revision 185168] (GCC)
however, for some reasons not with
  gcc version 4.6.2 20111212 [gcc-4_6-branch revision 182222] (SUSE Linux)

However, also with 4.8.0 20120320, I do see a failure in valgrind:

==6587== Invalid read of size 4
==6587==    at 0x5859C5: resolve_symbol(gfc_symbol*) (resolve.c:10613)
==6587==    by 0x5A3253: do_traverse_symtree(gfc_symtree*, void
(*)(gfc_symtree*), void (*)(gfc_symbol*)) (symbol.c:3386)
==6587==    by 0x58FC13: resolve_types(gfc_namespace*) (resolve.c:13961)
==6587==    by 0x58FCF7: resolve_types(gfc_namespace*) (resolve.c:13972)
==6587==    by 0x584043: gfc_resolve(gfc_namespace*) (resolve.c:14061)

 * * *

In 4.6, I have sym->formal_ns == NULL, which crashes for
"sym->formal_ns->refs++;". In case of 4.8, it is more difficult as there is no
crash for me but just the valgrind warning.