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Subject: [Bug fortran/44735] ICE on FORALL with character array pointer
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44735

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pault at gcc dot gnu.org,
                   |                            |tkoenig at gcc dot gnu.org
      Known to fail|                            |

--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2010-12-29 22:18:34 UTC ---
Hi Paul,

The problem may well be where Joe pointed it out.

In

  if (expr1->ts.type == BT_CHARACTER && expr1->ts.u.cl->length)
    {
      if (!expr1->ts.u.cl->backend_decl)
    {
      gfc_se tse;
      gfc_init_se (&tse, NULL);
      gfc_conv_expr (&tse, expr1->ts.u.cl->length);
      expr1->ts.u.cl->backend_decl = tse.expr;
    }
      type = gfc_get_character_type_len (gfc_default_character_kind,
                         expr1->ts.u.cl->backend_decl);
    }

the fact that expr1 has a substring reference is not taken into account,
so it might be necessary to calculate the length of the string
from expr1->ref->u.ss.end - expr1->ref.u.ss.start + 1.  You may have
to take care not to calculate any functions twice, though.

Hope this helps a little bit.