[Bug fortran/32179] New: Ensure that ss->string_length is always set [TODO item]

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Just to now forget ...

To the patch to PR 32156, Paul Thomas wrote in
http://gcc.gnu.org/ml/fortran/2007-05/msg00531.html :

"There is something not right with string concatenation
in the front-end that fails to transmit the string length correctly.
I have made several attempts to get to the bottom of this and have
completely failed. "

Test case, see PR 32156 and revert the "hack" (see urls and patch at the
bottom) .

Commits:
http://gcc.gnu.org/ml/gcc-cvs/2007-05/msg00956.html
http://gcc.gnu.org/ml/gcc-cvs/2007-05/msg00955.html

Comment in the patch:
-      ss->expr->ts.cl->backend_decl = ss->string_length;
+      /* It is surprising but still possible to wind up with expressions that
+        lack a character length.
+        TODO Find the offending part of the front end and cure this properly.
+        Concatenation involving arrays is the main culprit.  */
+      if (!ss->expr->ts.cl)
+       {
+         ss->expr->ts.cl = gfc_get_charlen ();
+         ss->expr->ts.cl->next = gfc_current_ns->cl_list;
+         gfc_current_ns->cl_list = ss->expr->ts.cl->next;
+       }


-- 
           Summary: Ensure that ss->string_length is always set [TODO item]
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32179