re PR fortran/31251 (Non-integer character length leads to segfault)

	PR fortran/31251
	* simplify.c (gfc_simplify_len): Only simplify integer lengths.

From-SVN: r124415

gcc/fortran/ChangeLog

+2007-05-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR fortran/31251
+	* simplify.c (gfc_simplify_len): Only simplify integer lengths.
+
 2007-05-04  Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
 
 	PR fortran/31781

gcc/fortran/simplify.c

@@ -2136,14 +2136,15 @@ gfc_simplify_len (gfc_expr *e)
     }
 
   if (e->ts.cl != NULL && e->ts.cl->length != NULL
-      && e->ts.cl->length->expr_type == EXPR_CONSTANT)
+      && e->ts.cl->length->expr_type == EXPR_CONSTANT
+      && e->ts.cl->length->ts.type == BT_INTEGER)
     {
       result = gfc_constant_result (BT_INTEGER, gfc_default_integer_kind,
 				    &e->where);
       mpz_set (result->value.integer, e->ts.cl->length->value.integer);
       return range_check (result, "LEN");
     }
-  
+
   return NULL;
 }