Index: frontend-passes.c
===================================================================
--- frontend-passes.c	(Revision 193793)
+++ frontend-passes.c	(Arbeitskopie)
@@ -1277,8 +1277,12 @@ doloop_code (gfc_code **c, int *walk_subtrees ATTR
       break;
 
     case EXEC_CALL:
-      f = co->symtree->n.sym->formal;
 
+      if (co->resolved_sym == NULL)
+	break;
+
+      f = co->resolved_sym->formal;
+
       /* Withot a formal arglist, there is only unknown INTENT,
 	 which we don't check for.  */
       if (f == NULL)