From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3756 invoked by alias); 25 Jan 2012 12:48:17 -0000 Received: (qmail 3746 invoked by uid 22791); 25 Jan 2012 12:48:17 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 25 Jan 2012 12:48:04 +0000 From: "burnus at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/51995] [OOP] Polymorphic class fails at runtime Date: Wed, 25 Jan 2012 13:10:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: burnus at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-01/txt/msg02912.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51995 --- Comment #7 from Tobias Burnus 2012-01-25 12:47:49 UTC --- The problem seems to be the following: One properly calls match_typebound_call, which sets "base" (alias "primary") to the symtree of "db_connect" (which is of type BT_CLASS). Then it calls: gfc_match_varspec (primary=0x16cf3d0, equiv_flag=0, sub_flag=true, ppc_arg=true) There, the problem is that one has: sym = sym->ts.u.derived; if (sym->f2k_derived) But "sym" is only the class container. One needs sym->components->ts.u.derived->f2k_derived. One could simply do: --- a/gcc/fortran/primary.c +++ b/gcc/fortran/primary.c @@ -1911 +1911,2 @@ gfc_match_varspec (gfc_expr *primary, int equiv_flag, - sym = sym->ts.u.derived; + sym = (sym->ts.type == BT_CLASS) ? CLASS_DATA (sym)->ts.u.derived + : sym->ts.u.derived; But that will fail later with internal compiler error: in gfc_conv_component_ref, at fortran/trans-expr.c:1100