From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-341747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 4318 invoked by alias); 28 Dec 2010 12:23:11 -0000
Received: (qmail 4307 invoked by uid 22791); 28 Dec 2010 12:23:10 -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; Tue, 28 Dec 2010 12:23:06 +0000
From: "dfranke at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/45827] [4.6 Regression] [OOP] mio_component_ref(): Component not found
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dfranke at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: janus at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.6.0
X-Bugzilla-Changed-Fields:
Message-ID: <bug-45827-4-wOGxx0PlQG@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-45827-4@http.gcc.gnu.org/bugzilla/>
References: <bug-45827-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Date: Tue, 28 Dec 2010 12:23:00 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2010-12/txt/msg02730.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45827

--- Comment #38 from Daniel Franke <dfranke at gcc dot gnu.org> 2010-12-28 12:22:48 UTC ---
Created attachment 22856
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22856
testcase, ICE with patch in comment #35

(In reply to comment #37)
> > I managed to get an ICE with your version (sym == NULL)
> 
> No, that's not possible. My version (i.e. comment #35) is inserted at a
> slightly different place than yours, where the existence of 'sym' is already
> established.

Err, sure it is possible:

+      if (sym->attr.is_class)
+       sym = sym->components->ts.u.derived;

After this, sym is not checked any more and the ICE occurs in the next line:

       if (sym->components != NULL && p->u.pointer == NULL)
           ^^^

That's why I moved it up a few lines and double check that sym really is
non-NULL.