From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-prs-return-34578-listarch-gcc-prs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 5246 invoked by alias); 8 May 2003 23:02:48 -0000
Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Archive: <http://gcc.gnu.org/ml/gcc-prs/>
List-Post: <mailto:gcc-prs@gcc.gnu.org>
List-Help: <mailto:gcc-prs-help@gcc.gnu.org>
Sender: gcc-prs-owner@gcc.gnu.org
Received: (qmail 5216 invoked by uid 48); 8 May 2003 23:02:47 -0000
Date: Thu, 08 May 2003 23:02:00 -0000
Message-ID: <20030508230247.5214.qmail@sources.redhat.com>
To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org,
  seth.goldberg@sun.com
From: bangerth@dealii.org
Reply-To: bangerth@dealii.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
  nobody@gcc.gnu.org, seth.goldberg@sun.com, gcc-gnats@gcc.gnu.org
Subject: Re: c++/5754: [3.3 regression] [2003-05-06] g++ segfaults on compilation of template-enriched code
X-SW-Source: 2003-05/txt/msg00666.txt.bz2
List-Id: <gcc-prs.sourceware.org>

Old Synopsis: [2003-01-21] g++ segfaults on compilation of template-enriched code
New Synopsis: [3.3 regression] [2003-05-06] g++ segfaults on compilation of template-enriched code

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Thu May  8 23:02:47 2003
State-Changed-Why:
    This is actually related to something that has been
    recently fixed:
    ----------------------------
    struct P {};
    
    template <typename >
    struct O 
    {
        struct I;
    };
    
    template <typename T>
    struct O<T>::I::S : P
    {};
    -------------------------
    Note that S doesn't exist, since I isn't declared (except
    for the forward declaration, of course). If I isn't
    derived from P, then we get a proper error message since
    recently. If it is, as in the snippet above, then we get
    an ICE with 3.3, and a tree checking error in 3.4:
    
    g/x> /home/bangerth/bin/gcc-3.3-pre/bin/c++ -c x.cc
    x.cc:11: internal compiler error: Segmentation fault
    Please submit a full bug report,
    with preprocessed source if appropriate.
    See <URL:http://gcc.gnu.org/bugs.html> for instructions.
    
    
    g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
    x.cc:10: error: could not resolve typename type
    x.cc:10: internal compiler error: tree check: expected class 'd', have 'x' (
       error_mark) in cp_parser_class_head, at cp/parser.c:11804
    Please submit a full bug report,
    with preprocessed source if appropriate.
    See <URL:http://gcc.gnu.org/bugs.html> for instructions.
    
    Note that 3.3 doesn't give an error message before
    crashing. On the other hand, 2.95 at least said
    
    g/x> c++ -c x.cc
    x.cc:10: `typename O<{anonymous template type parm}>::I' does not have a nested type named `S'
    x.cc:10: template class without a name
    x.cc:10: template class without a name
    x.cc:11: confused by earlier errors, bailing out
    
    I think this is thus a regression of sorts.
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5754