From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-420286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 29106 invoked by alias); 15 Apr 2013 07:39:29 -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
Received: (qmail 29080 invoked by uid 48); 15 Apr 2013 07:39:25 -0000
From: "dimhen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/56961] New: cycle between do_spec_1() / process_brace_body() / handle_braces()
Date: Mon, 15 Apr 2013 07:39:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dimhen at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-56961-4@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
X-SW-Source: 2013-04/txt/msg01431.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56961

             Bug #: 56961
           Summary: cycle between do_spec_1() / process_brace_body() /
                    handle_braces()
    Classification: Unclassified
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dimhen@gmail.com


$ cat x.cpp 
struct foo { };
  typedef struct
  {
      volatile foo fields;
  }
  CSPHandleState;
  CSPHandleState a;
  void
  fn1 ()
  {
      CSPHandleState b;
      b.fields = foo();
  }


$ g++ -O0 -c x.cpp 
x.cpp: In function 'void fn1()':
x.cpp:12:16: error: passing 'volatile foo' as 'this' argument of 'foo&
foo::operator=(const foo&)' discards qualifiers [-fpermissive]
       b.fields = foo();
                ^
g++: internal compiler error: Segmentation fault (program cc1plus)
0x40950c execute
    /home/dimhen/src/gcc-current/gcc/gcc.c:2822
0x409769 do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:4614
0x40c4d9 process_brace_body
    /home/dimhen/src/gcc-current/gcc/gcc.c:5871
0x40c4d9 handle_braces
    /home/dimhen/src/gcc-current/gcc/gcc.c:5785
0x40a1fa do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:5268
0x40c4d9 process_brace_body
    /home/dimhen/src/gcc-current/gcc/gcc.c:5871
0x40c4d9 handle_braces
    /home/dimhen/src/gcc-current/gcc/gcc.c:5785
0x40a1fa do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:5268
0x40a5eb do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:5373
0x40c4d9 process_brace_body
    /home/dimhen/src/gcc-current/gcc/gcc.c:5871
0x40c4d9 handle_braces
    /home/dimhen/src/gcc-current/gcc/gcc.c:5785
0x40a1fa do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:5268
0x40c4d9 process_brace_body
    /home/dimhen/src/gcc-current/gcc/gcc.c:5871
0x40c4d9 handle_braces
    /home/dimhen/src/gcc-current/gcc/gcc.c:5785
0x40a1fa do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:5268
0x40c4d9 process_brace_body
    /home/dimhen/src/gcc-current/gcc/gcc.c:5871
0x40c4d9 handle_braces
    /home/dimhen/src/gcc-current/gcc/gcc.c:5785
0x40a1fa do_spec_1
    /home/dimhen/src/gcc-current/gcc/gcc.c:5268
0x40c4d9 process_brace_body
    /home/dimhen/src/gcc-current/gcc/gcc.c:5871
0x40c4d9 handle_braces
    /home/dimhen/src/gcc-current/gcc/gcc.c:5785
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Thanks to David Blaikie for reduced testcase
(http://lists.cs.uiuc.edu/pipermail/cfe-users/2013-April/000085.html)