[Bug c++/54744] New: internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[Bug c++/54744] New: internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[ai.azuma at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

             Bug #: 54744
           Summary: internal compiler error: Segmentation fault, by
                    dependent base, member typedef and ctor-initializer
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ai.azuma@gmail.com


Created attachment 28298
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28298
Output of -v option and preprocessed file

The following valid code causes segfault with GCC 4.8.0 20120916 and GCC 4.7.3
20120922.

///////////////////////////////////////////////////////////
template <typename T>
struct base {
  typedef base base_type;
};

template <typename T>
struct derived : base<T> {
  typedef typename derived::base_type::base_type base_type;
  derived() : base_type() {}
};
///////////////////////////////////////////////////////////

Note that the above code compiles successfully with GCC 4.6.4 20120921.

[Bug c++/54744] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl at gcc dot gnu.org

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-09-29 11:05:15 UTC ---
H.J. can you help finding which change broke this?

[Bug c++/54744] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-09-29 12:58:44 UTC ---
http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182012

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-09-29
            Summary|internal compiler error:    |[4.7/4.8 Regression]
                   |Segmentation fault, by      |internal compiler error:
                   |dependent base, member      |Segmentation fault, by
                   |typedef and                 |dependent base, member
                   |ctor-initializer            |typedef and
                   |                            |ctor-initializer
     Ever Confirmed|0                           |1

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-09-29 18:25:21 UTC ---
Thanks Jakub. Looks like this is a regression.

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.3

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-29 11:38:42 UTC ---
Infinite recursion in resolve_typename_type, between the two recursive calls
inside it.

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |jason at gcc dot gnu.org
         AssignedTo|unassigned at gcc dot       |jason at gcc dot gnu.org
                   |gnu.org                     |

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2012-12-06 20:21:21 UTC ---
Author: jason
Date: Thu Dec  6 20:21:08 2012
New Revision: 194267

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194267
Log:
    PR c++/54744
    * pt.c (resolve_typename_type): Check TYPENAME_IS_RESOLVING_P on scope.
    * init.c (expand_member_init): Check for being in a template first.
    * parser.c (cp_parser_mem_initializer_list): Only check class types
    for equivalence to the current class.

Added:
    trunk/gcc/testsuite/g++.dg/template/meminit3.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/init.c
    trunk/gcc/cp/parser.c
    trunk/gcc/cp/pt.c

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> 2012-12-06 20:21:58 UTC ---
Author: jason
Date: Thu Dec  6 20:21:44 2012
New Revision: 194269

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194269
Log:
    PR c++/54744
    * pt.c (resolve_typename_type): Check TYPENAME_IS_RESOLVING_P on scope.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/g++.dg/template/meminit3.C
Modified:
    branches/gcc-4_7-branch/gcc/cp/ChangeLog
    branches/gcc-4_7-branch/gcc/cp/pt.c

[Bug c++/54744] [4.7/4.8 Regression] internal compiler error: Segmentation fault, by dependent base, member typedef and ctor-initializer

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54744

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> 2012-12-06 20:22:44 UTC ---
Fixed for 4.7.3.