[Bug c++/49387] New: t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[Bug c++/49387] New: t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[mathieu.malaterre at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

           Summary: t.cxx:140: error: too many initializers for ‘const
                    __class_type_info_pseudo’
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mathieu.malaterre@gmail.com


I am getting this weird compilation error which I am not able to understand
what it means:


$ g++ t.cxx
t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

See attached cxx file.

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2011.06.13 09:07:08
     Ever Confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-06-13 09:07:08 UTC ---
the attachment is missing

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[mathieu.malaterre at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #2 from Mathieu Malaterre <mathieu.malaterre at gmail dot com> 2011-06-13 09:09:15 UTC ---
Created attachment 24505
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24505
Test case

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-06-13 09:45:51 UTC ---
I can confirm this ... it's a strange one

but in future please provide the information requested:
http://gcc.gnu.org/bugs/
You haven't even said what version of the compiler you're using

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[mathieu.malaterre at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #4 from Mathieu Malaterre <mathieu.malaterre at gmail dot com> 2011-06-13 09:49:41 UTC ---
Test was done a on a debian/squeeze system:

$ g++ --version
g++ (Debian 4.4.5-8) 4.4.5


$ apt-cache policy libboost1.42-dev
libboost1.42-dev:
  Installed: 1.42.0-4
  Candidate: 1.42.0-4
  Version table:
     1.42.0-4+b1 0
        200 http://ftp.fr.debian.org/debian/ testing/main amd64 Packages
        100 http://ftp.fr.debian.org/debian/ unstable/main amd64 Packages
 *** 1.42.0-4 0
        500 http://ftp.fr.debian.org/debian/ squeeze/main amd64 Packages
        100 /var/lib/dpkg/status

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-06-13 11:53:52 UTC ---
Created attachment 24508
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24508
reduced testcase

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-06-13 12:39:59 UTC ---
further reduced


#include <typeinfo>

struct ResourceMonitorClient { };

template <typename T> struct ResourcePool : public ResourceMonitorClient {
  virtual ~ResourcePool() { }
};

template <typename T> struct BaseWriter {

  BaseWriter() { 
    typeid(ResourcePool<int>*);
  }

  virtual void run() {
    ResourcePool<int> pool;
  }

};

BaseWriter<void> b;

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

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++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> 2011-07-01 00:53:14 UTC ---
Author: jason
Date: Fri Jul  1 00:53:10 2011
New Revision: 175743

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=175743
Log:
    PR c++/49387
    * rtti.c (get_pseudo_ti_index): Call complete_type.

Added:
    trunk/gcc/testsuite/g++.dg/rtti/template1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/rtti.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.7.0

--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> 2011-07-01 00:53:43 UTC ---
Fixed for 4.7.

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:97b30a399ef561f6f37a2c08c830fdf3141bb504

commit r13-24-g97b30a399ef561f6f37a2c08c830fdf3141bb504
Author: Jason Merrill <jason@redhat.com>
Date:   Fri Apr 15 00:11:00 2022 -0400

    c++: typeid and instantiation [PR102651]

    PR49387 was a problem with initially asking for a typeid for a class
    template specialization before it was complete, and later actually filling
    in the descriptor when the class was complete, and thus disagreeing on the
    form of the descriptor.  I fixed that by forcing the class to be complete,
    but this testcase shows why that approach is problematic.  So instead let's
    adjust the type of the descriptor later if needed.

            PR c++/102651
            PR c++/49387

    gcc/cp/ChangeLog:

            * rtti.cc (get_tinfo_decl_direct): Don't complete_type.
            (emit_tinfo_decl): Update tdesc type if needed.

    gcc/testsuite/ChangeLog:

            * g++.dg/rtti/typeid-complete1.C: New test.

[Bug c++/49387] t.cxx:140: error: too many initializers for ‘const __class_type_info_pseudo’

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49387

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:5237059e04d105fe5441fa7434699eea9a34bf1b

commit r12-8378-g5237059e04d105fe5441fa7434699eea9a34bf1b
Author: Jason Merrill <jason@redhat.com>
Date:   Fri Apr 15 00:11:00 2022 -0400

    c++: typeid and instantiation [PR102651]

    PR49387 was a problem with initially asking for a typeid for a class
    template specialization before it was complete, and later actually filling
    in the descriptor when the class was complete, and thus disagreeing on the
    form of the descriptor.  I fixed that by forcing the class to be complete,
    but this testcase shows why that approach is problematic.  So instead let's
    adjust the type of the descriptor later if needed.

            PR c++/102651
            PR c++/49387

    gcc/cp/ChangeLog:

            * rtti.cc (get_tinfo_decl_direct): Don't complete_type.
            (emit_tinfo_decl): Update tdesc type if needed.

    gcc/testsuite/ChangeLog:

            * g++.dg/rtti/typeid-complete1.C: New test.