[Bug c++/48522] New: decltype((object)) with templated classes crashes g++ 4.5.1.

[Bug c++/48522] New: decltype((object)) with templated classes crashes g++ 4.5.1.

[david at rgmadvisors dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48522

           Summary: decltype((object)) with templated classes crashes g++
                    4.5.1.
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: david@rgmadvisors.com


Created attachment 23933
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23933
Preprocessed broken_decltype.cpp

Hello All,

The following innocent-looking code crashes the compiler:

template <typename T>
struct Handle
{
    Handle(T& t);
};

template<class T>
struct Class {
    struct Struct {} data;
    void f();
    void g();
};

template<class T>
void Class<T>::f() {
    Handle< decltype((data)) > handle(data);
}

template<class T>
void Class<T>::g() {
    Handle< decltype((data)) > handle(data);
}

The command line and compiler output were:

g++ -std=g++0x broken_decltype.cpp (see attachment for detailed flags)

broken_decltype.cpp: In member function ‘void Class<T>::g()’:
broken_decltype.cpp:21:30: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate

This fails on multiple distributions including Linux 2.6.35.6-45.fc14.x86_64,
GNU C++ (GCC) version 4.5.1 20100924 (Red Hat 4.5.1-4) (x86_64-redhat-linux)
compiled by GNU C version 4.5.1 20100924 (Red Hat 4.5.1-4), GMP version 4.3.1,
MPFR version 2.4.2, MPC version 0.8.1

Cheers!

David.

[Bug c++/48522] decltype((object)) with templated classes crashes g++ 4.5.1.

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48522

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
      Known to work|                            |4.6.0
           Severity|major                       |normal

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-04-08 22:27:28 UTC ---
seems to be fixed in 4.6

[Bug c++/48522] [C++0x] decltype((object)) with templated classes crashes g++ 4.5.1.

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48522

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.05.09 23:22:32
      Known to work|                            |4.7.0
         AssignedTo|unassigned at gcc dot       |paolo.carlini at oracle dot
                   |gnu.org                     |com
     Ever Confirmed|0                           |1

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-05-09 23:22:32 UTC ---
Indeed. I'm going to add the testcase to mainline and 4_6-branch and close the
PR.

[Bug c++/48522] [C++0x] decltype((object)) with templated classes crashes g++ 4.5.1.

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48522

--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2011-05-09 23:24:23 UTC ---
Author: paolo
Date: Mon May  9 23:24:21 2011
New Revision: 173599

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173599
Log:
2011-05-09  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/48522
    * g++.dg/cpp0x/pr48522.C: New.


Added:
    branches/gcc-4_6-branch/gcc/testsuite/g++.dg/cpp0x/pr48522.C
Modified:
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog

[Bug c++/48522] [C++0x] decltype((object)) with templated classes crashes g++ 4.5.1.

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48522

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.6.0

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-05-09 23:27:23 UTC ---
Done.

[Bug c++/48522] [C++0x] decltype((object)) with templated classes crashes g++ 4.5.1.

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48522

--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2011-05-09 23:24:04 UTC ---
Author: paolo
Date: Mon May  9 23:24:01 2011
New Revision: 173598

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173598
Log:
2011-05-09  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/48522
    * g++.dg/cpp0x/pr48522.C: New.


Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/pr48522.C
Modified:
    trunk/gcc/testsuite/ChangeLog