[Bug c++/46129] New: ICE: in tsubst_copy, at cp/pt.c:11375

[Bug c++/46129] New: ICE: in tsubst_copy, at cp/pt.c:11375

[marc.glisse at normalesup dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46129

           Summary: ICE: in tsubst_copy, at cp/pt.c:11375
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: marc.glisse@normalesup.org


The following code recently (sometime in October) started failing to compile
with:

Sqrt_extension.cpp: In member function ‘void
Scalar_factor_traits<T>::Scalar_factor::operator()(const Gmpz&) [with T =
int]’:
Sqrt_extension.cpp:15:7: internal compiler error: in tsubst_copy, at
cp/pt.c:11375
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


class Gmpz { };

template <class T>
struct Scalar_factor_traits {
    struct Scalar_factor
    {
        void operator () (const Gmpz& d_ = Gmpz() ) { }
    };
};

void scalar_factor_traits_test(){
    {
        typedef Scalar_factor_traits<int> SFT;
        SFT::Scalar_factor sfac;
        sfac();
    }
}

[Bug c++/46129] [4.6 Regression] ICE: in tsubst_copy, at cp/pt.c:11375

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46129

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.10.22 10:16:00
                 CC|                            |hjl.tools at gmail dot com
            Summary|ICE: in tsubst_copy, at     |[4.6 Regression] ICE: in
                   |cp/pt.c:11375               |tsubst_copy, at
                   |                            |cp/pt.c:11375
     Ever Confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2010-10-22 10:16:00 UTC ---
HJ, can you do a binary search on this?

[Bug c++/46129] [4.6 Regression] ICE: in tsubst_copy, at cp/pt.c:11375

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46129

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at redhat dot com

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-22 13:47:54 UTC ---
It is caused by revision 165307:

http://gcc.gnu.org/ml/gcc-cvs/2010-10/msg00490.html

[Bug c++/46129] [4.6 Regression] ICE: in tsubst_copy, at cp/pt.c:11375

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46129

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2010-10-22 18:37:58 UTC ---
Author: jason
Date: Fri Oct 22 18:37:53 2010
New Revision: 165850

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165850
Log:
    PR c++/46129
    * pt.c (instantiate_class_template): Don't instantiate default
    arguments.

Added:
    trunk/gcc/testsuite/g++.dg/template/defarg14.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/46129] [4.6 Regression] ICE: in tsubst_copy, at cp/pt.c:11375

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46129

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jason at gcc dot gnu.org
         Resolution|                            |FIXED

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2010-10-22 18:48:02 UTC ---
Fixed.