[Bug c++/31993] New: [4.3 regression] ICE with template class in variadic template class

[Bug c++/31993] New: [4.3 regression] ICE with template class in variadic template class

[reichelt at gcc dot gnu dot org]

The following valid code snippet with variadic templates triggers an ICE
on mainline:

=============================================
template<typename...> struct A;

template<template<int> class... T> struct A<T<0>...>
{
  template<int> struct B {};
  B<0> b;
};
=============================================

bug.cc:6: internal compiler error: tree check: expected tree that contains
'decl non-common' structure, have 'template_template_parm' in
convert_template_argument, at cp/pt.c:4665
Please submit a full bug report, [etc.]


-- 
           Summary: [4.3 regression] ICE with template class in variadic
                    template class
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[reichelt at gcc dot gnu dot org]

-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dgregor at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2007-05-22 23:18 -------
Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-05-22 23:18:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[dgregor at gcc dot gnu dot org]

-- 

dgregor at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |dgregor at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2007-05-22 23:18:30         |2007-07-03 18:06:01
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[janis at gcc dot gnu dot org]

------- Comment #2 from janis at gcc dot gnu dot org  2007-10-19 20:07 -------
This isn't a regression.  The error is reported with a compiler from 20070210,
the day after support for variadic templates was added.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[dgregor at gcc dot gnu dot org]

------- Comment #3 from dgregor at gcc dot gnu dot org  2007-10-30 13:37 -------
Subject: Bug 31993

Author: dgregor
Date: Tue Oct 30 13:36:34 2007
New Revision: 129773

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129773
Log:
2007-10-30  Douglas Gregor  <doug.gregor@gmail.com>

        PR c++/31993
        PR c++/32252
        * pt.c (find_parameter_packs_r): Fix typo in comment.
        (convert_template_argument): Look at the pattern of a pack
        expansion to determine what kind of entity we're converting.
        (coerce_template_parameter_pack): When we have coerced a non-type
        template parameter pack, substitute into the type of that pack.
        (tsubst_pack_expansion): When our substitution of a parameter pack
        is a "trivial" substitution of itself, just substitute into the
        pack expansion rather than actually expanding.

2007-10-30  Douglas Gregor  <doug.gregor@gmail.com>

        PR c++/31993
        PR c++/32252
        * g++.dg/cpp0x/pr31993.C: New
        * g++.dg/cpp0x/pr32252.C: New

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/pr31993.C
    trunk/gcc/testsuite/g++.dg/cpp0x/pr32252.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/parse/crash36.C


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993

[Bug c++/31993] [4.3 regression] ICE with template class in variadic template class

[dgregor at gcc dot gnu dot org]

------- Comment #4 from dgregor at gcc dot gnu dot org  2007-10-30 13:45 -------
Fixed.


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dgregor at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31993