[Bug c++/60248] New: [4.7/4.8/4.9 Regression] ICE specializing variadic template

[Bug c++/60248] New: [4.7/4.8/4.9 Regression] ICE specializing variadic template

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

            Bug ID: 60248
           Summary: [4.7/4.8/4.9 Regression] ICE specializing variadic
                    template
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following valid code snippet (compiled with "-std=c++11 -g")
triggers an ICE since GCC 4.7.0:

====================================
template<int...> struct A {};

template<> struct A<0>
{
  typedef enum { e } B;
};

A<0> a;
====================================

bug.cc:3:19: internal compiler error: tree check: expected var_decl or
function_decl, have type_decl in make_alias_for, at cp/method.c:230
 template<> struct A<0>
                   ^
0xdbfcc4 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        ../../gcc/gcc/tree.c:9192
0x7118bf tree_check2
        ../../gcc/gcc/tree.h:2728
0x7118bf make_alias_for(tree_node*, tree_node*)
        ../../gcc/gcc/cp/method.c:230
0x776e40 mangle_decl(tree_node*)
        ../../gcc/gcc/cp/mangle.c:3510
0xdc1e20 decl_assembler_name(tree_node*)
        ../../gcc/gcc/tree.c:600
0x8e105e add_linkage_attr
        ../../gcc/gcc/dwarf2out.c:16558
0x905de9 gen_typedef_die
        ../../gcc/gcc/dwarf2out.c:19593
0x8f1654 gen_typedef_die
        ../../gcc/gcc/dwarf2out.c:19544
0x8f1654 gen_decl_die
        ../../gcc/gcc/dwarf2out.c:20403
0x8f454c gen_type_die_with_usage
        ../../gcc/gcc/dwarf2out.c:19736
0x8f127c gen_decl_die
        ../../gcc/gcc/dwarf2out.c:20400
0x8f340c gen_member_die
        ../../gcc/gcc/dwarf2out.c:19400
0x8f340c gen_struct_or_union_type_die
        ../../gcc/gcc/dwarf2out.c:19486
0x8f340c gen_tagged_type_die
        ../../gcc/gcc/dwarf2out.c:19676
0x8f4c30 gen_type_die_with_usage
        ../../gcc/gcc/dwarf2out.c:19823
0x8f127c gen_decl_die
        ../../gcc/gcc/dwarf2out.c:20400
0xafc8d2 rest_of_type_compilation(tree_node*, int)
        ../../gcc/gcc/passes.c:283
0x675d73 finish_struct_1(tree_node*)
        ../../gcc/gcc/cp/class.c:6636
0x677574 finish_struct(tree_node*, tree_node*)
        ../../gcc/gcc/cp/class.c:6801
0x6a97ba cp_parser_class_specifier_1
        ../../gcc/gcc/cp/parser.c:19218
Please submit a full bug report, [etc.]

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

Volker Reichelt <reichelt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.5.0, 4.6.0
   Target Milestone|---                         |4.7.4
            Summary|[4.7/4.8/4.9 Regression]    |[4.7/4.8/4.9 Regression]
                   |ICE specializing variadic   |[C++11] ICE specializing
                   |template                    |variadic template
      Known to fail|                            |4.7.0, 4.8.0, 4.9.0

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

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

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

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-02-18
                 CC|                            |jason at gcc dot gnu.org,
                   |                            |mpolacek at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r182970.

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

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

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

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Feb 21 14:56:38 2014
New Revision: 208000

URL: http://gcc.gnu.org/viewcvs?rev=208000&root=gcc&view=rev
Log:
    PR c++/60248
    * mangle.c (mangle_decl): Don't make an alias for a TYPE_DECL.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/variadic149.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/mangle.c

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Feb 21 15:01:54 2014
New Revision: 208005

URL: http://gcc.gnu.org/viewcvs?rev=208005&root=gcc&view=rev
Log:
    PR c++/60248
    * mangle.c (mangle_decl): Don't make an alias for a TYPE_DECL.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/variadic149.C
Modified:
    branches/gcc-4_7-branch/gcc/cp/ChangeLog
    branches/gcc-4_7-branch/gcc/cp/mangle.c

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Feb 21 15:29:14 2014
New Revision: 208006

URL: http://gcc.gnu.org/viewcvs?rev=208006&root=gcc&view=rev
Log:
    PR c++/60248
    * mangle.c (mangle_decl): Don't make an alias for a TYPE_DECL.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/g++.dg/cpp0x/variadic149.C
Modified:
    branches/gcc-4_8-branch/gcc/cp/ChangeLog
    branches/gcc-4_8-branch/gcc/cp/mangle.c

[Bug c++/60248] [4.7/4.8/4.9 Regression] [C++11] ICE specializing variadic template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60248

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

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

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 4.7.4/4.8.3/4.9.