From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-430442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 6804 invoked by alias); 23 Sep 2013 22:03:24 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 6767 invoked by uid 48); 23 Sep 2013 22:03:18 -0000
From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58518] New: [4.8/4.9 regression] ICE template specialization
Date: Mon, 23 Sep 2013 22:03:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 4.9.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: reichelt at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter
Message-ID: <bug-58518-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2013-09/txt/msg01682.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58518

            Bug ID: 58518
           Summary: [4.8/4.9 regression] ICE template specialization
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          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 triggers an ICE since GCC 4.8.0:

========================================
template<typename T> struct A
{
  template<T, T> struct B {};
  template<T t> struct B<t, t> {};
};

A<int>::B<0, 0> b;
========================================

bug.cc:7:17: internal compiler error: in tsubst, at cp/pt.c:11473
 A<int>::B<0, 0> b;
                 ^
0x5a63d5 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc/gcc/cp/pt.c:11473
0x5a92a2 convert_template_argument
        ../../gcc/gcc/cp/pt.c:6424
0x5a3135 coerce_template_parms
        ../../gcc/gcc/cp/pt.c:6827
0x5bf864 get_class_bindings
        ../../gcc/gcc/cp/pt.c:18177
0x5c0420 most_specialized_class
        ../../gcc/gcc/cp/pt.c:18398
0x5d0eb0 instantiate_class_template_1
        ../../gcc/gcc/cp/pt.c:8687
0x5d0eb0 instantiate_class_template(tree_node*)
        ../../gcc/gcc/cp/pt.c:9216
0x65cdcb complete_type(tree_node*)
        ../../gcc/gcc/cp/typeck.c:132
0x54da66 start_decl_1(tree_node*, bool)
        ../../gcc/gcc/cp/decl.c:4670
0x577851 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
        ../../gcc/gcc/cp/decl.c:4633
0x649a5a cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16447
0x64a32f cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:10986
0x64c190 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:10867
0x6551ae cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:10764
0x653f0d cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10650
0x6557e6 cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:3939
0x6557e6 c_parse_file()
        ../../gcc/gcc/cp/parser.c:28893
0x768164 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1046
Please submit a full bug report, [etc.]

A little longer testcase triggers an ICE in a different function:

========================================
template<typename T> struct A
{
  typedef typename T::X U;

  template<U, U> struct B {};
  template<U u> struct B<u, u> {};
};

struct C
{
  typedef int X;
};

A<C>::B<0, 0> b;
========================================

bug.cc:14:15: internal compiler error: in dependent_type_p, at cp/pt.c:19969
 A<C>::B<0, 0> b;
               ^
0x588d28 dependent_type_p(tree_node*)
        ../../gcc/gcc/cp/pt.c:19969
0x589504 dependent_scope_p(tree_node*)
        ../../gcc/gcc/cp/pt.c:20000
0x54aed7 make_typename_type(tree_node*, tree_node*, tag_types, int)
        ../../gcc/gcc/cp/decl.c:3331
0x5a5781 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc/gcc/cp/pt.c:11914
0x5a92a2 convert_template_argument
        ../../gcc/gcc/cp/pt.c:6424
0x5a3135 coerce_template_parms
        ../../gcc/gcc/cp/pt.c:6827
0x5bf864 get_class_bindings
        ../../gcc/gcc/cp/pt.c:18177
0x5c0420 most_specialized_class
        ../../gcc/gcc/cp/pt.c:18398
0x5d0eb0 instantiate_class_template_1
        ../../gcc/gcc/cp/pt.c:8687
0x5d0eb0 instantiate_class_template(tree_node*)
        ../../gcc/gcc/cp/pt.c:9216
0x65cdcb complete_type(tree_node*)
        ../../gcc/gcc/cp/typeck.c:132
0x54da66 start_decl_1(tree_node*, bool)
        ../../gcc/gcc/cp/decl.c:4670
0x577851 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
        ../../gcc/gcc/cp/decl.c:4633
0x649a5a cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16447
0x64a32f cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:10986
0x64c190 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:10867
0x6551ae cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:10764
0x653f0d cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10650
0x6557e6 cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:3939
0x6557e6 c_parse_file()
        ../../gcc/gcc/cp/parser.c:28893
Please submit a full bug report, [etc.]