[Bug c++/108613] New: GCC12 internal compiler error on __int128_t in type_traits header

["mserdarsanli at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108613

            Bug ID: 108613
           Summary: GCC12 internal compiler error on __int128_t in
                    type_traits header
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mserdarsanli at gmail dot com
  Target Milestone: ---

https://godbolt.org/z/M1o34e6cx

Below code crashes GCC versions starting with GCC 12. It is only stuff from std
library headers, I've copied bits from preprocessed output.



template< class > struct remove_cv;
template< class _Tp> using __remove_cv_t = typename remove_cv< _Tp> ::type;

template< class _Tp, _Tp __v>
struct integral_constant {
    static constexpr inline _Tp value = (__v);
    typedef _Tp value_type;
    typedef integral_constant type;
    constexpr operator value_type() const noexcept { return value; }
    constexpr value_type operator()() const noexcept { return value; }
};

using false_type = integral_constant< bool, false> ;

template< class ...> struct __or_;

template<> struct __or_< > : public false_type {};


template< class , class > struct is_same;

template< class _Tp, class ..._Types> using __is_one_of = __or_< is_same< _Tp,
_Types> ...> ;

template< class _Tp> using __is_signed_integer = __is_one_of< _Tp , 
    signed char, signed short, signed int, signed long, signed long long,
signed __int128_t> ;


-----------
Stacktrace:

0xe2534f crash_signal
        /root/source/gcc-12.2.0/gcc/toplev.cc:322
0x7c0535 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
        /root/source/gcc-12.2.0/gcc/cp/decl.cc:12373
0x7c73fc groktypename(cp_decl_specifier_seq*, cp_declarator const*, bool)
        /root/source/gcc-12.2.0/gcc/cp/decl.cc:5514
0x8797d5 cp_parser_type_id_1
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:24250
0x87c4f3 cp_parser_template_type_arg
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:24272
0x87c659 cp_parser_template_argument
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:18803
0x87c659 cp_parser_template_argument_list
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:18727
0x87c659 cp_parser_enclosed_template_argument_list
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:32059
0x87da7f cp_parser_template_id
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:18266
0x87e239 cp_parser_class_name
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:25713
0x875d8e cp_parser_qualifying_entity
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:7116
0x875d8e cp_parser_nested_name_specifier_opt
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:6798
0x88cf6c cp_parser_simple_type_specifier
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:19765
0x86aea5 cp_parser_type_specifier
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:19424
0x87b3d0 cp_parser_type_specifier_seq
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:24364
0x879744 cp_parser_type_id_1
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:24164
0x87c117 cp_parser_type_id
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:24260
0x87c117 cp_parser_alias_declaration
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:21778
0x897f37 cp_parser_template_declaration_after_parameters
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:31316
0x89827a cp_parser_explicit_template_declaration
        /root/source/gcc-12.2.0/gcc/cp/parser.cc:31598