[Bug c++/105475] New: ICE in coerce_template_parms, at cp/pt.cc:9183

[Bug c++/105475] New: ICE in coerce_template_parms, at cp/pt.cc:9183

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105475

            Bug ID: 105475
           Summary: ICE in coerce_template_parms, at cp/pt.cc:9183
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: C++-Coroutine, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

g++ 13.0.0 20220501 snapshot (g:75bbc3da3e5f75f683fa33e309045c582efd20eb) ICEs
when compiling test/CodeGenCoroutines/coro-newpm-pipeline.cpp or
test/CodeGenCoroutines/coro-always-inline.cpp w/ -fcoroutines:

namespace std {

struct handle {};

struct awaitable {
  bool await_ready() noexcept { return false; }
  void await_suspend(handle) noexcept {}
  bool await_resume() noexcept { return true; }
};

template <typename T> struct coroutine_handle {
  static handle from_address(void *address) noexcept { return {}; }
};

template <typename T = void> struct coroutine_traits {
  struct promise_type {
    awaitable initial_suspend() { return {}; }
    awaitable final_suspend() noexcept { return {}; }
    void return_void() {}
    T get_return_object() { return T(); }
    void unhandled_exception() {}
  };
};
} // namespace std

void foo() { co_return; }

% g++-13.0.0 -fcoroutines -c test/CodeGenCoroutines/coro-newpm-pipeline.cpp
test/CodeGenCoroutines/coro-newpm-pipeline.cpp: In function 'void foo()':
test/CodeGenCoroutines/coro-newpm-pipeline.cpp:43:14: internal compiler error:
in coerce_template_parms, at cp/pt.cc:9183
   43 | void foo() { co_return; }
      |              ^~~~~~~~~
0x706e6c coerce_template_parms
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/pt.cc:9183
0xb532b5 lookup_template_class_1
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/pt.cc:9966
0xb55150 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/pt.cc:10353
0x9adfce instantiate_coro_handle_for_promise_type
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/coroutines.cc:400
0x9b099e coro_promise_type_found_p
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/coroutines.cc:455
0x9b277b finish_co_return_stmt(unsigned int, tree_node*)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/coroutines.cc:1331
0xadbc28 cp_parser_jump_statement
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:14303
0xadbc28 cp_parser_statement
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:12312
0xadbd7d cp_parser_statement_seq_opt
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:12850
0xadbe57 cp_parser_compound_statement
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:12802
0xafca45 cp_parser_function_body
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:25076
0xafca45 cp_parser_ctor_initializer_opt_and_function_body
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:25127
0xafd9fa cp_parser_function_definition_after_declarator
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:31259
0xafecb8 cp_parser_function_definition_from_specifiers_and_declarator
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:31175
0xafecb8 cp_parser_init_declarator
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:22598
0xad87f9 cp_parser_simple_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:15280
0xb09f85 cp_parser_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:14966
0xb0a969 cp_parser_toplevel_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:14987
0xb0a969 cp_parser_translation_unit
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:5010
0xb0a969 c_parse_file()
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/cp/parser.cc:48113

[Bug c++/105475] ICE in coerce_template_parms, at cp/pt.cc:9183

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105475

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |iains at gcc dot gnu.org,
                   |                            |marxin at gcc dot gnu.org
   Last reconfirmed|                            |2022-05-04

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It's there since the beginning of coroutines (r10-6063-g49789fd08378e3ff).