https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94288
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
namespace std {
template <typename _Result> struct coroutine_traits {
using promise_type = _Result::promise_type;
};
template <typename = void> struct coroutine_handle;
template <> struct coroutine_handle<> {};
template <typename> struct coroutine_handle : coroutine_handle<> {};
struct A {
void await_ready();
void await_suspend(coroutine_handle<>);
void await_resume();
};
} // namespace std
struct B {
struct C {
void await_ready();
template <typename Promise>
void await_suspend(std::coroutine_handle<Promise>);
void await_resume();
};
std::coroutine_handle<> __trans_tmp_1;
auto get_return_object() { return __trans_tmp_1; }
auto initial_suspend() { return std::A(); }
auto final_suspend() { return C(); }
void unhandled_exception();
};
struct D {
using promise_type = B;
std::coroutine_handle<> _handle;
void await_ready();
void await_suspend(std::coroutine_handle<>);
void await_resume();
};
D foo() { co_await foo(); }
