ICE in make_init_entity_node lowering co_return co_await #180

//options_all:--c++20
#include <coroutine>

struct D { ~D(); };

struct awaiter {
  D d;
  bool await_ready() { return true; }
  void await_suspend(std::coroutine_handle<>) noexcept {}
  int await_resume() { return 0; }
};

struct promise {
  struct task get_return_object();
  std::suspend_never initial_suspend() { return {}; }
  struct final_awaitable : std::suspend_always { D d; };
  final_awaitable final_suspend() noexcept { return {}; }
  void return_value(int) {}
  void unhandled_exception() {}
};

struct task { using promise_type = promise; };

task f() {
  if (co_await awaiter{})
    co_return co_await awaiter{};
  co_return 0;
}