[Bug c++/95510] New: [coroutines] ICE with consteval operator co_await

[bruck.michael at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95510

            Bug ID: 95510
           Summary: [coroutines] ICE with consteval operator co_await
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bruck.michael at gmail dot com
  Target Milestone: ---

https://gcc.godbolt.org/z/JAaXAA

#include <coroutine>

struct dummy
{
    struct promise_type
    {
        std::suspend_always initial_suspend() const noexcept { return {}; }
        std::suspend_never final_suspend() const noexcept { return {}; }
        dummy get_return_object() const noexcept { return {}; }
        void return_void() const noexcept {}
        void unhandled_exception() const noexcept {}
    };
};

struct awaitable {};

consteval auto operator co_await(awaitable) noexcept
{
    return std::suspend_always{};
}

dummy foo()
{ 
    co_await awaitable{};
}

int main() {}

---
source>: In function 'dummy foo()':
<source>:24:24: internal compiler error: in extract_call_expr, at
cp/call.c:6634
   24 |     co_await awaitable{};
      |                        ^