message: coroutine_owner: atomic loads & stores are not constexpr
diff: @@ -98,11 +98,11 @@ namespace ranges
  explicit constexpr coroutine_owner(base_t coro) noexcept
  : base_t(coro)
  {}
  - constexpr /*c++14*/ coroutine_owner(coroutine_owner &&that) noexcept
  + coroutine_owner(coroutine_owner &&that) noexcept
  : base_t(ranges::exchange(that.base(), {}))
  , copied_(that.copied_.load(std::memory_order_relaxed))
  {}
  - constexpr /*c++14*/ coroutine_owner(coroutine_owner const &that) noexcept
  + coroutine_owner(coroutine_owner const &that) noexcept
  : base_t(that.handle())
  , copied_(that.handle() != nullptr)
  {
  