Possible resource leak in `awaitable::operator=`

[ddvamp]

asio/include/boost/asio/awaitable.hpp

Lines 81 to 86 in 44722ea

	awaitable& operator=(awaitable&& other) noexcept
	{
	if (this != &other)
	frame_ = std::exchange(other.frame_, nullptr);
	return *this;
	}

In the implementation of awaitable::operator=, if there is an awaitable_frame, it is not destroyed before a new one is assigned. Therefore, resource leak is possible. Mini example on godbolt