Use tcp_close to destroy the TCP listening socket. #148
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It's an error to call tcp_poll() on a pcb that has been converted to a listening socket via tcp_listen(), with such calls causing memory corruption. Call tcp_close to destroy the socket instead in ~TcpServer, and NULL out tcp to suppress the call to tcp_poll in the base class (via ~TcpConnection()->TcpConnection::close()->tcp_poll()).
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It's an error to call tcp_poll() on a pcb that has been converted to a
listening socket via tcp_listen(), with such calls causing memory corruption.
Call tcp_close to destroy the socket instead in ~TcpServer, and NULL out tcp
to suppress the call to tcp_poll in the base class
(via ~TcpConnection()->TcpConnection::close()->tcp_poll()).