TcpTransport should store serverAddress as value (not reference)

See TcpTransport.serverAddress definition:

const InetSocketAddress &serverAddress;

When the TcpTransport is initialized, a reference to value on stack gets there. Then, the original InetAddress is deallocated and overridden with rubbish.
Anything could happen then... In my case the TcpTransport was not properly returned to ConnectionPool because the server address was overridden.