If connection closed by internal transport, callback not fired

[Bolderaysky]

Version: 0.8.3-dev
Transport: external asio
If some connection problems causes internal transport to close connection, callback set in .set_close_handler isn't fired. I can see asio printing out errors about connection loss, but websocketpp doesn't do anything about that. I wanted to use open and close events for corresponding to connection resource management, but i can't really do it while close not fired in case of transport errors.

Most of the time, in such cases I see this error

[2023-10-30 11:11:42] [error] handle_read_frame error: websocketpp.transport:7 (End of File)