boost::asio crash when using a member acceptor instead of new one

Question

I am trying to put the acceptor, socket and endpoint as members into my class but ran into crashes. Must the socket be a shared_ptr like in this Question or why does it not work?

When I'm trying to setup a acceptor on a server like this:

tcp::endpoint ep(boost::asio::ip::address::from_string(localIpAddress), portNumber);
tcp::acceptor a(io_service);
tcp::socket s(io_service);
a.open(ep.protocol());
a.bind(ep);
a.listen(MAX_CONNECTIONS);
a.async_accept(s, boost::bind(&WifiConnector::onAccept, this, boost::asio::placeholders::error));

it runs without crashing during execution, but when I try to use a socket/acceptor/endpoint that are member of my WifiConnector class it crashes.

m_acceptor.open(localEndpoint.protocol()); // it crashes in this line already
m_acceptor.bind(localEndpoint);
m_acceptor.listen(MAX_CONNECTIONS);
m_acceptor.async_accept(socket, boost::bind(&WifiConnector::onAccept, this, boost::asio::placeholders::error));

declaration in WifiConnector.hpp:

private:
    tcp::socket m_socket;
    tcp::acceptor m_acceptor;
    tcp::endpoint m_localEndpoint;

initialization at class constructor:

WifiConnector::WifiConnector() :
    io_service(),
    m_socket(io_service),
    m_acceptor(io_service)
{
    m_localIpAddress    = "192.168.137.1";
    m_portNumber        = 30000;
    m_localEndpoint = tcp::endpoint(boost::asio::ip::address::from_string(m_localIpAddress), m_portNumber);
}

when it crashes, I get the following exeption:

boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error> >

Answer 1

private:
    tcp::socket m_socket;
    tcp::acceptor m_acceptor;
    tcp::endpoint m_localEndpoint;

This will not work. You are constructing using the default constructors, which is not what you want. For one thing you want to construct using the io_service used by everything else.

Make the attributes pointers, and construct them using new when you have the io_service.