rpc: Add acceptors only when listening succeeded

src/rpcserver.cpp

@@ -642,7 +642,6 @@ void StartRPCThreads()
         LogPrintf("Binding RPC on address %s port %i (IPv4+IPv6 bind any: %i)\n", bindAddress.to_string(), endpoint.port(), bBindAny);
         boost::system::error_code v6_only_error;
         boost::shared_ptr<ip::tcp::acceptor> acceptor(new ip::tcp::acceptor(*rpc_io_service));
-        rpc_acceptors.push_back(acceptor);
 
         try {
             acceptor->open(endpoint.protocol());
@@ -658,6 +657,7 @@ void StartRPCThreads()
             RPCListen(acceptor, *rpc_ssl_context, fUseSSL);
 
             fListening = true;
+            rpc_acceptors.push_back(acceptor);
             // If dual IPv6/IPv4 bind succesful, skip binding to IPv4 separately
             if(bBindAny && bindAddress == asio::ip::address_v6::any() && !v6_only_error)
                 break;