Windows : application verifier stop "Attempt to use an unknown SOCKET" in debug build.

In debug code (DBUG_EXECUTE_IF), and hopefully only there, sometimes the socket is being closed from inside the server and set to INVALID_SOCKET

Verified does not like it, and stops with

=======================================
VERIFIER STOP 0000E102: pid 0x1080: Attempt to use an unknown SOCKET

FFFFFFFF : SOCKET being accessed

at this place e.g in connect_debug test

mysqld!inline_mysql_socket_send
mysqld!vio_write
mysqld!net_real_write
mysqld!net_flush
mysqld!net_write_command
mysqld!net_send_error_packet
mysqld!Protocol::send_error
mysqld!Protocol::end_statement
mysqld!login_connection
mysqld!thd_prepare_connection