MySQL Bugs: #99131: Segfault on shutdown if started with --create-admin-listener-thread=1 option

DRANK

Description: Server crashes with segmentation fault on shutdown if started with -- create-admin-listener-thread=1 option and without --admin-address option How to repeat: Start server with -- create-admin-listener-thread=1 option and without --admin-address option using mysql command line client execute SHUTDOWN Suggested fix: Improve logic/protection in Mysqld_socket_listener::close_listener() to detect if setup of admin_socket_thread_id.thread took place in Mysqld_socket_listener::setup_listener()