Deadlock between mysql_change_user(), SHOW VARIABLES and INSTALL PLUGIN

delimiter |;

CREATE PROCEDURE p_install(x INT)

BEGIN

  DECLARE CONTINUE HANDLER FOR 1126 BEGIN END;

  WHILE x DO

    SET x= x - 1;

    INSTALL PLUGIN no_such_plugin SONAME 'no_such_object';

  END WHILE;

END|

CREATE PROCEDURE p_show_vars(x INT)

WHILE x DO

  SET x= x - 1;

  SHOW VARIABLES;

END WHILE|

delimiter ;|

connect(con1, localhost, root,,);

connect(con2, localhost, root,,);

connection con1;

--send CALL p_install(100);

connection con2;

--send CALL p_show_vars(100);

connection default;

disable_result_log;

let $i= 100;

while ($i)

{

  change_user;

  dec $i;

}

connection con1;

reap;

connection con2;

reap;

connection default;

enable_result_log;

disconnect con1;

disconnect con2;

DROP PROCEDURE p_install;

DROP PROCEDURE p_show_vars;