--source include/galera_cluster.inc
--source include/have_innodb.inc

set @start_value = @@wsrep_slave_threads;

set @@global.wsrep_slave_threads=1;
set @@global.wsrep_slave_threads=4;
show warnings;
set @@global.wsrep_slave_threads=0;
show warnings;
set @@global.wsrep_slave_threads=-1;
show warnings;
--Error 1232
SET @@global.wsrep_slave_threads = r;

set @@global.wsrep_slave_threads = @start_value;