mysql-test/main/assign_key_cache_debug.test

#
# MDEV-5405 RQG induced crash in mi_assign_to_key_cache in safe mutex unlock
#
--source include/have_debug_sync.inc
create table t1 (f int, key(f)) engine=myisam;
set global kc1.key_buffer_size = 65536;

connect (con1, localhost, root);

set debug_sync='assign_key_cache_op_unlock wait_for op_locked';
send cache index t1 in kc1;

connection default;
sleep 1;
set debug_sync='assign_key_cache_op_lock signal op_locked wait_for assigned';
send cache index t1 in kc1;

connection con1;
reap;
set debug_sync='now signal assigned';
disconnect con1;
connection default;
reap;

drop table t1;
set global kc1.key_buffer_size = 0;
set debug_sync='reset';