SET GLOBAL innodb_undo_log_truncate = 1;
SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
create table t1(keyc int primary key, c char(100)) engine = innodb;
begin;
commit;
begin;
update t1 set c = 'MariaDB';
update t1 set c = 'InnoDB';
set global debug_dbug = '+d,ib_undo_trunc';
commit;
drop table t1;
call mtr.add_suppression("InnoDB: innodb_undo_tablespaces=0 disables dedicated undo log tablespaces");
SET GLOBAL innodb_fast_shutdown=0;
FOUND 1 /ib_undo_trunc/ in mysqld.1.err
# restart: with restart_parameters