1create table t1 (a int, b int);
2create table t2 (c int, d int);
3insert t1 values (1,2),(3,4);
4insert t2 values (5,6),(7,8);
5create table t0 (x int);
6insert t0 values (11), (22);
7create trigger tr1 before update on t1 for each row insert t0 values (new.b);
8set debug_sync='open_tables_after_open_and_process_table SIGNAL ready WAIT_FOR cont';
9update t1 join t2 on (a=c+4) set b=d;
10connect con1, localhost, root;
11set debug_sync='now WAIT_FOR ready';
12set debug_sync='mdl_acquire_lock_wait SIGNAL cont';
13lock table t1 write, t0 write;
14disconnect con1;
15connection default;
16drop table t1, t2, t0;
17set debug_sync='reset';
18