#3  <signal handler called>

#4  0x00007f4c6bdb6428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54

#5  0x00007f4c6bdb802a in __GI_abort () at abort.c:89

#6  0x00007f4c6bdaebd7 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x55f4a2f009d8 "!tmp_gco->next_gco || tmp_gco->last_sub_id > sub_id", file=file@entry=0x55f4a2f008d8 "/10.4/sql/rpl_parallel.cc", line=line@entry=228, function=function@entry=0x55f4a2f014e0 <finish_event_group(rpl_parallel_thread*, unsigned long long, rpl_parallel_entry*, rpl_group_info*)::__PRETTY_FUNCTION__> "void finish_event_group(rpl_parallel_thread*, uint64, rpl_parallel_entry*, rpl_group_info*)") at assert.c:92

#7  0x00007f4c6bdaec82 in __GI___assert_fail (assertion=0x55f4a2f009d8 "!tmp_gco->next_gco || tmp_gco->last_sub_id > sub_id", file=0x55f4a2f008d8 "/10.4/sql/rpl_parallel.cc", line=228, function=0x55f4a2f014e0 <finish_event_group(rpl_parallel_thread*, unsigned long long, rpl_parallel_entry*, rpl_group_info*)::__PRETTY_FUNCTION__> "void finish_event_group(rpl_parallel_thread*, uint64, rpl_parallel_entry*, rpl_group_info*)") at assert.c:101

#8  0x000055f4a2399aa1 in finish_event_group (rpt=0x7f4bf80098d8, sub_id=26, entry=0x7f4bf801cbe0, rgi=0x7f4bf8035500) at /10.4/sql/rpl_parallel.cc:228

#9  0x000055f4a239cbf7 in handle_rpl_parallel_thread (arg=0x7f4bf80098d8) at /10.4/sql/rpl_parallel.cc:1379

#10 0x00007f4c6d2a56ba in start_thread (arg=0x7f4c555f8700) at pthread_create.c:333

#11 0x00007f4c6be8841d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

query_init:

	CREATE TABLE t (i1 int, i2 int, pk int) ;  

query:

	a | b;

a:

CREATE TABLE t3 LIKE t ; ALTER TABLE t3 ENGINE = MERGE UNION (t1,t2);  COMMIT ;

b:

DELETE FROM mysql.tables_priv WHERE user = 'aaa' ; FLUSH PRIVILEGES ;

 perl ./runall-new.pl  --no-mask --seed=time --duration=300 --queries=100M  --mysqld=--log_bin=mysql-bin  --mysqld=--slave_parallel_mode=\"optimistic\"  --rpl_mode=mixed --grammar=conf/mariadb/1.yy --skip-gendata --threads=1 --mysqld=--slave_parallel_threads=3 --vardir= --basedir=/git/10.4