CREATE TABLE ... ENGINE=SEQUENCE has confusing db_type

Thread 19 hit Breakpoint 1, mysql_create_table (thd=0x7ff77401b688, 

    create_table=0x7ff774030988, create_info=0x7ff75c5f8800, 

    alter_info=0x7ff75c5f8710)

    at /home/jan/work/mariadb/10.5/sql/sql_table.cc:5597

5597	  if (thd->lex->sql_command == SQLCOM_CREATE_TABLE &&

(rr) where

#0  mysql_create_table (thd=0x7ff77401b688, create_table=0x7ff774030988, 

    create_info=0x7ff75c5f8800, alter_info=0x7ff75c5f8710)

    at /home/jan/work/mariadb/10.5/sql/sql_table.cc:5597

#1  0x0000563db3472c32 in Sql_cmd_create_table_like::execute (

    this=0x7ff774030928, thd=0x7ff77401b688)

    at /home/jan/work/mariadb/10.5/sql/sql_table.cc:12397

#2  0x0000563db3359bef in mysql_execute_command (thd=0x7ff77401b688)

    at /home/jan/work/mariadb/10.5/sql/sql_parse.cc:6085

#3  0x0000563db33600f5 in mysql_parse (thd=0x7ff77401b688, 

    rawbuf=0x7ff774030850 "CREATE TABLE t0 (id GEOMETRY,parent_id GEOMETRY)ENGINE=SEQUENCE", length=63, parser_state=0x7ff75c5f92c0, is_com_multi=false, 

    is_next_command=false) at /home/jan/work/mariadb/10.5/sql/sql_parse.cc:8120

#4  0x0000563db335f768 in wsrep_mysql_parse (thd=0x7ff77401b688, 

    rawbuf=0x7ff774030850 "CREATE TABLE t0 (id GEOMETRY,parent_id GEOMETRY)ENGINE=SEQUENCE", length=63, parser_state=0x7ff75c5f92c0, is_com_multi=false, 

    is_next_command=false) at /home/jan/work/mariadb/10.5/sql/sql_parse.cc:7921

#5  0x0000563db334b242 in dispatch_command (command=COM_QUERY, 

    thd=0x7ff77401b688, 

    packet=0x7ff774027ea9 "CREATE TABLE t0 (id GEOMETRY,parent_id GEOMETRY)ENGINE=SEQUENCE", packet_length=63, is_com_multi=false, is_next_command=false)

    at /home/jan/work/mariadb/10.5/sql/sql_parse.cc:1877

#6  0x0000563db3349adf in do_command (thd=0x7ff77401b688)

    at /home/jan/work/mariadb/10.5/sql/sql_parse.cc:1375

--Type <RET> for more, q to quit, c to continue without paging--

#7  0x0000563db35136ed in do_handle_one_connection (connect=0x563db71da7c8, 

    put_in_cache=true) at /home/jan/work/mariadb/10.5/sql/sql_connect.cc:1416

#8  0x0000563db351345d in handle_one_connection (arg=0x563db71da7c8)

    at /home/jan/work/mariadb/10.5/sql/sql_connect.cc:1318

#9  0x0000563db3a6f1d0 in pfs_spawn_thread (arg=0x563db6a22678)

    at /home/jan/work/mariadb/10.5/storage/perfschema/pfs.cc:2201

#10 0x00007ff789497ada in start_thread (arg=<optimized out>)

    at ./nptl/pthread_create.c:444

#11 0x00007ff7895282e4 in clone ()

    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:100

(rr) next

5598	      create_info->used_fields & HA_CREATE_USED_ENGINE &&

(rr) 

5597	  if (thd->lex->sql_command == SQLCOM_CREATE_TABLE &&

(rr) 

5599	      create_info->db_type->db_type == DB_TYPE_SEQUENCE &&

(rr) p create_info->seq_create_info

$1 = (sequence_definition *) 0x0

(rr) p create_info->db_type

$2 = (handlerton *) 0x563db6af97b8

(rr) p *create_info->db_type

$3 = {db_type = 46, slot = 6, savepoint_offset = 8, close_connection = 0x0,