Assertion `!table->pos_in_locked_tables' failed in tc_release_table on flushing RocksDB table under SERIALIZABLE

--source include/have_binlog_format_row.inc

CREATE TABLE t1 (pk INT PRIMARY KEY) ENGINE=RocksDB;

LOCK TABLE t1 WRITE;

SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;

FLUSH TABLES;

# Cleanup

DROP TABLE t1;

mysqld: /data/src/10.2/sql/table_cache.cc:453: void tc_release_table(TABLE*): Assertion `!table->pos_in_locked_tables' failed.

181114 16:40:23 [ERROR] mysqld got signal 6 ;

#7  0x00007fd683225ee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x000055a483962206 in tc_release_table (table=0x7fd64c081a40) at /data/src/10.2/sql/table_cache.cc:453

#9  0x000055a4836fbe82 in close_thread_table (thd=0x7fd64c000b00, table_ptr=0x7fd64c000be0) at /data/src/10.2/sql/sql_base.cc:903

#10 0x000055a4836fe8ff in Locked_tables_list::unlink_all_closed_tables (this=0x7fd64c004550, thd=0x7fd64c000b00, lock=0x0, reopen_count=0) at /data/src/10.2/sql/sql_base.cc:2367

#11 0x000055a4836feccc in Locked_tables_list::reopen_tables (this=0x7fd64c004550, thd=0x7fd64c000b00, need_reopen=false) at /data/src/10.2/sql/sql_base.cc:2464

#12 0x000055a4836fb0e2 in close_cached_tables (thd=0x7fd64c000b00, tables=0x0, wait_for_refresh=true, timeout=86400) at /data/src/10.2/sql/sql_base.cc:485

#13 0x000055a4838f340f in reload_acl_and_cache (thd=0x7fd64c000b00, options=4, tables=0x0, write_to_binlog=0x7fd66cf3e910) at /data/src/10.2/sql/sql_reload.cc:344

#14 0x000055a483776d25 in mysql_execute_command (thd=0x7fd64c000b00) at /data/src/10.2/sql/sql_parse.cc:5401

#15 0x000055a48377e865 in mysql_parse (thd=0x7fd64c000b00, rawbuf=0x7fd64c012548 "FLUSH TABLES", length=12, parser_state=0x7fd66cf3f200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:8012

#16 0x000055a48376c1af in dispatch_command (command=COM_QUERY, thd=0x7fd64c000b00, packet=0x7fd64c18bd11 "FLUSH TABLES", packet_length=12, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1824

#17 0x000055a48376ab12 in do_command (thd=0x7fd64c000b00) at /data/src/10.2/sql/sql_parse.cc:1378

#18 0x000055a4838bd06d in do_handle_one_connection (connect=0x55a485e05b20) at /data/src/10.2/sql/sql_connect.cc:1335

#19 0x000055a4838bcdfa in handle_one_connection (arg=0x55a485e05b20) at /data/src/10.2/sql/sql_connect.cc:1241

#20 0x000055a483ce045c in pfs_spawn_thread (arg=0x55a485d51d20) at /data/src/10.2/storage/perfschema/pfs.cc:1862

#21 0x00007fd684ce1494 in start_thread (arg=0x7fd66cf40700) at pthread_create.c:333

#22 0x00007fd6832e293f in clone () from /lib/x86_64-linux-gnu/libc.so.6

query 'FLUSH TABLES' failed: 4057: MyRocks supports only READ COMMITTED and REPEATABLE READ isolation levels. Please change from current isolation level SERIALIZABLE