Server crash in print_keydup_error / key_unpack or unexpected ER_DUP_KEY

INSTALL SONAME 'ha_rocksdb';

CREATE TABLE t1 (a INT, KEY(a)) ENGINE=RocksDB;

INSERT INTO t1 VALUES (1),(2);

CREATE TABLE t2 (b INT) ENGINE=RocksDB;

CREATE OR REPLACE VIEW v2 AS SELECT * FROM t2;

CREATE OR REPLACE TABLE t3 (c INT) ENGINE=RocksDB;

BEGIN;

--connect (con1,localhost,root,,test)

SET lock_wait_timeout= 2;

--delimiter $

CREATE TRIGGER tr BEFORE UPDATE ON t3 FOR EACH ROW 

BEGIN

  DELETE FROM t1; 

  DELETE FROM non_existing_table; 

END $

--delimiter ;

--send

	ALTER TABLE t1 FORCE;

--connection default

DELETE FROM v2 WHERE b < 1;

--error ER_BAD_FIELD_ERROR

UPDATE t3 SET unknown_column = NULL;

--connection con1

--reap

INSERT INTO t1 VALUES (3);

# Cleanup

--disconnect con1

--connection default

COMMIT;

DROP VIEW v2;

DROP TABLE t1, t2, t3;

UNINSTALL SONAME 'ha_rocksdb';

#3  <signal handler called>

#4  0x000055d7081bc333 in key_unpack (to=0x7fa5e017e7a0, table=0x7fa5d0371c70, key=0x7fa5d03765d0) at /data/src/10.2-bug/sql/key.cc:432

#5  0x000055d7080caf56 in print_keydup_error (table=0x7fa5d0371c70, key=0x7fa5d03765d0, msg=0x55d70abcf1f4 "Duplicate entry '%-.64s' for key '%-.192s'", errflag=0) at /data/src/10.2-bug/sql/handler.cc:3334

#6  0x000055d7080cb094 in print_keydup_error (table=0x7fa5d0371c70, key=0x7fa5d03765d0, errflag=0) at /data/src/10.2-bug/sql/handler.cc:3356

#7  0x000055d7080cb2e8 in handler::print_error (this=0x7fa5d0372878, error=121, errflag=0) at /data/src/10.2-bug/sql/handler.cc:3433

#8  0x000055d707e2fc00 in write_record (thd=0x7fa5ac000b00, table=0x7fa5d0371c70, info=0x7fa5e01804a0) at /data/src/10.2-bug/sql/sql_insert.cc:1958

#9  0x000055d707e2d471 in mysql_insert (thd=0x7fa5ac000b00, table_list=0x7fa5ac011208, fields=..., values_list=..., update_fields=..., update_values=..., duplic=DUP_ERROR, ignore=false) at /data/src/10.2-bug/sql/sql_insert.cc:1057

#10 0x000055d707e54af7 in mysql_execute_command (thd=0x7fa5ac000b00) at /data/src/10.2-bug/sql/sql_parse.cc:4415

#11 0x000055d707e5fa6e in mysql_parse (thd=0x7fa5ac000b00, rawbuf=0x7fa5ac011128 "INSERT INTO t1 VALUES (3)", length=25, parser_state=0x7fa5e0181200, is_com_multi=false, is_next_command=false) at /data/src/10.2-bug/sql/sql_parse.cc:7900

#12 0x000055d707e4d97c in dispatch_command (command=COM_QUERY, thd=0x7fa5ac000b00, packet=0x7fa5ac008941 "INSERT INTO t1 VALUES (3)", packet_length=25, is_com_multi=false, is_next_command=false) at /data/src/10.2-bug/sql/sql_parse.cc:1805

#13 0x000055d707e4c2da in do_command (thd=0x7fa5ac000b00) at /data/src/10.2-bug/sql/sql_parse.cc:1360

#14 0x000055d707f9a225 in do_handle_one_connection (connect=0x55d70adddcc0) at /data/src/10.2-bug/sql/sql_connect.cc:1335

#15 0x000055d707f99fb2 in handle_one_connection (arg=0x55d70adddcc0) at /data/src/10.2-bug/sql/sql_connect.cc:1241

#16 0x000055d7083b936e in pfs_spawn_thread (arg=0x55d70ac0d730) at /data/src/10.2-bug/storage/perfschema/pfs.cc:1863

#17 0x00007fa5e7bc6494 in start_thread (arg=0x7fa5e0182700) at pthread_create.c:333

#18 0x00007fa5e5fac93f in clone () from /lib/x86_64-linux-gnu/libc.so.6

mysqltest: At line 31: query 'INSERT INTO t1 VALUES (3)' failed: 1022: Can't write; duplicate key in table 't1'