[SQL Layer] Server crashes in Field::set_null / myrocks::ha_rocksdb::convert_record_from_storage_format

INSTALL SONAME 'ha_rocksdb';

CREATE TABLE t1 (i INT);

INSERT INTO t1 VALUES (1);

CREATE TABLE t2 ENGINE=RocksDB AS SELECT VALUES(i) AS a FROM t1;

DELETE FROM t2;

# Cleanup

DROP TABLE IF EXISTS t1, t2;

UNINSTALL SONAME 'ha_rocksdb';

#3  <signal handler called>

#4  0x00007f2eff6641d3 in Field::set_null (this=0x7f2f04378f88, row_offset=0) at /data/src/10.2/sql/./field.h:1135

#5  0x00007f2eff6425a7 in myrocks::ha_rocksdb::convert_record_from_storage_format (this=0x7f2f04378758, key=0x7f2f14244ba0, value=0x7f2f14244b40, buf=0x7f2f04378f68 "\377", '\245' <repeats 15 times>, "\210\217\067\004/\177") at /data/src/10.2/storage/rocksdb/ha_rocksdb.cc:5345

#6  0x00007f2eff641da8 in myrocks::ha_rocksdb::convert_record_from_storage_format (this=0x7f2f04378758, key=0x7f2f14244ba0, buf=0x7f2f04378f68 "\377", '\245' <repeats 15 times>, "\210\217\067\004/\177") at /data/src/10.2/storage/rocksdb/ha_rocksdb.cc:5150

#7  0x00007f2eff64ef04 in myrocks::ha_rocksdb::rnd_next_with_direction (this=0x7f2f04378758, buf=0x7f2f04378f68 "\377", '\245' <repeats 15 times>, "\210\217\067\004/\177", move_forward=true) at /data/src/10.2/storage/rocksdb/ha_rocksdb.cc:9352

#8  0x00007f2eff64e9cc in myrocks::ha_rocksdb::rnd_next (this=0x7f2f04378758, buf=0x7f2f04378f68 "\377", '\245' <repeats 15 times>, "\210\217\067\004/\177") at /data/src/10.2/storage/rocksdb/ha_rocksdb.cc:9251

#9  0x000055de70bc0c67 in handler::ha_rnd_next (this=0x7f2f04378758, buf=0x7f2f04378f68 "\377", '\245' <repeats 15 times>, "\210\217\067\004/\177") at /data/src/10.2/sql/handler.cc:2576

#10 0x000055de70d2cd8c in rr_sequential (info=0x7f2f14244ed0) at /data/src/10.2/sql/records.cc:485

#11 0x000055de70d5862c in mysql_delete (thd=0x7f2f04000b00, table_list=0x7f2f040125c0, conds=0x0, order_list=0x7f2f04005040, limit=18446744073709551615, options=0, result=0x0) at /data/src/10.2/sql/sql_delete.cc:559

#12 0x000055de7094d230 in mysql_execute_command (thd=0x7f2f04000b00) at /data/src/10.2/sql/sql_parse.cc:4616

#13 0x000055de709575f1 in mysql_parse (thd=0x7f2f04000b00, rawbuf=0x7f2f040124f8 "DELETE FROM t2", length=14, parser_state=0x7f2f14246200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7902

#14 0x000055de70945511 in dispatch_command (command=COM_QUERY, thd=0x7f2f04000b00, packet=0x7f2f0416b561 "DELETE FROM t2", packet_length=14, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1806

#15 0x000055de70943e74 in do_command (thd=0x7f2f04000b00) at /data/src/10.2/sql/sql_parse.cc:1360

#16 0x000055de70a9264a in do_handle_one_connection (connect=0x55de72f433e0) at /data/src/10.2/sql/sql_connect.cc:1335

#17 0x000055de70a923d7 in handle_one_connection (arg=0x55de72f433e0) at /data/src/10.2/sql/sql_connect.cc:1241

#18 0x000055de70eb19a4 in pfs_spawn_thread (arg=0x55de72f1dea0) at /data/src/10.2/storage/perfschema/pfs.cc:1862

#19 0x00007f2f1bc41494 in start_thread (arg=0x7f2f14247700) at pthread_create.c:333

#20 0x00007f2f1a02793f in clone () from /lib/x86_64-linux-gnu/libc.so.6