Server crashes in my_scan_weight_utf8_bin upon collecting stats for RocksDB table

#3  <signal handler called>

#4  0x00007fe6661f6249 in my_scan_weight_utf8_bin (weight=0x7fe65d5f88dc, str=0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address 0xa5a5a5a5a5a5a5a5>, end=0xa5a5a5a5a5a5a8a2 <error: Cannot access memory at address 0xa5a5a5a5a5a5a8a2>) at /data/src/10.2/strings/strcoll.ic:89

#5  0x00007fe6661f6525 in my_strnncollsp_utf8_bin (cs=0x7fe666d0da40 <my_charset_utf8_bin>, a=0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address 0xa5a5a5a5a5a5a5a5>, a_length=765, b=0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address 0xa5a5a5a5a5a5a5a5>, b_length=765) at /data/src/10.2/strings/strcoll.ic:245

#6  0x00007fe665a2e781 in Field_blob::cmp (this=0x7fe64c289918, a=0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address 0xa5a5a5a5a5a5a5a5>, a_length=765, b=0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address 0xa5a5a5a5a5a5a5a5>, b_length=765) at /data/src/10.2/sql/field.cc:8097

#7  0x00007fe665a2e834 in Field_blob::cmp_max (this=0x7fe64c289918, a_ptr=0x7fe64c251904 '\245' <repeats 200 times>..., b_ptr=0x7fe64c2512ed "\245\245\245\245\245\245\245\245\245\245\001", max_length=765) at /data/src/10.2/sql/field.cc:8110

#8  0x00007fe665b3fad5 in key_rec_cmp (key_p=0x7fe64c2204c8, first_rec=0x7fe64c2512f9 "\245\002", second_rec=0x7fe64c250ce2 "\245\001") at /data/src/10.2/sql/key.cc:612

#9  0x00007fe666175284 in cmp_key_part_id (key_p=0x7fe64c2204c8, ref1=0x7fe64c2512f7 "\001", ref2=0x7fe64c250ce0 "") at /data/src/10.2/sql/ha_partition.cc:5390

#10 0x00007fe6661ac6a5 in _downheap (queue=0x7fe64c2204f0, start_idx=1, element=0x7fe64c250ce0 "") at /data/src/10.2/mysys/queues.c:305

#11 0x00007fe6661ac844 in queue_fix (queue=0x7fe64c2204f0) at /data/src/10.2/mysys/queues.c:354

#12 0x00007fe666176d57 in ha_partition::handle_ordered_index_scan (this=0x7fe64c21fff8, buf=0x7fe64c288b68 "\372\002", reverse_order=false) at /data/src/10.2/sql/ha_partition.cc:6200

#13 0x00007fe666175807 in ha_partition::common_first_last (this=0x7fe64c21fff8, buf=0x7fe64c288b68 "\372\002") at /data/src/10.2/sql/ha_partition.cc:5588

#14 0x00007fe6661756ae in ha_partition::index_first (this=0x7fe64c21fff8, buf=0x7fe64c288b68 "\372\002") at /data/src/10.2/sql/ha_partition.cc:5536

#15 0x00007fe665a4e931 in handler::ha_index_first (this=0x7fe64c21fff8, buf=0x7fe64c288b68 "\372\002") at /data/src/10.2/sql/handler.cc:2725

#16 0x00007fe66588c4c7 in collect_statistics_for_index (thd=0x7fe64c000b00, table=0x7fe64c286be0, index=1) at /data/src/10.2/sql/sql_statistics.cc:2638

#17 0x00007fe66588ca58 in collect_statistics_for_table (thd=0x7fe64c000b00, table=0x7fe64c286be0) at /data/src/10.2/sql/sql_statistics.cc:2807

#18 0x00007fe66593434b in mysql_admin_table(THD *, TABLE_LIST *, HA_CHECK_OPT *, const char *, thr_lock_type, bool, bool, uint, int (*)(THD *, TABLE_LIST *, HA_CHECK_OPT *), struct {...}, int (*)(THD *, TABLE_LIST *, HA_CHECK_OPT *)) (thd=0x7fe64c000b00, tables=0x7fe64c012440, check_opt=0x7fe64c0054a0, operator_name=0x7fe6662736b7 "analyze", lock_type=TL_READ_NO_INSERT, open_for_modify=true, repair_table_use_frm=false, extra_open_options=0, prepare_func=0x0, operator_func=(int (handler::*)(handler * const, THD *, HA_CHECK_OPT *)) 0x7fe665a518ba <handler::ha_analyze(THD*, st_ha_check_opt*)>, view_operator_func=0x0) at /data/src/10.2/sql/sql_admin.cc:877

#19 0x00007fe665935d59 in Sql_cmd_analyze_table::execute (this=0x7fe64c012a50, thd=0x7fe64c000b00) at /data/src/10.2/sql/sql_admin.cc:1306

#20 0x00007fe6657e6119 in mysql_execute_command (thd=0x7fe64c000b00) at /data/src/10.2/sql/sql_parse.cc:6200

#21 0x00007fe6657ea9da in mysql_parse (thd=0x7fe64c000b00, rawbuf=0x7fe64c012348 "ANALYZE TABLE t1 PERSISTENT FOR ALL", length=35, parser_state=0x7fe65d5fa210, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7874

#22 0x00007fe6657d8ab2 in dispatch_command (command=COM_QUERY, thd=0x7fe64c000b00, packet=0x7fe64c0dfa01 "", packet_length=35, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1812

#23 0x00007fe6657d7422 in do_command (thd=0x7fe64c000b00) at /data/src/10.2/sql/sql_parse.cc:1362

#24 0x00007fe6659219e9 in do_handle_one_connection (connect=0x7fe667a5e700) at /data/src/10.2/sql/sql_connect.cc:1354

#25 0x00007fe665921776 in handle_one_connection (arg=0x7fe667a5e700) at /data/src/10.2/sql/sql_connect.cc:1260

#26 0x00007fe665d3a9d8 in pfs_spawn_thread (arg=0x7fe6679bc170) at /data/src/10.2/storage/perfschema/pfs.cc:1862

#27 0x00007fe664e00064 in start_thread (arg=0x7fe65d5fb700) at pthread_create.c:309

#28 0x00007fe6631f062d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

--source include/have_partition.inc

INSTALL SONAME 'ha_rocksdb';

CREATE TABLE t1 (

  pk INT,

  f1 CHAR(255),

  f2 TEXT,

  f3 VARCHAR(255),

  f4 TEXT,

  PRIMARY KEY (pk),

  KEY (f4(255))

) ENGINE=RocksDB

  CHARSET utf8

  COLLATE utf8_bin

  PARTITION BY KEY (pk) PARTITIONS 2;

INSERT INTO t1 VALUES

(1,'foo','bar','foo','bar'), (2,'bar','foo','bar','foo');

ANALYZE TABLE t1 PERSISTENT FOR ALL;