[Draft] Assertion `(buff[7] & 7) == HEAD_PAGE || (buff[7] & 7) == UNALLOCATED_PAGE' failed in _ma_read_block_record

mysqld: /home/travis/src/storage/maria/ma_blockrec.c:5170: _ma_read_block_record: Assertion `(buff[7] & 7) == HEAD_PAGE || (buff[7] & 7) == UNALLOCATED_PAGE' failed.

181018  1:51:46 [ERROR] mysqld got signal 6 ;

Query (0x5634e0176228): LOAD DATA INFILE 'load_t7' REPLACE INTO TABLE t7 /* QNO 6460 CON_ID 8 */

Connection ID (thread ID): 8

Status: NOT_KILLED

#7  0x00007fd19dc05ca2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x00005634dd32a2f5 in _ma_read_block_record (info=0x5634e03adec0, record=0x5634e0598308 '\245' <repeats 200 times>..., record_pos=256) at /home/travis/src/storage/maria/ma_blockrec.c:5169

#9  0x00005634dd317ef4 in maria_rrnd (info=0x5634e03adec0, buf=0x5634e0598308 '\245' <repeats 200 times>..., filepos=256) at /home/travis/src/storage/maria/ma_rrnd.c:44

#10 0x00005634dd2c3f50 in ha_maria::rnd_pos (this=0x5634e05a6108, buf=0x5634e0598308 '\245' <repeats 200 times>..., pos=0x5634e0674f40 "") at /home/travis/src/storage/maria/ha_maria.cc:2480

#11 0x00005634dd0f73c9 in handler::ha_rnd_pos (this=0x5634e05a6108, buf=0x5634e0598308 '\245' <repeats 200 times>..., pos=0x5634e0674f40 "") at /home/travis/src/sql/handler.cc:2636

#12 0x00005634dce8b4d1 in write_record (thd=0x5634e017d880, table=0x5634e00e5f90, info=0x7fd1940a34a0) at /home/travis/src/sql/sql_insert.cc:1698

#13 0x00005634dd268de3 in read_sep_field (thd=0x5634e017d880, info=..., table_list=0x5634e01763c0, fields_vars=..., set_fields=..., set_values=..., read_info=..., enclosed=..., skip_lines=0, ignore_check_option_errors=false) at /home/travis/src/sql/sql_load.cc:1195

#14 0x00005634dd26706d in mysql_load (thd=0x5634e017d880, ex=0x5634e0176338, table_list=0x5634e01763c0, fields_vars=..., set_fields=..., set_values=..., handle_duplicates=DUP_REPLACE, ignore=false, read_file_from_client=false) at /home/travis/src/sql/sql_load.cc:589

#15 0x00005634dceafacb in mysql_execute_command (thd=0x5634e017d880) at /home/travis/src/sql/sql_parse.cc:4323

#16 0x00005634dceb91ca in mysql_parse (thd=0x5634e017d880, rawbuf=0x5634e0176228 "LOAD DATA INFILE 'load_t7' REPLACE INTO TABLE t7 /* QNO 6460 CON_ID 8 */", length=72, parser_state=0x7fd1940a4630) at /home/travis/src/sql/sql_parse.cc:7465

#17 0x00005634dcea7a4a in dispatch_command (command=COM_QUERY, thd=0x5634e017d880, packet=0x5634e016dd81 " LOAD DATA INFILE 'load_t7' REPLACE INTO TABLE t7 /* QNO 6460 CON_ID 8 */ ", packet_length=74) at /home/travis/src/sql/sql_parse.cc:1495

#18 0x00005634dcea67ca in do_command (thd=0x5634e017d880) at /home/travis/src/sql/sql_parse.cc:1124

#19 0x00005634dcfe2000 in do_handle_one_connection (thd_arg=0x5634e017d880) at /home/travis/src/sql/sql_connect.cc:1330

#20 0x00005634dcfe1d64 in handle_one_connection (arg=0x5634e017d880) at /home/travis/src/sql/sql_connect.cc:1242

#21 0x00007fd19e5b1184 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0

#22 0x00007fd19dcd3ffd in clone () from /lib/x86_64-linux-gnu/libc.so.6

perl ./runall-new.pl --basedir=/home/travis/server --vardir=/home/travis/logs/vardir --duration=350 --threads=6 --seed=1539827329 --reporters=Backtrace,ErrorLog,Deadlock --validators=TransformerNoComparator --views --redefine=conf/mariadb/alter_table.yy --redefine=conf/mariadb/sp.yy --redefine=conf/mariadb/bulk_insert.yy --mysqld=--log_output=FILE --mysqld=--max-statement-time=30 --mysqld=--lock-wait-timeout=10 --mysqld=--loose-innodb-lock-wait-timeout=5 --mysqld=--loose-debug_assert_on_not_freed_memory=0 --mysqld=--default-storage-engine=MyISAM --grammar=conf/partitioning/partition_pruning.yy --gendata=conf/partitioning/partition_pruning.zz --skip-gendata --gendata-advanced --vcols --transformers=ExecuteAsDeleteReturning,ExecuteAsInsertSelect,ExecuteAsUnion,ExecuteAsUpdateDelete,ExecuteAsView,ExecuteAsPreparedTwice