CURRENT_TEST: parts.partition_engine_innodb
mysqltest: In included file "./suite/parts/inc/partition_check_read.inc": 
included from ./suite/parts/inc/partition_check.inc at line 292:
included from ./suite/parts/inc/partition_engine.inc at line 288:
included from /home/buildbot/buildbot/build/mariadb-12.1.0/mysql-test/suite/parts/t/partition_engine_innodb.test at line 76:
At line 83: query 'let $run= `SELECT @aux`' failed: <Unknown> (2013): Lost connection to server during query

The result from queries just before the failure was:
< snip >
  `f_charbig` varchar(1000) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 PARTITION BY RANGE (`f_int1`)
SUBPARTITION BY HASH (`f_int1`)
(PARTITION `part1` VALUES LESS THAN (1000)
 (SUBPARTITION `subpart11` ENGINE = InnoDB,
  SUBPARTITION `subpart12` ENGINE = InnoDB))

# check prerequisites-1 success:    1
# check COUNT(*) success:    1
# check MIN/MAX(f_int1) success:    1
# check MIN/MAX(f_int2) success:    1
INSERT INTO t1 (f_int1, f_int2, f_char1, f_char2, f_charbig)
SELECT f_int1, f_int1, CAST(f_int1 AS CHAR),
CAST(f_int1 AS CHAR), 'delete me' FROM t0_template
WHERE f_int1 IN (2,3);
# check prerequisites-3 success:    1
DELETE FROM t1 WHERE f_charbig = 'delete me';
# INFO: Neither f_int1 nor f_int2 nor (f_int1,f_int2) is UNIQUE
# check read via f_int1 success: 1

More results from queries before failure can be found in /dev/shm/var/1/log/partition_engine_innodb.log
