Description of problem:
trying to run tps, I got server crash

Version-Release number of selected component (if applicable):
mariadb-5.5.60-1.el7_5.src.rpm

Actual results:
parts.partition_alter1_2_innodb 'innodb_plugin' [ fail ]  timeout after 1800 seconds
        Test ended at 2018-06-14 20:24:28

Test case timeout after 1800 seconds

== /home/test/rpmbuild/BUILD/mariadb-5.5.60/mysql-test/var/log/partition_alter1_2_innodb.log == 
WHERE f_int1 BETWEEN @max_row_div2 - 1 AND @max_row_div2 + 1;
CREATE TRIGGER trg_1 AFTER DELETE ON t0_aux FOR EACH ROW
BEGIN
UPDATE t1 SET f_int1 = -f_int1, f_int2 = -f_int2,
f_charbig = 'updated by trigger'
      WHERE f_int1 = - old.f_int1;
END|
DELETE FROM t0_aux
WHERE f_int1 IN (- (@max_row_div2 - 1),- @max_row_div2,- (@max_row_div2 + 1));
	
# check trigger-8 success: 	1
DROP TRIGGER trg_1;
UPDATE t1 SET f_int1 = CAST(f_char1 AS SIGNED INT),
f_int2 = CAST(f_char1 AS SIGNED INT),
f_charbig = 'just inserted'
   WHERE f_int1 <> CAST(f_char1 AS SIGNED INT);
DELETE FROM t0_aux
WHERE ABS(f_int1) BETWEEN @max_row_div2 - 1 AND @max_row_div2 + 1;
DELETE FROM t1
WHERE f_int1 BETWEEN @max_row_div2 - 1 AND @max_row_div2 + 1;

 == /home/test/rpmbuild/BUILD/mariadb-5.5.60/mysql-test/var/tmp/analyze-timeout-mysqld.1.err ==
mysqltest: Could not open connection 'default': 2013 Lost connection to MySQL server at 'reading initial communication packet', system error: 104


 - saving '/home/test/rpmbuild/BUILD/mariadb-5.5.60/mysql-test/var/log/parts.partition_alter1_2_innodb-innodb_plugin/' to '/home/test/rpmbuild/BUILD/mariadb-5.5.60/mysql-test/var/log/parts.partition_alter1_2_innodb-innodb_plugin/'
 - found 'core.718' (0/5)