main.merge failed in buildbot

main.merge                               w4 [ fail ]

        Test ended at 2016-08-15 16:14:48

CURRENT_TEST: main.merge

mysqltest: At line 741: query 'connect  con2,localhost,root,,' failed: 2003: Can't connect to MySQL server on 'localhost' (0 "Internal error/check (Not system error)")

The result from queries just before the failure was:

< snip >

c1

SELECT * FROM t1;

c1

SELECT * FROM t2;

c1

#

# Truncate temporary child table under locked tables.

INSERT INTO t1 VALUES (1);

INSERT INTO t2 VALUES (2);

TRUNCATE TABLE t1;

SELECT * FROM t3;

c1

2

SELECT * FROM t1;

c1

SELECT * FROM t2;

c1

2

UNLOCK TABLES;

DROP TABLE t1, t2, t3, t4;

More results from queries before failure can be found in D:\winx64-debug\build\mysql-test\var\4\log\merge.log

 - saving 'D:/winx64-debug/build/mysql-test/var/4/log/main.merge/' to 'D:/winx64-debug/build/mysql-test/var/log/main.merge/'