main.mdev375 fails sporadically in buildbot

main.mdev375                             w3 [ fail ]

        Test ended at 2016-05-24 22:20:04

CURRENT_TEST: main.mdev375

mysqltest: At line 9: query 'connect  con1,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:

SET GLOBAL log_warnings=4;

SET GLOBAL max_connections=2;

 - saving 'D:/winx64-debug/build/mysql-test/var/3/log/main.mdev375/' to 'D:/winx64-debug/build/mysql-test/var/log/main.mdev375/'

Retrying test main.mdev375, attempt(2/3)...