main.mysql_client_test_comp failed in buildbot, error on exec

main.mysql_client_test_comp              w1 [ fail ]

        Test ended at 2018-06-19 08:14:10

CURRENT_TEST: main.mysql_client_test_comp

mysqltest: At line 14: exec of 'D:\win32-debug\build\tests\Debug\mysql_client_test.exe --defaults-file=D:/win32-debug/build/mysql-test/var/1/my.cnf --testcase --vardir=D:/win32-debug/build/mysql-test/var/1 --getopt-ll-test=25600M >> D:/win32-debug/build/mysql-test/var/1/log/mysql_client_test_comp.out.log 2>&1' failed, error: 1, status: 1, errno: 2

Output from before failure:

call mtr.add_suppression(" IP address .* could not be resolved");

The result from queries just before the failure was:

SET @old_slow_query_log= @@global.slow_query_log;

call mtr.add_suppression(" Error reading file './client_test_db/test_frm_bug.frm'");

call mtr.add_suppression(" IP address .* could not be resolved");

 - saving 'D:/win32-debug/build/mysql-test/var/1/log/main.mysql_client_test_comp/'