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/usr/lib/mysql-testsuite/r/percona_bug1384568.result is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.

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CREATE TABLE t(a INT KEY, b BLOB) ENGINE=MyISAM;
SELECT * FROM t x WHERE (a, b) IN ((0, 0), (1,0));
a	b
DROP TABLE t;
CREATE TABLE t(a INT KEY, b BLOB) ENGINE=MyISAM;
EXPLAIN SELECT * FROM t x WHERE (a, b) IN ((0, 0), (1,0));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
DROP TABLE t;