FLUSH TABLES;
CREATE TABLE t1 (a SERIAL, b INT, c INT, d INT) ENGINE=InnoDB;
INSERT INTO t1 () VALUES ();
connect  con1,localhost,root,,test;
SET DEBUG_SYNC='before_rename_table_commit SIGNAL renamed WAIT_FOR ever';
RENAME TABLE t1 TO t2;
connection default;
SET DEBUG_SYNC='now WAIT_FOR renamed';
# restart
disconnect con1;
SELECT * FROM t1;
a	b	c	d
1	NULL	NULL	NULL
DROP TABLE t1;