select.result:

  After merge fix

mysql-test/r/select.result

@@ -2720,6 +2720,16 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t3	index	PRIMARY,a,b	PRIMARY	8	NULL	2	Using index
 1	SIMPLE	t2	ALL	PRIMARY	NULL	NULL	NULL	2	Range checked for each record (index map: 0x1)
 DROP TABLE t1,t2,t3;
+CREATE TABLE t1 (a int, INDEX idx(a));
+INSERT INTO t1 VALUES (2), (3), (1);
+EXPLAIN SELECT * FROM t1 IGNORE INDEX (idx);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	
+EXPLAIN SELECT * FROM t1 IGNORE INDEX (a);
+ERROR HY000: Key 'a' doesn't exist in table 't1'
+EXPLAIN SELECT * FROM t1 FORCE INDEX (a);
+ERROR HY000: Key 'a' doesn't exist in table 't1'
+DROP TABLE t1;
 CREATE TABLE t1 ( 
 K2C4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '', 
 K4N4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '0000',