XA prepare don't release unmodified records in non-blocking mode

      if (!supremum_bit && rec_granted_exclusive_not_gap)                       

        continue;

--source include/have_innodb.inc                                                

--source include/count_sessions.inc                                             

CREATE TABLE t1 (a int, b int, c int,                                           

  INDEX i1(a),                                                                  

  INDEX i2(b))                                                                  

  ENGINE=InnoDB;                                                                

INSERT INTO t1 VALUES                                                           

  (1,1,0), (1,2,0),                                                             

  (2,1,0), (2,2,0);                                                             

SET @old_timeout= @@GLOBAL.innodb_lock_wait_timeout;                            

SET GLOBAL innodb_lock_wait_timeout= 1;                                         

XA START "t1";                                                                  

UPDATE t1 FORCE INDEX (i2) SET c=c+1 WHERE a=1 AND b=1;                         

XA END "t1";                                                                    

XA PREPARE "t1";                                                                

--connect(con1,localhost,root,,)                                                

# (pk, 2, 1, 0) record is X-locked but not modified in clustered index with the 

# above XA transaction, if the bug is not fixed, the following SELECT will be   

# blocked by the XA transaction if XA PREPARE does not release the unmodified   

# record.                                                                       

SELECT * FROM t1 FORCE INDEX (i1) WHERE a=2 AND b=1 FOR UPDATE;                 

--disconnect con1                                                               

--connection default                                                            

XA COMMIT "t1";                                                                 

DROP TABLE t1;                                                                  

SET GLOBAL innodb_lock_wait_timeout= @old_timeout;                              

--source include/wait_until_count_sessions.inc