Page split breaks a gap lock

--source include/have_innodb.inc

--source include/have_sequence.inc

--source include/have_debug.inc

SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;

SET GLOBAL innodb_purge_rseg_truncate_frequency=1;

CREATE TABLE t1(id INT PRIMARY key, val VARCHAR(16000)) ENGINE=InnoDB;

INSERT INTO t1 (id,val) SELECT 2*seq,'x' FROM seq_0_to_1023;

connect(con1,localhost,root,,);

# Prevent purge.

START TRANSACTION WITH CONSISTENT SNAPSHOT;

connection default;

DELETE FROM t1 WHERE id=1788;

BEGIN;

# This will return no result, but should acquire a gap lock.

SELECT * FROM t1 WHERE id=1788 FOR UPDATE;

connection con1;

COMMIT;

source include/wait_all_purged.inc;

connection default;

INSERT INTO t1 (id,val) VALUES (1787, REPEAT('x',2000));

connection con1;

SET innodb_lock_wait_timeout=0;

--error ER_LOCK_WAIT_TIMEOUT

INSERT INTO t1 (id,val) VALUES (1788, 'x');

SELECT * FROM t1 WHERE id=1788 FOR UPDATE;

disconnect con1;

connection default;

COMMIT;

DROP TABLE t1;

SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;