Wrong result when selecting from precise-versioned table

--source include/have_innodb.inc

create or replace table t1 (

  x int primary key,

  sys_trx_start bigint(20) unsigned as row start invisible,

  sys_trx_end bigint(20) unsigned as row end invisible,

  period for system_time (sys_trx_start, sys_trx_end)

) with system versioning engine innodb;

create or replace table t2 (

  x int primary key,

  sys_trx_start timestamp(6) as row start invisible,

  sys_trx_end timestamp(6) as row end invisible,

  period for system_time (sys_trx_start, sys_trx_end)

) with system versioning engine innodb;

set timestamp= unix_timestamp('2000-01-01 00:00:00');

insert into t1 values (1);

insert into t2 values (1);

set timestamp= unix_timestamp('2000-01-01 00:00:10');

delete from t1;

delete from t2;

set timestamp= unix_timestamp('2000-01-01 00:00:20');

insert into t1 values (2);

insert into t2 values (2);

# Bad result

select * from t1 for system_time as of '2000-01-01 00:00:09';

select * from t1 for system_time as of '2000-01-01 00:00:10';

# Good result

select * from t2 for system_time as of '2000-01-01 00:00:09';

select * from t2 for system_time as of '2000-01-01 00:00:10';

drop tables t1, t2;

select * from t1 for system_time as of '2000-01-01 00:00:09';

x

2

select * from t1 for system_time as of '2000-01-01 00:00:10';

x

2

select * from t2 for system_time as of '2000-01-01 00:00:09';

x

1

select * from t2 for system_time as of '2000-01-01 00:00:10';

x

select * from t1 for system_time as of '2000-01-01 00:00:09';

x

1

select * from t1 for system_time as of '2000-01-01 00:00:10';

x