Description:
Checking "DATA_FREE" shows a different value when comparing information_schema.TABLES vs information_schema.PARTITIONS:

mysql> SELECT
-> TABLE_SCHEMA,
-> TABLE_NAME,
-> PARTITION_NAME,
-> DATA_LENGTH,
-> DATA_FREE
-> FROM
-> information_schema.PARTITIONS
-> WHERE
-> PARTITION_NAME IS NOT NULL
-> AND TABLE_NAME='temp_table' and TABLE_SCHEMA = 'bugtest';
------------------------------------------------------+----------+

------------------------------------------------------+----------+

------------------------------------------------------+----------+

mysql> SELECT
-> TABLE_SCHEMA,
-> TABLE_NAME,
-> DATA_LENGTH,
-> DATA_FREE
-> FROM
-> information_schema.TABLES
-> WHERE TABLE_NAME='temp_table' and TABLE_SCHEMA = 'bugtest';
--------------------------------------------------+

--------------------------------------------------+

--------------------------------------------------+
How to repeat:
create database bugtest;
use bugtest;

drop table if exists bugtest.temp_table;

CREATE TABLE temp_table (
id INT NOT NULL auto_increment primary key,
value INT NOT NULL
)
PARTITION BY RANGE (id) (
PARTITION p0 VALUES LESS THAN (10000),
PARTITION p1 VALUES LESS THAN MAXVALUE
);

Do data load:
for i in {1..40000}
do
mysql -e "INSERT INTO bugtest.temp_table (id, value) VALUES (null, $i );"
done

Then check with the above queries.
Suggested fix:
DATA_FREE should be consistent in both IS tables