TokuDB tables not properly cleaned on DROP DATABASE

CREATE DATABASE test1;

use test1;

CREATE TABLE test (a int) ENGINE=TokuDB;

DROP DATABASE test1;

CREATE DATABASE test1;

use test1;

CREATE TABLE test (a int) ENGINE=TokuDB;

ERROR 1050 (42S01): Table 'test' already exists

l _test1*                                                                                                                                                                                                                        <17:26:09

-rwxrwx--x 1 mysql mysql 32768 mars  12 17:25 _test1_test_main_6a41cf66_2_18.tokudb

-rwxrwx--x 1 mysql mysql 16384 mars  12 17:25 _test1_test_status_6a41cf66_1_18.tokudb

skip-external-locking

skip-name-resolve

ignore_builtin_innodb

plugin-load-add=ha_innodb

transaction-isolation="READ-UNCOMMITTED"

plugin-load-add=ha_tokudb

tokudb_commit_sync="OFF"

tokudb_cache_size=14G

tokudb_lock_timeout=120000

tokudb_row_format="tokudb_small"

innodb_lock_wait_timeout=120

default_storage_engine=InnoDB

max_allowed_packet=16M

key_buffer_size=128M

table_cache=4096

read_buffer_size=4M

read_rnd_buffer_size=2M

thread_cache_size=80

delayed_insert_limit=500

max_delayed_threads=60

join_buffer_size=2M

sort_buffer_size=2M

delayed_insert_timeout=20

wait_timeout=1800

max_connections=400

back_log=1300

myisam_sort_buffer_size=512M

thread_concurrency=8

tmp_table_size=1G

table_definition_cache = 8192

concurrent_insert=2

innodb_buffer_pool_size=4G

innodb_log_file_size=128M

innodb_log_files_in_group=2

innodb_log_buffer_size=8M

innodb_flush_log_at_trx_commit=2

innodb_thread_concurrency=16

innodb_read_io_threads=8

innodb_write_io_threads=8

innodb_flush_method=O_DIRECT

innodb_file_per_table=1

innodb_io_capacity=2000

innodb_file_format=Barracuda

myisam-recover         = BACKUP

query_cache_limit=2M

query_cache_size=32M

log-error       = /home/mysql/log/log-error.log