--source include/force_myisam_default.inc
--source include/have_myisam.inc

--echo #
--echo # Bug #21840241 "IMPROPER SE REFERENCE COUNTING IN ATTACHABLE TRANSACTIONS"
--echo #
CREATE TABLE t1 (i INT PRIMARY KEY) ENGINE=MyISAM;
CREATE TABLE t2 (i INT PRIMARY KEY) ENGINE=MyISAM;
--echo # Decrease Table Cache size and fill it with MyISAM tables.
SET @save_table_open_cache= @@global.table_open_cache;
SET @@GLOBAL.table_open_cache=32;
SELECT * FROM t1;
SELECT * FROM t2;
--echo # Usage of non-existent time zone will start attachable transaction
--echo # which will access time zone tables. This will expel MyISAM tables
--echo # from the Table Cache and creation of MyISAM specific connection
--echo # local data. Without proper cleanup at the end of attachable
--echo # transaction this data was reported as leaked memory by valgrind.
SELECT CONVERT_TZ('2015-01-01 00:00:00', 'UTC', 'No-such-time-zone');
SET @@global.table_open_cache= @save_table_open_cache;
DROP TABLES t1, t2;