Concurrent trigger creation causes errors and corrupts the trigger

CREATE TRIGGER tr AFTER INSERT ON t2 FOR EACH ROW SET @a=1 failed: 7 Error on rename of './test/tr.TRN~' to './test/tr.TRN' (Errcode: 2 - No such file or directory)

MySQL [test]> show triggers;

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

| Trigger | Event  | Table | Statement | Timing | Created | sql_mode               | Definer        | character_set_client | collation_connection | Database Collation |

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

| tr      | INSERT | t1    | SET @a=1  | AFTER  | NULL    | NO_ENGINE_SUBSTITUTION | root@127.0.0.1 | latin1               | latin1_swedish_ci    | latin1_swedish_ci  |

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

1 row in set (0.00 sec)

MySQL [test]> show create trigger tr;

ERROR 1360 (HY000): Trigger does not exist

$ cat tr.TRN 

TYPE=TRIGGERNAME

trigger_table=t2

$ ls -l *.TRG

-rw-rw---- 1 elenst elenst 255 Sep 30 19:02 t1.TRG

query_init:

    CREATE TABLE IF NOT EXISTS t1 (i INT); CREATE TABLE t2 LIKE t1;

my_table:

    t1 | t2 ;

query:

      CREATE TRIGGER tr AFTER INSERT ON my_table FOR EACH ROW SET @a=1

    | DROP TRIGGER tr

;

perl ./runall-new.pl --grammar=1.yy --threads=2 --skip-gendata --duration=200 --queries=100M --basedir=<basedir> --vardir=<vardir>