$ perl ./mtr rpl.rpl_timezone --valgrind

==14430== Thread 13:

==14430== Use of uninitialised value of size 8

==14430==    at 0xBA4D9F: inline_mysql_mutex_trylock (mysql_thread.h:728)

==14430==    by 0xBA9251: Table_cache_instance::lock_and_check_contention(unsigned int, unsigned int) (table_cache.cc:168)

==14430==    by 0xBA5A18: tc_acquire_table(THD*, TDC_element*) (table_cache.cc:417)

==14430==    by 0xBA76A2: tdc_acquire_share(THD*, TABLE_LIST*, unsigned int, TABLE**) (table_cache.cc:872)

==14430==    by 0x8645B9: open_table(THD*, TABLE_LIST*, Open_table_context*) (sql_base.cc:1944)

==14430==    by 0x86866A: open_and_process_table(THD*, TABLE_LIST*, unsigned int*, unsigned int, Prelocking_strategy*, bool, Open_table_context*) (sql_base.cc:3850)

==14430==    by 0x869913: open_tables(THD*, DDL_options_st const&, TABLE_LIST**, unsigned int*, unsigned int, Prelocking_strategy*) (sql_base.cc:4324)

==14430==    by 0x86BA8F: open_and_lock_tables(THD*, DDL_options_st const&, TABLE_LIST*, bool, unsigned int, Prelocking_strategy*) (sql_base.cc:5217)

==14430==    by 0x860467: open_and_lock_tables(THD*, TABLE_LIST*, bool, unsigned int, Prelocking_strategy*) (sql_base.h:271)

==14430==    by 0x86B310: open_n_lock_single_table(THD*, TABLE_LIST*, thr_lock_type, unsigned int, Prelocking_strategy*) (sql_base.cc:5060)

==14430==    by 0x8C494F: Delayed_insert::open_and_lock_table() (sql_insert.cc:2990)

==14430==    by 0x8C4C4D: handle_delayed_insert (sql_insert.cc:3093)

==14430==    by 0x14F87EC: pfs_spawn_thread (pfs.cc:1862)

==14430==    by 0x4E3F4A3: start_thread (pthread_create.c:456)

==14430==    by 0x6938D0E: clone (clone.S:97)