main.ctype_cp932 fails in buildbot on a valgrind build

main.ctype_cp932                         w4 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2014-11-11 06:38:00

line

==19887== Thread 4:

==19887== Conditional jump or move depends on uninitialised value(s)

==19887==    at 0xE3EAB6: my_wildcmp_mb_bin_impl (ctype-mb.c:1195)

==19887==    by 0xE3EB31: my_wildcmp_mb_bin (ctype-mb.c:1208)

==19887==    by 0x7D3F73: Item_func_like::val_int() (item_cmpfunc.cc:4890)

==19887==    by 0x80474C: eval_const_cond(Item*) (item_func.cc:79)

==19887==    by 0x63A516: internal_remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:14982)

==19887==    by 0x63A724: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:15074)

==19887==    by 0x64567B: make_join_statistics(JOIN*, List<TABLE_LIST>&, Item*, st_dynamic_array*) (sql_select.cc:3839)

==19887==    by 0x646363: JOIN::optimize_inner() (sql_select.cc:1339)

==19887==    by 0x647FC2: JOIN::optimize() (sql_select.cc:1024)

==19887==    by 0x64B981: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:3294)

==19887==    by 0x64C8EB: handle_select(THD*, LEX*, select_result*, unsigned long) (sql_select.cc:373)

==19887==    by 0x5E370C: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5261)

==19887==    by 0x5EAFF4: mysql_execute_command(THD*) (sql_parse.cc:2545)

==19887==    by 0x5EDB19: mysql_parse(THD*, char*, unsigned int, Parser_state*) (sql_parse.cc:6407)

==19887==    by 0x5EF54B: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1299)

==19887==    by 0x5F0D31: do_command(THD*) (sql_parse.cc:996)

^ Found warnings in /dev/shm/var_auto_xTWj/4/log/mysqld.1.err