Conditional jump or move depends on uninitialised value in my_scan_weight_utf8_general_ci, main.mysql_client_test fails in biuldbot with valgrind

main.mysql_client_test                   w3 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-04-27 08:29:11

line

==7510== Thread 7:

==7510== Conditional jump or move depends on uninitialised value(s)

==7510==    at 0xF65694: my_scan_weight_utf8_general_ci (strcoll.ic:89)

==7510==    by 0xF6584D: my_strnncoll_utf8_general_ci (strcoll.ic:175)

==7510==    by 0xEEFA4D: hashcmp (hash.c:370)

==7510==    by 0xEEF821: my_hash_first_from_hash_value (hash.c:285)

==7510==    by 0xEEF76C: my_hash_first (hash.c:257)

==7510==    by 0xEEF6C3: my_hash_search (hash.c:231)

==7510==    by 0x6331F9: plugin_find_internal(st_mysql_lex_string const*, int) (sql_plugin.cc:900)

==7510==    by 0x633627: plugin_lock_by_name(THD*, st_mysql_lex_string const*, int) (sql_plugin.cc:1026)

==7510==    by 0x874809: ha_table_exists(THD*, char const*, char const*, handlerton**) (handler.cc:5034)

==7510==    by 0x6D4B12: mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool) (sql_table.cc:2399)

==7510==    by 0x6D4087: mysql_rm_table(THD*, TABLE_LIST*, char, char) (sql_table.cc:2084)

==7510==    by 0x621276: mysql_execute_command(THD*) (sql_parse.cc:4243)

==7510== Use of uninitialised value of size 8

==7510==    at 0xF65549: my_weight_mb1_utf8_general_ci (ctype-utf8.c:5362)

==7510==    by 0xF656A6: my_scan_weight_utf8_general_ci (strcoll.ic:91)

==7510==    by 0xF6584D: my_strnncoll_utf8_general_ci (strcoll.ic:175)

==7510==    by 0xEEFA4D: hashcmp (hash.c:370)

==7510==    by 0xEEF821: my_hash_first_from_hash_value (hash.c:285)

==7510==    by 0xEEF76C: my_hash_first (hash.c:257)

==7510==    by 0xEEF6C3: my_hash_search (hash.c:231)

==7510==    by 0x6331F9: plugin_find_internal(st_mysql_lex_string const*, int) (sql_plugin.cc:900)

==7510==    by 0x633627: plugin_lock_by_name(THD*, st_mysql_lex_string const*, int) (sql_plugin.cc:1026)

==7510==    by 0x874809: ha_table_exists(THD*, char const*, char const*, handlerton**) (handler.cc:5034)

==7510==    by 0x6D4B12: mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool, bool) (sql_table.cc:2399)

==7510==    by 0x6D4087: mysql_rm_table(THD*, TABLE_LIST*, char, char) (sql_table.cc:2084)