0xc0000005 crash

200227  9:34:30 [ERROR] mysqld got exception 0xc0000005 ;

Thread pointer: 0x27b25b329b8

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

mysqld.exe!my_wc_to_printable_generic()[ctype.c:1055]

mysqld.exe!my_convert_using_func()[ctype.c:1141]

mysqld.exe!convert_error_message()[sql_error.cc:959]

mysqld.exe!net_send_error_packet()[protocol.cc:456]

mysqld.exe!Protocol::end_statement()[protocol.cc:599]

mysqld.exe!do_command()[sql_parse.cc:1258]

mysqld.exe!threadpool_process_request()[threadpool_common.cc:369]

mysqld.exe!tp_callback()[threadpool_common.cc:196]

ntdll.dll!RtlInitializeCriticalSection()

ntdll.dll!RtlReleaseSRWLockExclusive()

KERNEL32.DLL!BaseThreadInitThunk()

ntdll.dll!RtlUserThreadStart()

Some pointers may be invalid and cause the dump to abort.

Query (0x0): 

Connection ID (thread ID): 704

Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off

CREATE TABLE `online` (

  `o_id` int(10) unsigned NOT NULL AUTO_INCREMENT,

  `o_ip` varchar(35) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,

  `o_user` int(11) NOT NULL DEFAULT 0,

  `o_lastDate` datetime NOT NULL DEFAULT '1987-11-13 00:00:00',

  `o_url` varchar(155) NOT NULL DEFAULT '',

  `o_source` int(11) NOT NULL DEFAULT 0,

  `o_imstate` datetime NOT NULL DEFAULT '1987-11-13 00:00:00',

  PRIMARY KEY (`o_id`),

  UNIQUE KEY `user` (`o_user`) USING BTREE,

  KEY `date` (`o_lastDate`,`o_user`) USING BTREE

) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8 MAX_ROWS=10000;