2013-02-17 10:14:56 40259940 InnoDB: Error: Fetch of persistent statistics requested for table "mydb"."file_info" but the required system tables mysql.innodb_table_stats and mysql.innodb_index_stats are not present or have unexpected structure. Using transient stats instead.
2013-02-17 10:14:56 4d36a940 InnoDB: Error: Table "mysql"."innodb_table_stats" not found.
2013-02-17 10:14:56 4d36a940 InnoDB: Error: Fetch of persistent statistics requested for table "mydb"."config" but the required system tables mysql.innodb_table_stats and mysql.innodb_index_stats are not present or have unexpected structure. Using transient stats instead.
09:15:21 UTC - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed, 
something is definitely wrong and this may fail.

key_buffer_size=268435456
read_buffer_size=131072
max_used_connections=4
max_threads=151
thread_count=1
connection_count=1
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 322168 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x1206d1b0
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...
stack_bottom = 4d3ab0a0 thread_stack 0x40000
/usr/sbin/mysqld(my_print_stacktrace+0x35)[0x8ff785]
/usr/sbin/mysqld(handle_fatal_signal+0x3e8)[0x66e9b8]
/lib64/libpthread.so.0[0x328c20ebe0]
/usr/sbin/mysqld[0x694995]
/usr/sbin/mysqld(_Z11mysql_grantP3THDPKcR4ListI11st_lex_userEmbb+0x525)[0x6987c5]
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x5a85)[0x6f0545]
/usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x318)[0x6f1858]
/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1005)[0x6f2955]
/usr/sbin/mysqld(_Z10do_commandP3THD+0xd7)[0x6f3497]
/usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x116)[0x6bd5c6]
/usr/sbin/mysqld(handle_one_connection+0x45)[0x6bd6a5]
/usr/sbin/mysqld(pfs_spawn_thread+0x13b)[0x9790cb]
/lib64/libpthread.so.0[0x328c20677d]
/lib64/libc.so.6(clone+0x6d)[0x328b2d3c1d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (120c71e0): grant usage on *.* to root@localhost identified by 'xxxxxxxxxxxx'
Connection ID (thread ID): 5
Status: NOT_KILLED

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
130217 10:15:21 mysqld_safe Number of processes running now: 0
130217 10:15:21 mysqld_safe mysqld restarted
2013-02-17 10:15:22 0 [Warning] The syntax 'pre-4.1 password hash' is deprecated and will be removed in a future release. Please use post-4.1 password hash instead.
2013-02-17 10:15:22 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2013-02-17 10:15:22 31959 [Note] Plugin 'FEDERATED' is disabled.
2013-02-17 10:15:22 31959 [Note] InnoDB: The InnoDB memory heap is disabled
2013-02-17 10:15:22 31959 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2013-02-17 10:15:22 31959 [Note] InnoDB: Compressed tables use zlib 1.2.3
2013-02-17 10:15:22 31959 [Note] InnoDB: CPU does not support crc32 instructions
2013-02-17 10:15:22 31959 [Note] InnoDB: Using Linux native AIO
2013-02-17 10:15:22 31959 [Note] InnoDB: Initializing buffer pool, size = 512.0M
2013-02-17 10:15:22 31959 [Note] InnoDB: Completed initialization of buffer pool
2013-02-17 10:15:22 31959 [Note] InnoDB: Highest supported file format is Barracuda.
2013-02-17 10:15:22 31959 [Note] InnoDB: The log sequence numbers 16086581846 and 16086581846 in ibdata files do not match the log sequence number 16086584072 in the ib_logfiles!
2013-02-17 10:15:22 31959 [Note] InnoDB: Database was not shutdown normally!
2013-02-17 10:15:22 31959 [Note] InnoDB: Starting crash recovery.
2013-02-17 10:15:22 31959 [Note] InnoDB: Reading tablespace information from the .ibd files...
2013-02-17 10:15:22 31959 [Note] InnoDB: Restoring possible half-written data pages 
2013-02-17 10:15:22 31959 [Note] InnoDB: from the doublewrite buffer...
InnoDB: Last MySQL binlog file position 0 3025, file name binlog.000068
2013-02-17 10:15:22 31959 [Note] InnoDB: 128 rollback segment(s) are active.
2013-02-17 10:15:22 31959 [Note] InnoDB: Waiting for purge to start
2013-02-17 10:15:22 31959 [Note] InnoDB: 1.2.10 started; log sequence number 16086584072
2013-02-17 10:15:22 31959 [Note] Recovering after a crash using ../log/binlog
2013-02-17 10:15:22 31959 [Note] Starting crash recovery...
2013-02-17 10:15:22 31959 [Note] Crash recovery finished.
2013-02-17 10:15:22 31959 [Note] Server hostname (bind-address): '192.A.B.C'; port: 3306
2013-02-17 10:15:22 31959 [Note]   - '192.A.B.C' resolves to '192.A.B.C';
2013-02-17 10:15:22 31959 [Note] Server socket created on IP: '192.A.B.C'.
2013-02-17 10:15:22 31959 [Warning] Info table is not ready to be used. Table 'mysql.slave_master_info' cannot be opened.
2013-02-17 10:15:22 31959 [Warning] Info table is not ready to be used. Table 'mysql.slave_relay_log_info' cannot be opened.
2013-02-17 10:15:22 31959 [ERROR] Column count of mysql.events_waits_current is wrong. Expected 19, found 16. Created with MySQL 50525, now running 50610. Please use mysql_upgrade to fix this error.
2013-02-17 10:15:22 31959 [ERROR] Column count of mysql.events_waits_history is wrong. Expected 19, found 16. Created with MySQL 50525, now running 50610. Please use mysql_upgrade to fix this error.
2013-02-17 10:15:22 31959 [ERROR] Column count of mysql.events_waits_history_long is wrong. Expected 19, found 16. Created with MySQL 50525, now running 50610. Please use mysql_upgrade to fix this error.
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'events_waits_summary_by_host_by_event_name' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Incorrect definition of table performance_schema.events_waits_summary_by_thread_by_event_name: expected column 'THREAD_ID' at position 0 to have type bigint(20), found type int(11).
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'events_waits_summary_by_user_by_event_name' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'events_waits_summary_by_account_by_event_name' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Column count of mysql.file_summary_by_event_name is wrong. Expected 23, found 5. Created with MySQL 50525, now running 50610. Please use mysql_upgrade to fix this error.
2013-02-17 10:15:22 31959 [ERROR] Column count of mysql.file_summary_by_instance is wrong. Expected 25, found 6. Created with MySQL 50525, now running 50610. Please use mysql_upgrade to fix this error.
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'host_cache' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Incorrect definition of table performance_schema.mutex_instances: expected column 'LOCKED_BY_THREAD_ID' at position 2 to have type bigint(20), found type int(11).
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'objects_summary_global_by_type' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Incorrect definition of table performance_schema.rwlock_instances: expected column 'WRITE_LOCKED_BY_THREAD_ID' at position 2 to have type bigint(20), found type int(11).
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'setup_actors' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'setup_objects' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'table_io_waits_summary_by_index_usage' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'table_io_waits_summary_by_table' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'table_lock_waits_summary_by_table' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Column count of mysql.threads is wrong. Expected 14, found 3. Created with MySQL 50525, now running 50610. Please use mysql_upgrade to fix this error.
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'events_stages_current' has the wrong structure
2013-02-17 10:15:22 31959 [ERROR] Native table 'performance_schema'.'events_stages_history' has the wrong structure