150618  1:50:07 [ERROR] 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.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

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.

Server version: 10.1.5-MariaDB-log

key_buffer_size=67108864

read_buffer_size=131072

max_used_connections=5

max_threads=502

thread_count=1

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1168091 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x7fef8fefb008

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 = 0x7fef90491e58 thread_stack 0x48000

mysys/stacktrace.c:247(my_print_stacktrace)[0x7fef931dcbf9]

sql/signal_handler.cc:153(handle_fatal_signal)[0x7fef92def98d]

/lib/x86_64-linux-gnu/libpthread.so.0(+0xf8d0)[0x7fef924498d0]

sql/sql_plist.h:181(I_P_List_iterator)[0x7fef92da6360]

mysys/lf_hash.c:125(lfind)[0x7fef931e3a5c]

include/my_atomic.h:281(my_atomic_storeptr)[0x7fef931e4459]

sql/table_cache.cc:1084(tdc_iterate(THD*, char (*)(void*, void*), void*, bool))[0x7fef92da7fb3]

sql/table_cache.cc:267(tc_add_table(THD*, TABLE*))[0x7fef92da833a]

sql/sql_base.cc:2572(open_table(THD*, TABLE_LIST*, Open_table_context*))[0x7fef92c42f0d]

sql/sql_base.cc:4019(open_and_process_table)[0x7fef92c46557]

sql/sql_base.cc:5184(open_and_lock_tables(THD*, DDL_options_st const&, TABLE_LIST*, bool, unsigned int, Prelocking_strategy*))[0x7fef92c46c1d]

sql/sql_admin.cc:446(mysql_admin_table)[0x7fef92d576d6]

sql/sql_admin.cc:1210(Sql_cmd_check_table::execute(THD*))[0x7fef92d59046]

sql/sql_parse.cc:5573(mysql_execute_command(THD*))[0x7fef92c839fc]

sql/sql_parse.cc:7173(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x7fef92c8a334]

sql/sql_parse.cc:1470(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x7fef92c8cb80]

sql/sql_parse.cc:1095(do_command(THD*))[0x7fef92c8d29b]

sql/sql_connect.cc:1347(do_handle_one_connection(THD*))[0x7fef92d4c80c]

sql/sql_connect.cc:1260(handle_one_connection)[0x7fef92d4c9e7]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x80a4)[0x7fef924420a4]

/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fef9085c04d]

Trying to get some variables.

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

Query (0x7fef5eb49020): is an invalid pointer

Connection ID (thread ID): 17307

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_conditio

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.

150618 01:50:07 mysqld_safe Number of processes running now: 0

150618 01:50:07 mysqld_safe mysqld restarted

2015-06-18  1:50:07 139723066570624 [Note] /usr/local/mysql/bin/mysqld (mysqld 10.1.5-MariaDB-log) starting as process 16564 ...