180307  5:08:09 [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 https://mariadb.com/kb/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: 10.2.13-MariaDB-log

key_buffer_size=67108864

read_buffer_size=131072

max_used_connections=385

max_threads=1002

thread_count=387

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 2267636 K  bytes of memory

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

Thread pointer: 0x7f6f4c0008c8

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 = 0x7f72bc2d7d70 thread_stack 0x40000

(my_addr_resolve failure: fork)

/usr/sbin/mysqld(my_print_stacktrace+0x2e) [0x5616225e03fe]

/usr/sbin/mysqld(handle_fatal_signal+0x355) [0x561622075fb5]

/lib64/libpthread.so.0(+0xf5e0) [0x7f72d62095e0]

/usr/sbin/mysqld(Explain_query::add_node(Explain_node*)+0xa8) [0x561621fa5078]

/usr/sbin/mysqld(JOIN::save_explain_data_intern(Explain_query*, bool, bool, bool, char const*)+0xbbf) [0x561621f066ff]

/usr/sbin/mysqld(JOIN::build_explain()+0x70) [0x561621f06a40]

/usr/sbin/mysqld(JOIN::optimize()+0x58) [0x561621f0d338]

/usr/sbin/mysqld(mysql_derived_optimize(THD*, LEX*, TABLE_LIST*)+0xd7) [0x561621e8d5e7]

/usr/sbin/mysqld(mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int)+0xe4) [0x561621e8cf44]

/usr/sbin/mysqld(st_select_lex::handle_derived(LEX*, unsigned int)+0x47) [0x561621ea2ee7]

/usr/sbin/mysqld(JOIN::optimize_inner()+0x575) [0x561621f0cdf5]

/usr/sbin/mysqld(JOIN::optimize()+0x36) [0x561621f0d316]

/usr/sbin/mysqld(mysql_select(THD*, 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*)+0x94) [0x561621f0e8c4]

/usr/sbin/mysqld(handle_select(THD*, LEX*, select_result*, unsigned long)+0x15e) [0x561621f0f3be]

/usr/sbin/mysqld(mysql_execute_command(THD*)+0x78a5) [0x561621ebefb5]

/usr/sbin/mysqld(sp_instr_stmt::exec_core(THD*, unsigned int*)+0x36) [0x561621e30a06]

/usr/sbin/mysqld(sp_lex_keeper::reset_lex_and_exec_core(THD*, unsigned int*, bool, sp_instr*)+0x99) [0x561621e385c9]

/usr/sbin/mysqld(sp_instr_stmt::execute(THD*, unsigned int*)+0x205) [0x561621e38bc5]

/usr/sbin/mysqld(sp_head::execute(THD*, bool)+0x83e) [0x561621e3462e]

/usr/sbin/mysqld(sp_head::execute_procedure(THD*, List<Item>*)+0x73d) [0x561621e3575d]

/usr/sbin/mysqld(+0x55bbd9) [0x561621eb0bd9]

/usr/sbin/mysqld(+0x55d906) [0x561621eb2906]

/usr/sbin/mysqld(Sql_cmd_call::execute(THD*)+0x90) [0x561621eb3100]

/usr/sbin/mysqld(mysql_execute_command(THD*)+0x14fb) [0x561621eb8c0b]

/usr/sbin/mysqld(sp_instr_stmt::exec_core(THD*, unsigned int*)+0x36) [0x561621e30a06]

/usr/sbin/mysqld(sp_lex_keeper::reset_lex_and_exec_core(THD*, unsigned int*, bool, sp_instr*)+0x99) [0x561621e385c9]

/usr/sbin/mysqld(sp_instr_stmt::execute(THD*, unsigned int*)+0x205) [0x561621e38bc5]

/usr/sbin/mysqld(sp_head::execute(THD*, bool)+0x83e) [0x561621e3462e]

/usr/sbin/mysqld(sp_head::execute_procedure(THD*, List<Item>*)+0x73d) [0x561621e3575d]

/usr/sbin/mysqld(+0x55bbd9) [0x561621eb0bd9]

/usr/sbin/mysqld(+0x55d906) [0x561621eb2906]

/usr/sbin/mysqld(Sql_cmd_call::execute(THD*)+0x90) [0x561621eb3100]

/usr/sbin/mysqld(mysql_execute_command(THD*)+0x14fb) [0x561621eb8c0b]

/usr/sbin/mysqld(Prepared_statement::execute(String*, bool)+0x4de) [0x561621ed31ee]

/usr/sbin/mysqld(+0x57e39f) [0x561621ed339f]

/usr/sbin/mysqld(+0x57f1ff) [0x561621ed41ff]

/usr/sbin/mysqld(mysqld_stmt_execute(THD*, char*, unsigned int)+0x27) [0x561621ed4287]

/usr/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool)+0x14e8) [0x561621ec2f48]

/usr/sbin/mysqld(do_command(THD*)+0x149) [0x561621ec47a9]

/usr/sbin/mysqld(do_handle_one_connection(CONNECT*)+0x1aa) [0x561621f88eba]

/usr/sbin/mysqld(handle_one_connection+0x3d) [0x561621f88fdd]

/lib64/libpthread.so.0(+0x7e25) [0x7f72d6201e25]

/lib64/libc.so.6(clone+0x6d) [0x7f72d485434d]

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=on,mrr_cost_based=on,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_grouping_derived=on

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.