Crash in metadata lock plugin

MariaDB [information_schema]> select * from METADATA_LOCK_INFO where table_name='session';

ERROR 2013 (HY000): Lost connection to MySQL server during query

160128 16:02:34 [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: 10.0.22-MariaDB-enterprise-wsrep-log

key_buffer_size=67108864

read_buffer_size=131072

max_used_connections=127

max_threads=501

thread_count=162

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1236419 K  bytes of memory

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

Thread pointer: 0x0x7f36738ae008

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 = 0x7f36043c6cb0 thread_stack 0x48000

160128 16:02:36 [Warning] WSREP: last inactive check more than PT1.5S ago (PT2.365S), skipping check

/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0xbf632e]

/usr/sbin/mysqld(handle_fatal_signal+0x390)[0x758be0]

/lib64/libpthread.so.0(+0xf100)[0x7f599c853100]

/usr/sbin/mysqld[0xc1d389]

/usr/sbin/mysqld(_Z23well_formed_copy_ncharsPK15charset_info_stPcjS1_PKcjjPS4_S5_S5_+0x1a2)[0x6598d2]

/usr/sbin/mysqld(_ZN15Field_varstring5storeEPKcjPK15charset_info_st+0x67)[0x7495f7]

/usr/lib64/mysql/plugin/metadata_lock_info.so(_Z31i_s_metadata_lock_info_fill_rowP10MDL_ticketPv+0x130)[0x7f51971fd020]

/usr/sbin/mysqld[0x6b659e]

/usr/sbin/mysqld(_Z11mdl_iteratePFiP10MDL_ticketPvES1_+0x29)[0x6b68c9]

/usr/lib64/mysql/plugin/metadata_lock_info.so(_Z33i_s_metadata_lock_info_fill_tableP3THDP10TABLE_LISTP4Item+0x27)[0x7f51971fd137]

/usr/sbin/mysqld(_Z24get_schema_tables_resultP4JOIN23enum_schema_table_state+0x26e)[0x64cd0e]

/usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0x705)[0x633a75]

/usr/sbin/mysqld(_ZN4JOIN4execEv+0x11)[0x635bf1]

/usr/sbin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0xc7)[0x632567]

/usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x27d)[0x6330ad]

/usr/sbin/mysqld[0x5d118e]

/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x566f)[0x5e063f]

/usr/sbin/mysqld[0x5e4af1]

/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1c8f)[0x5e6cdf]

/usr/sbin/mysqld(_Z10do_commandP3THD+0x242)[0x5e7a32]

/usr/sbin/mysqld(_Z26threadpool_process_requestP3THD+0xc7)[0x6e9e37]

/usr/sbin/mysqld[0x72bc8d]

/lib64/libpthread.so.0(+0x7dc5)[0x7f599c84bdc5]

/lib64/libc.so.6(clone+0x6d)[0x7f599b0c721d]

Trying to get some variables.

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

Query (0x7f35a5841020): is an invalid pointer

Connection ID (thread ID): 87123

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=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