SIGSEGV in spider_db_ping on INSERT

SET sql_mode='';

INSTALL PLUGIN Spider SONAME 'ha_spider.so';

CREATE USER Spider@localhost IDENTIFIED BY 'PWD0';

CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET '../socket.sock',DATABASE 'test',user 'Spider',PASSWORD 'PWD0');

CREATE TABLE t (a INT) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "t"';

SET GLOBAL init_connect='dummy';

CREATE TABLE t0 (a INT) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "t"';

XA START 'a';

INSERT INTO t VALUES (1);

SHOW CREATE TABLE t0;

SELECT * FROM t0 JOIN t0 a ON a=a;

INSERT INTO t0 VALUES (1);

Core was generated by `/test/MD190922-mariadb-10.11.0-linux-x86_64-dbg/bin/mysqld --no-defaults --core'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  0x00001489425226ca in spider_db_ping (spider=0x1488f40df140, 

    conn=conn@entry=0x1488f408b3b8, link_idx=0)

    at /test/10.11_dbg/storage/spider/spd_db_conn.cc:230

[Current thread is 1 (Thread 0x148942675700 (LWP 1672792))]

(gdb) bt

#0  0x00001489425226ca in spider_db_ping (spider=0x1488f40df140, conn=conn@entry=0x1488f408b3b8, link_idx=0) at /test/10.11_dbg/storage/spider/spd_db_conn.cc:230

#1  0x000014894252292b in spider_db_conn_queue_action (conn=conn@entry=0x1488f408b3b8) at /test/10.11_dbg/storage/spider/spd_db_conn.cc:277

#2  0x000014894252afa5 in spider_db_before_query (conn=conn@entry=0x1488f408b3b8, need_mon=need_mon@entry=0x1488f40d2590) at /test/10.11_dbg/storage/spider/spd_db_conn.cc:586

#3  0x000014894252b701 in spider_db_set_names_internal (trx=0x1488f404c6c8, share=0x1488f40ae048, conn=conn@entry=0x1488f408b3b8, all_link_idx=0, need_mon=0x1488f40d2590) at /test/10.11_dbg/storage/spider/spd_db_conn.cc:813

#4  0x000014894252ba5d in spider_db_set_names (spider=spider@entry=0x1488f40ad500, conn=conn@entry=0x1488f408b3b8, link_idx=link_idx@entry=0) at /test/10.11_dbg/storage/spider/spd_db_conn.cc:857

#5  0x0000148942532cfd in spider_db_bulk_insert (spider=spider@entry=0x1488f40ad500, table=0x1488f40acce8, copy_info=copy_info@entry=0x1488f40ad8f0, bulk_end=bulk_end@entry=false) at /test/10.11_dbg/storage/spider/spd_db_conn.cc:5505

#6  0x00001489425abfb4 in ha_spider::write_row (this=0x1488f40ad500, buf=0x1488f40ad0e8 "\375\001") at /test/10.11_dbg/storage/spider/ha_spider.cc:7997

#7  0x00005557c1dfd2ff in handler::ha_write_row (this=0x1488f40ad500, buf=0x1488f40ad0e8 "\375\001") at /test/10.11_dbg/sql/handler.cc:7576

#8  0x00005557c1ab924a in write_record (thd=thd@entry=0x1488f4000d48, table=table@entry=0x1488f40acce8, info=info@entry=0x148942673b20, sink=sink@entry=0x0) at /test/10.11_dbg/sql/sql_insert.cc:2191

#9  0x00005557c1ac4885 in mysql_insert (thd=thd@entry=0x1488f4000d48, table_list=<optimized out>, fields=@0x1488f4005e38: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x5557c30d0be0 <end_of_list>, last = 0x1488f4005e38, elements = 0}, <No data fields>}, values_list=@0x1488f4005e80: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x1488f4013ee8, last = 0x1488f4013ee8, elements = 1}, <No data fields>}, update_fields=@0x1488f4005e68: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x5557c30d0be0 <end_of_list>, last = 0x1488f4005e68, elements = 0}, <No data fields>}, update_values=@0x1488f4005e50: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x5557c30d0be0 <end_of_list>, last = 0x1488f4005e50, elements = 0}, <No data fields>}, duplic=DUP_ERROR, ignore=false, result=0x0) at /test/10.11_dbg/sql/sql_insert.cc:1146

#10 0x00005557c1b07aa0 in mysql_execute_command (thd=thd@entry=0x1488f4000d48, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/10.11_dbg/sql/sql_parse.cc:4563

#11 0x00005557c1af403c in mysql_parse (thd=thd@entry=0x1488f4000d48, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x148942674330) at /test/10.11_dbg/sql/sql_parse.cc:8037

#12 0x00005557c1b0166d in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x1488f4000d48, packet=packet@entry=0x1488f400aed9 "INSERT INTO t0 VALUES (1)", packet_length=packet_length@entry=25, blocking=blocking@entry=true) at /test/10.11_dbg/sql/sql_class.h:1345

#13 0x00005557c1b03d97 in do_command (thd=0x1488f4000d48, blocking=blocking@entry=true) at /test/10.11_dbg/sql/sql_parse.cc:1407

#14 0x00005557c1c67fb9 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x5557c49a7fa8, put_in_cache=put_in_cache@entry=true) at /test/10.11_dbg/sql/sql_connect.cc:1416

#15 0x00005557c1c684c3 in handle_one_connection (arg=0x5557c49a7fa8) at /test/10.11_dbg/sql/sql_connect.cc:1318

#16 0x000014895f157609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#17 0x000014895ed43133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95