SIGSEGV in spider_db_delete_all_rows on TRUNCATE, UBSAN: member call on null pointer of type 'struct spider_db_handler' in spider_db_delete_all_rows

INSTALL PLUGIN spider SONAME 'ha_spider.so';

CREATE TABLE t2(c INT) ENGINE=InnoDB;  # Same with MyISAM

CREATE TABLE t1(c INT) ENGINE=Spider COMMENT='socket "../socket.sock",table "t2 t3"';

ALTER TABLE t1 ENGINE=Spider;

TRUNCATE TABLE t1;

Core was generated by `/test/MD271223-mariadb-11.4.0-linux-x86_64-opt/bin/mariadbd --no-defaults --cor'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  spider_db_delete_all_rows (spider=spider@entry=0x1508300b38d0)

    at /test/11.4_opt/storage/spider/spd_db_conn.cc:6529

[Current thread is 1 (Thread 0x15086c101640 (LWP 1723536))]

(gdb) bt

#0  spider_db_delete_all_rows (spider=spider@entry=0x1508300b38d0) at /test/11.4_opt/storage/spider/spd_db_conn.cc:6529

#1  0x000015085c1910e1 in ha_spider::truncate (this=0x1508300b38d0) at /test/11.4_opt/storage/spider/ha_spider.cc:8315

#2  ha_spider::truncate (this=0x1508300b38d0) at /test/11.4_opt/storage/spider/ha_spider.cc:8296

#3  0x00005579bf76aa8b in Sql_cmd_truncate_table::handler_truncate (this=<optimized out>, thd=0x150830000c68, table_ref=0x150830010bb8, is_tmp_table=<optimized out>) at /test/11.4_opt/sql/sql_truncate.cc:255

#4  0x00005579bf76b820 in Sql_cmd_truncate_table::truncate_table (this=0x1508300112d0, thd=0x150830000c68, table_ref=0x150830010bb8) at /test/11.4_opt/sql/sql_truncate.cc:515

#5  0x00005579bf76b9ee in Sql_cmd_truncate_table::execute (this=0x1508300112d0, thd=0x150830000c68) at /test/11.4_opt/sql/sql_truncate.cc:581

#6  0x00005579bf61d419 in mysql_execute_command (thd=0x150830000c68, is_called_from_prepared_stmt=<optimized out>) at /test/11.4_opt/sql/sql_parse.cc:5738

#7  0x00005579bf61e346 in mysql_parse (thd=0x150830000c68, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /test/11.4_opt/sql/sql_parse.cc:7748

#8  0x00005579bf620aed in dispatch_command (command=COM_QUERY, thd=0x150830000c68, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /test/11.4_opt/sql/sql_parse.cc:1992

#9  0x00005579bf6228a0 in do_command (thd=0x150830000c68, blocking=blocking@entry=true) at /test/11.4_opt/sql/sql_parse.cc:1406

#10 0x00005579bf74ca1f in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at /test/11.4_opt/sql/sql_connect.cc:1418

#11 0x00005579bf74cd6d in handle_one_connection (arg=arg@entry=0x5579c2105cb8) at /test/11.4_opt/sql/sql_connect.cc:1320

#12 0x00005579bfaf6561 in pfs_spawn_thread (arg=0x5579c20baeb8) at /test/11.4_opt/storage/perfschema/pfs.cc:2201

#13 0x0000150874c94ac3 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442

#14 0x0000150874d26660 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Core was generated by `/test/MD271223-mariadb-11.4.0-linux-x86_64-dbg/bin/mariadbd --no-defaults --max'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  spider_db_delete_all_rows (spider=spider@entry=0x145af8085b80)

    at /test/11.4_dbg/storage/spider/spd_db_conn.cc:6529

[Current thread is 1 (Thread 0x145b340e8640 (LWP 1724345))]

(gdb) bt

#0  spider_db_delete_all_rows (spider=spider@entry=0x145af8085b80) at /test/11.4_dbg/storage/spider/spd_db_conn.cc:6529

#1  0x0000145b24182515 in ha_spider::truncate (this=0x145af8085b80) at /test/11.4_dbg/storage/spider/ha_spider.cc:8315

#2  0x00005607cfee2044 in handler::ha_truncate (this=0x145af8085b80) at /test/11.4_dbg/sql/handler.cc:5310

#3  0x00005607cfd740cd in Sql_cmd_truncate_table::handler_truncate (this=this@entry=0x145af8013cd0, thd=thd@entry=0x145af8000d58, table_ref=table_ref@entry=0x145af80135b8, is_tmp_table=is_tmp_table@entry=false) at /test/11.4_dbg/sql/sql_truncate.cc:255

#4  0x00005607cfd74fa7 in Sql_cmd_truncate_table::truncate_table (this=this@entry=0x145af8013cd0, thd=thd@entry=0x145af8000d58, table_ref=table_ref@entry=0x145af80135b8) at /test/11.4_dbg/sql/sql_truncate.cc:515

#5  0x00005607cfd750f2 in Sql_cmd_truncate_table::execute (this=0x145af8013cd0, thd=0x145af8000d58) at /test/11.4_dbg/sql/sql_truncate.cc:581

#6  0x00005607cfbd7130 in mysql_execute_command (thd=thd@entry=0x145af8000d58, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/11.4_dbg/sql/sql_parse.cc:5738

#7  0x00005607cfbd84bb in mysql_parse (thd=thd@entry=0x145af8000d58, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x145b340e71e0) at /test/11.4_dbg/sql/sql_parse.cc:7748

#8  0x00005607cfbda831 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x145af8000d58, packet=packet@entry=0x145af800b1c9 "TRUNCATE TABLE t1", packet_length=packet_length@entry=17, blocking=blocking@entry=true) at /test/11.4_dbg/sql/sql_class.h:253

#9  0x00005607cfbdc956 in do_command (thd=0x145af8000d58, blocking=blocking@entry=true) at /test/11.4_dbg/sql/sql_parse.cc:1406

#10 0x00005607cfd418b7 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x5607d230cc88, put_in_cache=put_in_cache@entry=true) at /test/11.4_dbg/sql/sql_connect.cc:1418

#11 0x00005607cfd41bac in handle_one_connection (arg=arg@entry=0x5607d230cc88) at /test/11.4_dbg/sql/sql_connect.cc:1320

#12 0x00005607d018673a in pfs_spawn_thread (arg=0x5607d22add18) at /test/11.4_dbg/storage/perfschema/pfs.cc:2201

#13 0x0000145b3da94ac3 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442

#14 0x0000145b3db26660 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

2024-01-06  9:31:33 0 [Note] /test/UBASAN_MD021123-mariadb-11.3.0-linux-x86_64-opt/bin/mariadbd: ready for connections.

Version: '11.3.0-MariaDB'  socket: '/test/UBASAN_MD021123-mariadb-11.3.0-linux-x86_64-opt/socket.sock'  port: 11043  MariaDB Server

/test/11.3_opt_san/storage/spider/spd_db_conn.cc:6529:49: runtime error: member call on null pointer of type 'struct spider_db_handler'

    #0 0x14c8becea46f in spider_db_delete_all_rows(ha_spider*) /test/11.3_opt_san/storage/spider/spd_db_conn.cc:6529

    #1 0x14c8bee6143d in ha_spider::truncate() /test/11.3_opt_san/storage/spider/ha_spider.cc:8315

    #2 0x563d9094e753 in Sql_cmd_truncate_table::handler_truncate(THD*, TABLE_LIST*, bool) /test/11.3_opt_san/sql/sql_truncate.cc:255

    #3 0x563d90954306 in Sql_cmd_truncate_table::truncate_table(THD*, TABLE_LIST*) /test/11.3_opt_san/sql/sql_truncate.cc:515

    #4 0x563d909553bc in Sql_cmd_truncate_table::execute(THD*) /test/11.3_opt_san/sql/sql_truncate.cc:581

    #5 0x563d8fececec in mysql_execute_command(THD*, bool) /test/11.3_opt_san/sql/sql_parse.cc:5734

    #6 0x563d8feee302 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.3_opt_san/sql/sql_parse.cc:7742

    #7 0x563d8fef9925 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.3_opt_san/sql/sql_parse.cc:1893

    #8 0x563d8ff05698 in do_command(THD*, bool) /test/11.3_opt_san/sql/sql_parse.cc:1406

    #9 0x563d90847e0c in do_handle_one_connection(CONNECT*, bool) /test/11.3_opt_san/sql/sql_connect.cc:1418

    #10 0x563d9084a40c in handle_one_connection /test/11.3_opt_san/sql/sql_connect.cc:1320

    #11 0x14c8e1a94ac2 in start_thread nptl/pthread_create.c:442

    #12 0x14c8e1b2665f  (/lib/x86_64-linux-gnu/libc.so.6+0x12665f)

240106  9:31:38 [ERROR] mysqld got signal 11 ;

Version: '11.3.0-MariaDB-debug'  socket: '/test/UBASAN_MD021123-mariadb-11.3.0-linux-x86_64-dbg/socket.sock'  port: 11207  MariaDB Server

/test/11.3_dbg_san/storage/spider/spd_db_conn.cc:6529:49: runtime error: member call on null pointer of type 'struct spider_db_handler'

    #0 0x1455ac1052bf in spider_db_delete_all_rows(ha_spider*) /test/11.3_dbg_san/storage/spider/spd_db_conn.cc:6529

    #1 0x1455ac27d746 in ha_spider::truncate() /test/11.3_dbg_san/storage/spider/ha_spider.cc:8315

    #2 0x5646ed7c0634 in handler::ha_truncate() /test/11.3_dbg_san/sql/handler.cc:5310

    #3 0x5646ecacc834 in Sql_cmd_truncate_table::handler_truncate(THD*, TABLE_LIST*, bool) /test/11.3_dbg_san/sql/sql_truncate.cc:255

    #4 0x5646ecad2557 in Sql_cmd_truncate_table::truncate_table(THD*, TABLE_LIST*) /test/11.3_dbg_san/sql/sql_truncate.cc:515

    #5 0x5646ecad2e00 in Sql_cmd_truncate_table::execute(THD*) /test/11.3_dbg_san/sql/sql_truncate.cc:581

    #6 0x5646ebf6d0eb in mysql_execute_command(THD*, bool) /test/11.3_dbg_san/sql/sql_parse.cc:5734

    #7 0x5646ebf73d9b in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.3_dbg_san/sql/sql_parse.cc:7742

    #8 0x5646ebf83b19 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.3_dbg_san/sql/sql_parse.cc:1893

    #9 0x5646ebf91b9b in do_command(THD*, bool) /test/11.3_dbg_san/sql/sql_parse.cc:1406

    #10 0x5646ec9953ab in do_handle_one_connection(CONNECT*, bool) /test/11.3_dbg_san/sql/sql_connect.cc:1418

    #11 0x5646ec9968c6 in handle_one_connection /test/11.3_dbg_san/sql/sql_connect.cc:1320

    #12 0x1455cec94ac2 in start_thread nptl/pthread_create.c:442

    #13 0x1455ced2665f  (/lib/x86_64-linux-gnu/libc.so.6+0x12665f)

240106  9:31:41 [ERROR] mysqld got signal 11 ;