Spider crash when selecting literal

CREATE TABLE t1(c1 INTEGER);

CREATE TABLE t1s(c1 INTEGER) ENGINE=SPIDER COMMENT="host '127.0.0.1', user 'root', table 't1'";

SELECT c1 FROM t1s;

SELECT 1 FROM t1s;

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

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: 10.3.9-MariaDB

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=2

max_threads=153

thread_count=28

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467396 K  bytes of memory

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

Thread pointer: 0x7f603ff309a8

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 = 0x7f60192cfd70 thread_stack 0x49000

mysys/stacktrace.c:270(my_print_stacktrace)[0x7f603c3a366e]

sql/signal_handler.cc:168(handle_fatal_signal)[0x7f603be33f37]

sigaction.c:0(__restore_rt)[0x7f603b283100]

spider/spd_db_mysql.cc:12892(spider_mysql_handler::append_list_item_select(List<Item>*, spider_string*, char const*, unsigned int, bool, spider_fields*))[0x7f602e467751]

spider/spd_group_by_handler.cc:1264(spider_group_by_handler::init_scan())[0x7f602e46acdf]

sql/group_by_handler.cc:49(Pushdown_query::execute(JOIN*))[0x7f603bcd3ad3]

sql/sql_select.cc:18741(do_select)[0x7f603bcb770a]

sql/sql_select.cc:3823(JOIN::exec())[0x7f603bcb7f93]

sql/sql_select.cc:4229(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*))[0x7f603bcb80ea]

sql/sql_select.cc:382(handle_select(THD*, LEX*, select_result*, unsigned long))[0x7f603bcb8bfc]

sql/sql_parse.cc:6547(execute_sqlcom_select)[0x7f603bb6e19f]

sql/sql_parse.cc:3768(mysql_execute_command(THD*))[0x7f603bc64fbd]

sql/sql_parse.cc:8089(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x7f603bc677cb]

sql/sql_parse.cc:1850(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x7f603bc6a315]

sql/sql_parse.cc:1397(do_command(THD*))[0x7f603bc6b17e]

sql/sql_connect.cc:1402(do_handle_one_connection(CONNECT*))[0x7f603bd3b50a]

sql/sql_connect.cc:1310(handle_one_connection)[0x7f603bd3b62d]

pthread_create.c:0(start_thread)[0x7f603b27bdc5]

/lib64/libc.so.6(clone+0x6d)[0x7f60398d1ced]

Trying to get some variables.

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

Query (0x7f603ff403b0): select 1 from t1s

Connection ID (thread ID): 28

Status: NOT_KILLED