Server crashes in MYSQLparse upon IF with double brackets

--delimiter $

query IF AVG( ( SELECT 1 ) ) THEN 1 ; END IF $

--delimiter ;

DELIMITER $

IF AVG( ( SELECT 1 ) ) THEN 1 ; END IF $

DELIMITER ;

#3  <signal handler called>

#4  0x000055f0dc3b60eb in MYSQLparse (thd=0x7f3610000af0) at /data/src/10.4/sql/sql_yacc.yy:11922

#5  0x000055f0dc11203a in parse_sql (thd=0x7f3610000af0, parser_state=0x7f36229cb160, creation_ctx=0x0, do_pfs_digest=true) at /data/src/10.4/sql/sql_parse.cc:10206

#6  0x000055f0dc10c85e in mysql_parse (thd=0x7f3610000af0, rawbuf=0x7f36100132f0 "IF AVG( ( SELECT 1 ) ) THEN 1 ; END IF", length=38, parser_state=0x7f36229cb160, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:7853

#7  0x000055f0dc0f7bd0 in dispatch_command (command=COM_QUERY, thd=0x7f3610000af0, packet=0x7f3610136171 "IF AVG( ( SELECT 1 ) ) THEN 1 ; END IF ", packet_length=39, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:1842

#8  0x000055f0dc0f625d in do_command (thd=0x7f3610000af0) at /data/src/10.4/sql/sql_parse.cc:1360

#9  0x000055f0dc27f70f in do_handle_one_connection (connect=0x55f0dfe0b510) at /data/src/10.4/sql/sql_connect.cc:1412

#10 0x000055f0dc27f45e in handle_one_connection (arg=0x55f0dfe0b510) at /data/src/10.4/sql/sql_connect.cc:1316

#11 0x000055f0dcc87db3 in pfs_spawn_thread (arg=0x55f0dfd1f4a0) at /data/src/10.4/storage/perfschema/pfs.cc:1869

#12 0x00007f362a7aa4a4 in start_thread (arg=0x7f36229cc700) at pthread_create.c:456

#13 0x00007f36288ded0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97