Oleksandr Byelkin added a comment - 2022-07-21 08:15 You do not dig deeper so this will crash server again: diff --git a/mysql-test/main/subselect4.test b/mysql-test/main/subselect4.test index a59f4bbcdac..c41fbcfa7b7 100644 --- a/mysql-test/main/subselect4.test +++ b/mysql-test/main/subselect4.test @@ -2452,7 +2452,7 @@ insert into t3 values (7), (1); let $q1= select a from t1 - where a >= any (select b from t2 group by (select c from t3 where c = 1)); + where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1)); eval explain extended $q1; eval $q1; @@ -2464,7 +2464,7 @@ deallocate prepare stmt; let $q2= select a from t1 - where a <= all (select b from t2 group by (select c from t3 where c = 1)); + where a <= all (select b from t2 group by 1 + (select c from t3 where c = 1)); eval explain extended $q2; eval $q2; here is result: CURRENT_TEST: main.subselect4 mysqltest: At line 2458: query '$q1' failed: 2013: Lost connection to MySQL server during query   The result from queries just before the failure was: < snip > DROP TABLE t1; # End of 10.2 tests # # MDEV-29139: Redundannt subquery in GROUP BY clause of ANY/ALL subquery # create table t1 (a int); insert into t1 values (3), (1), (2); create table t2 (b int not null); insert into t2 values (4), (2); create table t3 (c int); insert into t3 values (7), (1); explain extended select a from t1 where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <nop>(<in_optimizer>(`test`.`t1`.`a`,(/* select#2 */ select min(`test`.`t2`.`b`) from `test`.`t2`) <= <cache>(`test`.`t1`.`a`))) select a from t1 where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1));   More results from queries before failure can be found in /home/sanja/maria/git/10.3/mysql-test/var/log/subselect4.log     Server [mysqld.1 - pid: 36431, winpid: 36431, exit: 256] failed during test run Server log from this test: ----------SERVER LOG START----------- $ /home/sanja/maria/git/10.3/sql/mysqld --defaults-group-suffix=.1 --defaults-file=/home/sanja/maria/git/10.3/mysql-test/var/my.cnf --log-output=file --loose-sequence --core-file --loose-debug-sync-timeout=300 2022-07-21 10:12:17 0 [Note] /home/sanja/maria/git/10.3/sql/mysqld (mysqld 10.3.36-MariaDB-debug-log) starting as process 36432 ... 2022-07-21 10:12:17 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 32198) 2022-07-21 10:12:17 0 [Warning] Changed limits: max_open_files: 1024 max_connections: 151 (was 151) table_cache: 421 (was 2000) 2022-07-21 10:12:17 0 [Note] Plugin 'partition' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'InnoDB' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_DATAFILES' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_TABLESTATS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_LOCKS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_MUTEXES' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMPMEM' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP_PER_INDEX' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_DELETED' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP_RESET' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_LOCK_WAITS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_TABLESPACES_ENCRYPTION' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_BUFFER_PAGE_LRU' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_FIELDS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMPMEM_RESET' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'FEEDBACK' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_COLUMNS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_INDEX_TABLE' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP_PER_INDEX_RESET' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'user_variables' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_INDEX_CACHE' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_FOREIGN_COLS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_BEING_DELETED' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_BUFFER_POOL_STATS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_TRX' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_FOREIGN' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_TABLES' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_DEFAULT_STOPWORD' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_CONFIG' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_BUFFER_PAGE' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_TABLESPACES' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_METRICS' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_INDEXES' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_VIRTUAL' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_TABLESPACES_SCRUBBING' is disabled. 2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_SEMAPHORE_WAITS' is disabled. 2022-07-21 10:12:17 0 [Warning] /home/sanja/maria/git/10.3/sql/mysqld: unknown option '--loose-pam-debug' 2022-07-21 10:12:17 0 [Note] Server socket created on IP: '127.0.0.1'. 2022-07-21 10:12:17 0 [Note] Reading of all Master_info entries succeeded 2022-07-21 10:12:17 0 [Note] Added new Master_info '' to hash table 2022-07-21 10:12:17 0 [Note] /home/sanja/maria/git/10.3/sql/mysqld: ready for connections. Version: '10.3.36-MariaDB-debug-log' socket: '/home/sanja/maria/git/10.3/mysql-test/var/tmp/mysqld.1.sock' port: 16000 Source distribution mysqld: /home/sanja/maria/git/10.3/sql/item_subselect.cc:766: virtual bool Item_subselect::exec(): Assertion `!eliminated' failed. 220721 10:12:18 [ERROR] mysqld got signal 6 ; 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: 10.3.36-MariaDB-debug-log key_buffer_size=1048576 read_buffer_size=131072 max_used_connections=1 max_threads=153 thread_count=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 63289 K bytes of memory Hope that's ok; if not, decrease some variables in the equation.   Thread pointer: 0x7fa0c0000da0 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 = 0x7fa0dcddcda8 thread_stack 0x49000 mysys/stacktrace.c:174(my_print_stacktrace)[0x560fb50d5ee5] sql/signal_handler.cc:231(handle_fatal_signal)[0x560fb47746dd] libc_sigaction.c:0(__restore_rt)[0x7fa0e2cf1520] nptl/pthread_kill.c:44(__pthread_kill_implementation)[0x7fa0e2d45a7c] posix/raise.c:27(__GI_raise)[0x7fa0e2cf1476] stdlib/abort.c:81(__GI_abort)[0x7fa0e2cd77f3] intl/loadmsgcat.c:1177(_nl_load_domain)[0x7fa0e2cd771b] :0(__GI___assert_fail)[0x7fa0e2ce8e96] sql/item_subselect.cc:768(Item_subselect::exec())[0x560fb485f780] sql/item_subselect.cc:1415(Item_singlerow_subselect::val_int())[0x560fb4861bfb] sql/item_func.cc:1213(Item_func_plus::int_op())[0x560fb4808fc6] sql/item_func.cc:854(Item_func_hybrid_field_type::val_str_from_int_op(String*))[0x560fb4807891] sql/sql_type.cc:3524(Type_handler_int_result::Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type*, String*) const)[0x560fb464ab83] /home/sanja/maria/git/10.3/sql/mysqld(_ZN27Item_func_hybrid_field_type7val_strEP6String+0xbf)[0x560fb440cfeb] /home/sanja/maria/git/10.3/sql/mysqld(_ZN16Item_copy_string4copyEv+0x42)[0x560fb47a42ba] sql/item_func.h:585(Item_func_hybrid_field_type::val_str(String*))[0x560fb44b5983] sql/item.cc:5281(Item_copy_string::copy())[0x560fb44acb1a] sql/sql_select.cc:24603(copy_fields(TMP_TABLE_PARAM*))[0x560fb44a9564] sql/sql_select.cc:21307(end_send_group(JOIN*, st_join_table*, bool))[0x560fb44a8cf6] sql/sql_select.cc:20143(evaluate_join_record(JOIN*, st_join_table*, int))[0x560fb44a8002] sql/sql_select.cc:19916(sub_select(JOIN*, st_join_table*, bool))[0x560fb447d0f9] sql/sql_select.cc:19454(do_select(JOIN*, Procedure*))[0x560fb447c2f6] sql/sql_select.cc:4172(JOIN::exec_inner())[0x560fb486d7cc] sql/sql_select.cc:3967(JOIN::exec())[0x560fb485f962] sql/item_subselect.cc:791(Item_subselect::exec())[0x560fb4861bfb] sql/item_subselect.cc:1415(Item_singlerow_subselect::val_int())[0x560fb47c4375] sql/item_cmpfunc.cc:916(Arg_comparator::compare_int_signed())[0x560fb47dac5e] sql/item_cmpfunc.h:102(Arg_comparator::compare())[0x560fb47c747f] sql/item_cmpfunc.cc:1795(Item_func_le::val_int())[0x560fb47c636c] sql/item_cmpfunc.cc:1541(Item_in_optimizer::val_int())[0x560fb47c188a] sql/item_cmpfunc.cc:284(Item_func_nop_all::val_int())[0x560fb44a9189] sql/sql_select.cc:20011(evaluate_join_record(JOIN*, st_join_table*, int))[0x560fb44a8cf6] sql/sql_select.cc:19916(sub_select(JOIN*, st_join_table*, bool))[0x560fb44a8002] sql/sql_select.cc:19454(do_select(JOIN*, Procedure*))[0x560fb447d0f9] sql/sql_select.cc:4172(JOIN::exec_inner())[0x560fb447c2f6] sql/sql_select.cc:3967(JOIN::exec())[0x560fb447d926] sql/sql_select.cc:4377(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*))[0x560fb446e378] sql/sql_select.cc:372(handle_select(THD*, LEX*, select_result*, unsigned long))[0x560fb4430ce9] sql/sql_parse.cc:6339(execute_sqlcom_select(THD*, TABLE_LIST*))[0x560fb4427406] sql/sql_parse.cc:3870(mysql_execute_command(THD*))[0x560fb44354e5] sql/sql_parse.cc:7870(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x560fb442113a] sql/sql_parse.cc:1855(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x560fb441fa06] sql/sql_parse.cc:1398(do_command(THD*))[0x560fb45b1f85] sql/sql_connect.cc:1403(do_handle_one_connection(CONNECT*))[0x560fb45b1ce5] sql/sql_connect.cc:1309(handle_one_connection)[0x560fb50056ec] nptl/pthread_create.c:442(start_thread)[0x7fa0e2d43b43] x86_64/clone3.S:83(__clone3)[0x7fa0e2dd5a00]   Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x7fa0c0012ae8): select a from t1 where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1))   Connection ID (thread ID): 4 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=off,mrr_cost_based=off,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=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on   The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains information that should help you find out what is causing the crash. Writing a core file... Working directory at /dev/shm/var_auto_sr36/mysqld.1/data Resource Limits: Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size unlimited unlimited bytes Max resident set unlimited unlimited bytes Max processes 255871 255871 processes Max open files 1024 1024 files Max locked memory 8393273344 8393273344 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 255871 255871 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Core pattern: |/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E   Kernel version: Linux version 5.15.0-41-generic (buildd@lcy02-amd64-065) (gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #44-Ubuntu SMP Wed Jun 22 14:20:53 UTC 2022   ----------SERVER LOG END-------------