Version: '10.6.3-MariaDB'  MariaDB Server

Thread 14 "mysqld" received signal SIGSEGV, Segmentation fault.

(gdb) bt

#0  in Item_subselect::init_expr_cache_tracker at ./sql/item_subselect.cc:7003

#1  in Item_singlerow_subselect::expr_cache_insert_transformer at ./sql/item_subselect.cc:1389

#2  in JOIN::setup_subquery_caches at ./sql/sql_select.cc:4225

#3  in JOIN::optimize_stage2 at ./sql/sql_select.cc:3065

#4  in JOIN::optimize_inner at ./sql/sql_select.cc:2477

#5  in JOIN::optimize at ./sql/sql_select.cc:1807

#6  in st_select_lex::optimize_unflattened_subqueries at ./sql/sql_lex.cc:4937

#7  in JOIN::optimize_constant_subqueries at ./sql/opt_subselect.cc:5601

#8  in JOIN::optimize_inner at ./sql/sql_select.cc:2127

#9  in JOIN::optimize at ./sql/sql_select.cc:1807

#10 in mysql_select at ./sql/sql_select.cc:4968

#11 in handle_select at ./sql/sql_select.cc:556

#12 in execute_sqlcom_select at ./sql/sql_parse.cc:6252

#13 in mysql_execute_command at ./sql/sql_parse.cc:3947

#14 in mysql_parse at ./sql/sql_parse.cc:8026

#15 in dispatch_command  at ./sql/sql_parse.cc:1896

#16 in do_command at ./sql/sql_parse.cc:1405

#17 in do_handle_one_connection at ./sql/sql_connect.cc:1410

#18 in handle_one_connection at ./sql/sql_connect.cc:1312

#19 in pfs_spawn_thread at ./storage/perfschema/pfs.cc:2201

#20 in start_thread at pthread_create.c:481

#21 in clone 

drop table if exists t;

create table t(a int);

select 1 from t where not exists 

( 

  select 1 from t where binary current_time()

  group by (select a),(select 1)

);