crash in Item::save_in_field with empty enum value

Version: '10.1.11-MariaDB' mariadb.org binary distribution

[ERROR] mysqld got exception 0xc0000005 ;

mysqld.exe!Item::save_in_field()[item.cc:5908]

mysqld.exe!Item::save_in_field_no_warnings()[item.cc:1353]

mysqld.exe!Item_bool_func::get_mm_leaf()[opt_range.cc:7794]

mysqld.exe!Item_bool_func::get_mm_parts()[opt_range.cc:7611]

mysqld.exe!Item_bool_func2_with_rev::get_func_mm_tree()[item_cmpfunc.h:422]

mysqld.exe!Item_bool_func::get_full_func_mm_tree()[opt_range.cc:7311]

mysqld.exe!Item_bool_func::get_full_func_mm_tree_for_args()[item_cmpfunc.h:180]

mysqld.exe!Item_bool_func2_with_rev::get_mm_tree()[item_cmpfunc.h:450]

mysqld.exe!SQL_SELECT::test_quick_select()[opt_range.cc:2540]

mysqld.exe!get_quick_record_count()[sql_select.cc:3490]

mysqld.exe!make_join_statistics()[sql_select.cc:4108]

mysqld.exe!JOIN::optimize_inner()[sql_select.cc:1375]

mysqld.exe!JOIN::optimize()[sql_select.cc:1036]

mysqld.exe!mysql_select()[sql_select.cc:3437]

mysqld.exe!handle_select()[sql_select.cc:384]

mysqld.exe!execute_sqlcom_select()[sql_parse.cc:5903]

mysqld.exe!mysql_execute_command()[sql_parse.cc:2962]

mysqld.exe!mysql_parse()[sql_parse.cc:7308]

mysqld.exe!dispatch_command()[sql_parse.cc:1491]

mysqld.exe!do_command()[sql_parse.cc:1109]

mysqld.exe!threadpool_process_request()[threadpool_common.cc:239]

mysqld.exe!io_completion_callback()[threadpool_win.cc:568]

set sql_mode='';

drop table if exists t;

create table t (a enum('a'),b time,c int,key(b)) engine=innodb;

insert into t values ('','00:00:00',0);

select 1 from t where (select a from t group by c) = b;