Server crashes with indexed by prefix virtual column

--source include/have_partition.inc

CREATE TABLE t1 (pk INT PRIMARY KEY, a INT, b CHAR(20), c CHAR(20) AS (b) VIRTUAL, KEY (c(10),a)) PARTITION BY HASH(pk);

INSERT INTO t1 (pk,a,b) VALUES (1,10,'foo'),(2,11,'baz');

SELECT a FROM t1;

# Cleanup

DROP TABLE t1;

#3  <signal handler called>

#4  0x0000564fa8eb47be in Field::register_field_in_read_map (this=0x7fbafc0a3200) at /data/src/10.2/sql/field.cc:11251

#5  0x0000564fa95e39aa in ha_partition::index_init (this=0x7fbafc0a20e8, inx=1, sorted=true) at /data/src/10.2/sql/ha_partition.cc:5258

#6  0x0000564fa8bc2a79 in handler::ha_index_init (this=0x7fbafc0a20e8, idx=1, sorted=true) at /data/src/10.2/sql/handler.h:2837

#7  0x0000564fa8cb3391 in join_read_first (tab=0x7fbafc014150) at /data/src/10.2/sql/sql_select.cc:19881

#8  0x0000564fa8cb0db0 in sub_select (join=0x7fbafc013008, join_tab=0x7fbafc014150, end_of_records=false) at /data/src/10.2/sql/sql_select.cc:18892

#9  0x0000564fa8cb0374 in do_select (join=0x7fbafc013008, procedure=0x0) at /data/src/10.2/sql/sql_select.cc:18439

#10 0x0000564fa8c89e85 in JOIN::exec_inner (this=0x7fbafc013008) at /data/src/10.2/sql/sql_select.cc:3651

#11 0x0000564fa8c8932c in JOIN::exec (this=0x7fbafc013008) at /data/src/10.2/sql/sql_select.cc:3446

#12 0x0000564fa8c8a506 in mysql_select (thd=0x7fbafc000d90, tables=0x7fbafc0128e8, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7fbafc012fe8, unit=0x7fbafc004988, select_lex=0x7fbafc0050d8) at /data/src/10.2/sql/sql_select.cc:3849

#13 0x0000564fa8c7e65a in handle_select (thd=0x7fbafc000d90, lex=0x7fbafc0048c8, result=0x7fbafc012fe8, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:361

#14 0x0000564fa8c48cc0 in execute_sqlcom_select (thd=0x7fbafc000d90, all_tables=0x7fbafc0128e8) at /data/src/10.2/sql/sql_parse.cc:6271

#15 0x0000564fa8c3f834 in mysql_execute_command (thd=0x7fbafc000d90) at /data/src/10.2/sql/sql_parse.cc:3582

#16 0x0000564fa8c4ca7c in mysql_parse (thd=0x7fbafc000d90, rawbuf=0x7fbafc012708 "SELECT a FROM t1", length=16, parser_state=0x7fbb0e30c560, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7793

#17 0x0000564fa8c3acd7 in dispatch_command (command=COM_QUERY, thd=0x7fbafc000d90, packet=0x7fbafc008b61 "", packet_length=16, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1827

#18 0x0000564fa8c397d2 in do_command (thd=0x7fbafc000d90) at /data/src/10.2/sql/sql_parse.cc:1381

#19 0x0000564fa8d95453 in do_handle_one_connection (connect=0x564fabc34110) at /data/src/10.2/sql/sql_connect.cc:1336

#20 0x0000564fa8d951b8 in handle_one_connection (arg=0x564fabc34110) at /data/src/10.2/sql/sql_connect.cc:1241

#21 0x0000564fa95c18f4 in pfs_spawn_thread (arg=0x564fabc17440) at /data/src/10.2/storage/perfschema/pfs.cc:1869

#22 0x00007fbb14810609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#23 0x00007fbb143eb293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

commit 7d9ba57da4843c05a4d11e63159a961c4eb79a04

Author: Nikita Malyavin

Date:   Mon Jun 21 17:48:45 2021 +0300

    [1/2] MDEV-18166 ASSERT_COLUMN_MARKED_FOR_READ failed on tables with vcols

    This is a 10.2+ part of a jira task