SELECT from table with indexed virtual column and certain charset causes Assertion `templ->mbmaxlen > templ->mbminlen || templ->mysql_col_len == len || (field_no == templ->icp_rec_field_no && field->prefix_len > 0)' failure

--source include/have_innodb.inc

CREATE TABLE t1 (pk INT, i INT, a CHAR(8), va CHAR(8) AS (a) VIRTUAL, PRIMARY KEY(pk), KEY(va(4),i)) ENGINE=InnoDB CHARACTER SET macce;

INSERT INTO t1 (pk,a) VALUES (1,'foo'),(2,'bar');

SELECT i FROM t1;

# Cleanup

DROP TABLE t1;

mysqld: /data/src/10.2/storage/innobase/row/row0sel.cc:2914: void row_sel_field_store_in_mysql_format_func(byte*, const mysql_row_templ_t*, const dict_index_t*, ulint, const byte*, ulint): Assertion `templ->mbmaxlen > templ->mbminlen || templ->mysql_col_len == len || (field_no == templ->icp_rec_field_no && field->prefix_len > 0)' failed.

210128 18:01:03 [ERROR] mysqld got signal 6 ;

#7  0x00007fdc509e6f36 in __GI___assert_fail (assertion=0x564e91a2e198 "templ->mbmaxlen > templ->mbminlen || templ->mysql_col_len == len || (field_no == templ->icp_rec_field_no && field->prefix_len > 0)", file=0x564e91a2d250 "/data/src/10.2/storage/innobase/row/row0sel.cc", line=2914, function=0x564e91a2e070 "void row_sel_field_store_in_mysql_format_func(byte*, const mysql_row_templ_t*, const dict_index_t*, ulint, const byte*, ulint)") at assert.c:101

#8  0x0000564e91413c39 in row_sel_field_store_in_mysql_format_func (dest=0x7fdbf8035331 "bar     ", '\245' <repeats 39 times>, "\210S\003\370\333\177", templ=0x7fdbf8148230, index=0x7fdbf80366e0, field_no=0, data=0x7fdc4b62008c "bar \200", len=4) at /data/src/10.2/storage/innobase/row/row0sel.cc:2914

#9  0x0000564e91414860 in row_sel_store_mysql_rec (mysql_rec=0x7fdbf8035320 "\377\002", prebuilt=0x7fdbf8038490, rec=0x7fdc4b61c09d "\200", vrow=0x7fdbf8008110, rec_clust=true, index=0x7fdbf80366e0, offsets=0x7fdc4ae4b7c0) at /data/src/10.2/storage/innobase/row/row0sel.cc:3217

#10 0x0000564e91419ed9 in row_search_mvcc (buf=0x7fdbf8035320 "\377\002", mode=PAGE_CUR_G, prebuilt=0x7fdbf8038490, match_mode=0, direction=0) at /data/src/10.2/storage/innobase/row/row0sel.cc:5623

#11 0x0000564e912a664f in ha_innobase::index_read (this=0x7fdbf80ab288, buf=0x7fdbf8035320 "\377\002", key_ptr=0x0, key_len=0, find_flag=HA_READ_AFTER_KEY) at /data/src/10.2/storage/innobase/handler/ha_innodb.cc:9392

#12 0x0000564e912a75f4 in ha_innobase::index_first (this=0x7fdbf80ab288, buf=0x7fdbf8035320 "\377\002") at /data/src/10.2/storage/innobase/handler/ha_innodb.cc:9769

#13 0x0000564e9109df61 in handler::ha_index_first (this=0x7fdbf80ab288, buf=0x7fdbf8035320 "\377\002") at /data/src/10.2/sql/handler.cc:2809

#14 0x0000564e90e877a1 in join_read_first (tab=0x7fdbf8014128) at /data/src/10.2/sql/sql_select.cc:19847

#15 0x0000564e90e8516e in sub_select (join=0x7fdbf8012fe0, join_tab=0x7fdbf8014128, end_of_records=false) at /data/src/10.2/sql/sql_select.cc:18855

#16 0x0000564e90e84732 in do_select (join=0x7fdbf8012fe0, procedure=0x0) at /data/src/10.2/sql/sql_select.cc:18402

#17 0x0000564e90e5e3a9 in JOIN::exec_inner (this=0x7fdbf8012fe0) at /data/src/10.2/sql/sql_select.cc:3641

#18 0x0000564e90e5d850 in JOIN::exec (this=0x7fdbf8012fe0) at /data/src/10.2/sql/sql_select.cc:3436

#19 0x0000564e90e5ea12 in mysql_select (thd=0x7fdbf8000d90, tables=0x7fdbf80128d8, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7fdbf8012fc0, unit=0x7fdbf8004988, select_lex=0x7fdbf80050c8) at /data/src/10.2/sql/sql_select.cc:3836

#20 0x0000564e90e52b8c in handle_select (thd=0x7fdbf8000d90, lex=0x7fdbf80048c8, result=0x7fdbf8012fc0, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:361

#21 0x0000564e90e1d296 in execute_sqlcom_select (thd=0x7fdbf8000d90, all_tables=0x7fdbf80128d8) at /data/src/10.2/sql/sql_parse.cc:6248

#22 0x0000564e90e13c45 in mysql_execute_command (thd=0x7fdbf8000d90) at /data/src/10.2/sql/sql_parse.cc:3559

#23 0x0000564e90e2103f in mysql_parse (thd=0x7fdbf8000d90, rawbuf=0x7fdbf80126f8 "SELECT i FROM t1", length=16, parser_state=0x7fdc4ae4d5f0, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7763

#24 0x0000564e90e0f318 in dispatch_command (command=COM_QUERY, thd=0x7fdbf8000d90, packet=0x7fdbf8008b51 "", packet_length=16, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1827

#25 0x0000564e90e0de13 in do_command (thd=0x7fdbf8000d90) at /data/src/10.2/sql/sql_parse.cc:1381

#26 0x0000564e90f6872e in do_handle_one_connection (connect=0x564e93093220) at /data/src/10.2/sql/sql_connect.cc:1336

#27 0x0000564e90f68493 in handle_one_connection (arg=0x564e93093220) at /data/src/10.2/sql/sql_connect.cc:1241

#28 0x0000564e917909fa in pfs_spawn_thread (arg=0x564e930763a0) at /data/src/10.2/storage/perfschema/pfs.cc:1869

#29 0x00007fdc50ef6609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#30 0x00007fdc50ad2293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95