Assertion `!table || !table->read_set || bitmap_is_set(table->read_set, field_index)' failed in Field_enum::val_int upon INSERT .. SELECT into table with index on virtual column

CREATE TABLE t1 ( 

  pk INT AUTO_INCREMENT,

  f1 ENUM('','a','b'),

  f2 ENUM('','a','b') AS (f1) VIRTUAL,

  PRIMARY KEY(pk),

  UNIQUE(f2,pk)

) ENGINE=MyISAM;

INSERT INTO t1 (f1) VALUES ('');

ALTER TABLE t1 DROP PRIMARY KEY;

INSERT IGNORE INTO t1 SELECT * FROM t1;

# Cleanup

DROP TABLE t1;

mysqld: /data/src/10.4/sql/field.cc:8998: virtual longlong Field_enum::val_int(): Assertion `!table || !table->read_set || bitmap_is_set(table->read_set, field_index)' failed.

181003  0:08:18 [ERROR] mysqld got signal 6 ;

#7  0x00007fe109febee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x000055bb83d523ae in Field_enum::val_int (this=0x7fe0f40423b8) at /data/src/10.4/sql/field.cc:8998

#9  0x000055bb83d5f26f in Field_enum::store_field (this=0x7fe0f40424b0, from=0x7fe0f40423b8) at /data/src/10.4/sql/field.h:4100

#10 0x000055bb83d63a3a in field_conv_incompatible (to=0x7fe0f40424b0, from=0x7fe0f40423b8) at /data/src/10.4/sql/field_conv.cc:836

#11 0x000055bb83d63a96 in field_conv (to=0x7fe0f40424b0, from=0x7fe0f40423b8) at /data/src/10.4/sql/field_conv.cc:849

#12 0x000055bb83d96dfb in save_field_in_field (from=0x7fe0f40423b8, null_value=0x7fe0f400db0e, to=0x7fe0f40424b0, no_conversions=false) at /data/src/10.4/sql/item.cc:6447

#13 0x000055bb83d9703c in Item_field::save_in_field (this=0x7fe0f400da98, to=0x7fe0f40424b0, no_conversions=false) at /data/src/10.4/sql/item.cc:6498

#14 0x000055bb83b9395c in TABLE::update_virtual_fields (this=0x7fe0f4138960, h=0x7fe0f413e8c8, update_mode=VCOL_UPDATE_FOR_WRITE) at /data/src/10.4/sql/table.cc:7775

#15 0x000055bb839ed4da in fill_record (thd=0x7fe0f4000b00, table=0x7fe0f4138960, ptr=0x7fe0f40422d8, values=..., ignore_errors=true, use_value=false) at /data/src/10.4/sql/sql_base.cc:8500

#16 0x000055bb839ed615 in fill_record_n_invoke_before_triggers (thd=0x7fe0f4000b00, table=0x7fe0f4138960, ptr=0x7fe0f40422b8, values=..., ignore_errors=true, event=TRG_EVENT_INSERT) at /data/src/10.4/sql/sql_base.cc:8543

#17 0x000055bb83a38914 in select_insert::store_values (this=0x7fe0f40169f0, values=...) at /data/src/10.4/sql/sql_insert.cc:3889

#18 0x000055bb83a38599 in select_insert::send_data (this=0x7fe0f40169f0, values=...) at /data/src/10.4/sql/sql_insert.cc:3820

#19 0x000055bb83aeb054 in end_send (join=0x7fe0f4016aa0, join_tab=0x0, end_of_records=false) at /data/src/10.4/sql/sql_select.cc:20453

#20 0x000055bb83ae73d9 in do_select (join=0x7fe0f4016aa0, procedure=0x0) at /data/src/10.4/sql/sql_select.cc:18770

#21 0x000055bb83ac03b7 in JOIN::exec_inner (this=0x7fe0f4016aa0) at /data/src/10.4/sql/sql_select.cc:4089

#22 0x000055bb83abf828 in JOIN::exec (this=0x7fe0f4016aa0) at /data/src/10.4/sql/sql_select.cc:3883

#23 0x000055bb83ac0ab7 in mysql_select (thd=0x7fe0f4000b00, tables=0x7fe0f4015b68, wild_num=1, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=3489925888, result=0x7fe0f40169f0, unit=0x7fe0f40049b0, select_lex=0x7fe0f40155e0) at /data/src/10.4/sql/sql_select.cc:4288

#24 0x000055bb83ab23a6 in handle_select (thd=0x7fe0f4000b00, lex=0x7fe0f40048e8, result=0x7fe0f40169f0, setup_tables_done_option=1073741824) at /data/src/10.4/sql/sql_select.cc:382

#25 0x000055bb83a76579 in mysql_execute_command (thd=0x7fe0f4000b00) at /data/src/10.4/sql/sql_parse.cc:4837

#26 0x000055bb83a80905 in mysql_parse (thd=0x7fe0f4000b00, rawbuf=0x7fe0f4014e98 "INSERT IGNORE INTO t1 SELECT * FROM t1", length=38, parser_state=0x7fe1041925f0, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:8085

#27 0x000055bb83a6dd00 in dispatch_command (command=COM_QUERY, thd=0x7fe0f4000b00, packet=0x7fe0f411d4d1 "INSERT IGNORE INTO t1 SELECT * FROM t1", packet_length=38, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:1850

#28 0x000055bb83a6c724 in do_command (thd=0x7fe0f4000b00) at /data/src/10.4/sql/sql_parse.cc:1395

#29 0x000055bb83bd50a5 in do_handle_one_connection (connect=0x55bb87c23750) at /data/src/10.4/sql/sql_connect.cc:1402

#30 0x000055bb83bd4e29 in handle_one_connection (arg=0x55bb87c23750) at /data/src/10.4/sql/sql_connect.cc:1308

#31 0x000055bb84076f4d in pfs_spawn_thread (arg=0x55bb87cb8fb0) at /data/src/10.4/storage/perfschema/pfs.cc:1862

#32 0x00007fe10bcc2494 in start_thread (arg=0x7fe104193700) at pthread_create.c:333

#33 0x00007fe10a0a893f in clone () from /lib/x86_64-linux-gnu/libc.so.6