Server crashes in dict_table_t::instant_column upon ADD COLUMN

--source include/have_innodb.inc

CREATE TABLE tx (pk INT PRIMARY KEY) ENGINE=InnoDB;

CREATE TABLE t1 (pk INT, a INT, PRIMARY KEY (pk), KEY (a), FOREIGN KEY (a) REFERENCES tx (pk)) ENGINE=InnoDB;

SET FOREIGN_KEY_CHECKS=OFF;

--error ER_FK_COLUMN_CANNOT_DROP

ALTER TABLE t1 DROP a;

SET FOREIGN_KEY_CHECKS=ON;

ALTER TABLE t1 ADD b INT;

--error ER_DROP_INDEX_FK

ALTER TABLE t1 DROP a;

ALTER TABLE t1 ADD c INT;

# Cleanup

DROP TABLE t1, tx;

#2  <signal handler called>

#3  0x000056099d648ce1 in dict_table_t::instant_column (this=<optimized out>, table=..., col_map=<optimized out>) at /data/src/10.4/storage/innobase/handler/handler0alter.cc:694

#4  0x000056099d1207c9 in instant_column (this=0x7f65e8013c08) at /data/src/10.4/storage/innobase/handler/handler0alter.cc:1082

#5  innobase_instant_try (ha_alter_info=ha_alter_info@entry=0x7f6640bd4e10, ctx=ctx@entry=0x7f65e8013c08, trx=trx@entry=0x7f66416a1158, table=<optimized out>, altered_table=<optimized out>, altered_table=<optimized out>) at /data/src/10.4/storage/innobase/handler/handler0alter.cc:5508

#6  0x000056099d64572b in commit_try_norebuild (table_name=0x7f65e8082aad "t1", trx=0x7f66416a1158, old_table=<optimized out>, altered_table=<optimized out>, ctx=0x7f65e8013c08, ha_alter_info=<optimized out>) at /data/src/10.4/storage/innobase/handler/handler0alter.cc:10155

#7  ha_innobase::commit_inplace_alter_table (this=<optimized out>, altered_table=<optimized out>, ha_alter_info=<optimized out>, commit=<optimized out>) at /data/src/10.4/storage/innobase/handler/handler0alter.cc:10824

#8  0x000056099d11b6c2 in mysql_inplace_alter_table (thd=thd@entry=0x7f65e80009a8, table_list=0x7f65e8011f80, table=table@entry=0x7f65e80ccb28, altered_table=altered_table@entry=0x7f65e803f1a8, ha_alter_info=ha_alter_info@entry=0x7f6640bd4e10, inplace_supported=inplace_supported@entry=HA_ALTER_INPLACE_INSTANT, alter_ctx=0x7f6640bd5660, target_mdl_request=0x7f6640bd4eb0) at /data/src/10.4/sql/sql_table.cc:7695

#9  0x000056099d2a6f2b in mysql_alter_table (thd=<optimized out>, new_db=<optimized out>, new_name=<optimized out>, create_info=<optimized out>, table_list=0x7f65e8011f80, alter_info=0x7f6640bd6160, order_num=0, order=0x0, ignore=false) at /data/src/10.4/sql/sql_table.cc:9922

#10 0x000056099d2f515b in Sql_cmd_alter_table::execute (this=0x1fd97a02082, thd=0x7f65e80009a8) at /data/src/10.4/sql/sql_alter.cc:499

#11 0x000056099d20ce56 in mysql_execute_command (thd=thd@entry=0x7f65e80009a8) at /data/src/10.4/sql/sql_parse.cc:6346

#12 0x000056099d214311 in mysql_parse (thd=thd@entry=0x7f65e80009a8, rawbuf=<optimized out>, length=24, parser_state=parser_state@entry=0x7f6640bd91d0, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/src/10.4/sql/sql_parse.cc:8157

#13 0x000056099d216b3f in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x7f65e80009a8, packet=packet@entry=0x7f65e8009b39 "ALTER TABLE t1 ADD c INT", packet_length=packet_length@entry=24, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/src/10.4/sql/sql_parse.cc:1829

#14 0x000056099d217f97 in do_command (thd=0x7f65e80009a8) at /data/src/10.4/sql/sql_parse.cc:1358

#15 0x000056099d2f252c in do_handle_one_connection (connect=connect@entry=0x5609a05dd588) at /data/src/10.4/sql/sql_connect.cc:1399

#16 0x000056099d2f2694 in handle_one_connection (arg=arg@entry=0x5609a05dd588) at /data/src/10.4/sql/sql_connect.cc:1302

#17 0x000056099d60ff44 in pfs_spawn_thread (arg=0x5609a05dd5e8) at /data/src/10.4/storage/perfschema/pfs.cc:1862

#18 0x00007f6649569494 in start_thread (arg=0x7f6640bda700) at pthread_create.c:333

#19 0x00007f664794f93f in clone () from /lib/x86_64-linux-gnu/libc.so.6