Assertion `0' failed in row_purge_remove_sec_if_poss_leaf on table with virtual columns and indexes

--source include/have_innodb.inc

CREATE TABLE t1 ( 

  pk SERIAL,

  vb TINYBLOB AS (b) VIRTUAL,

  b TINYBLOB,

  y YEAR,

  c CHAR(255),

  PRIMARY KEY(pk),

  INDEX (y,vb(64))

) ENGINE=InnoDB;

INSERT IGNORE INTO t1 (b,y,c) VALUES ('foo',1981,'bar');

SELECT * FROM t1 INTO OUTFILE 'load.data';

LOAD DATA INFILE 'load.data' REPLACE INTO TABLE t1;

# Cleanup

DROP TABLE t1;

--let $datadir= `SELECT @@datadir`

--remove_file $datadir/test/load.data

2018-05-19 21:12:11 3 [ERROR] InnoDB: tried to purge non-delete-marked record in index `y` of table `test`.`t1`: tuple: TUPLE (info_bits=0, 3 fields): {[1]Q(0x01),[3]foo(0x060F0F),[8]        (0x0000000000000001)}, record: COMPACT RECORD(info_bits=0, 3 fields): {[1]Q(0x01),[3]foo(0x060F0F),[8]        (0x0000000000000001)}

mysqld: /data/src/10.3/storage/innobase/row/row0purge.cc:494: bool row_purge_remove_sec_if_poss_leaf(purge_node_t*, dict_index_t*, const dtuple_t*): Assertion `0' failed.

180519 21:12:11 [ERROR] mysqld got signal 6 ;

#7  0x00007f6138286ee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x0000560ed2d7a311 in row_purge_remove_sec_if_poss_leaf (node=0x560ed5884208, index=0x7f60e01269c8, entry=0x7f6100014018) at /data/src/10.3/storage/innobase/row/row0purge.cc:494

#9  0x0000560ed2d7a64d in row_purge_remove_sec_if_poss (node=0x560ed5884208, index=0x7f60e01269c8, entry=0x7f6100014018) at /data/src/10.3/storage/innobase/row/row0purge.cc:584

#10 0x0000560ed2d7a849 in row_purge_del_mark (node=0x560ed5884208) at /data/src/10.3/storage/innobase/row/row0purge.cc:654

#11 0x0000560ed2d7bca9 in row_purge_record_func (node=0x560ed5884208, undo_rec=0x560ed58847b8 "", thr=0x560ed5884038, updated_extern=false) at /data/src/10.3/storage/innobase/row/row0purge.cc:1042

#12 0x0000560ed2d7bfc6 in row_purge (node=0x560ed5884208, undo_rec=0x560ed58847b8 "", thr=0x560ed5884038) at /data/src/10.3/storage/innobase/row/row0purge.cc:1107

#13 0x0000560ed2d7c2c7 in row_purge_step (thr=0x560ed5884038) at /data/src/10.3/storage/innobase/row/row0purge.cc:1186

#14 0x0000560ed2d00c86 in que_thr_step (thr=0x560ed5884038) at /data/src/10.3/storage/innobase/que/que0que.cc:1046

#15 0x0000560ed2d00eb9 in que_run_threads_low (thr=0x560ed5884038) at /data/src/10.3/storage/innobase/que/que0que.cc:1108

#16 0x0000560ed2d010aa in que_run_threads (thr=0x560ed5884038) at /data/src/10.3/storage/innobase/que/que0que.cc:1148

#17 0x0000560ed2dccc45 in srv_task_execute () at /data/src/10.3/storage/innobase/srv/srv0srv.cc:2437

#18 0x0000560ed2dccdea in srv_worker_thread (arg=0x0) at /data/src/10.3/storage/innobase/srv/srv0srv.cc:2485

#19 0x00007f6139f5d494 in start_thread (arg=0x7f611cff9700) at pthread_create.c:333

#20 0x00007f613834393f in clone () from /lib/x86_64-linux-gnu/libc.so.6