SELECT from table with vcol index reports warning

diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc

--- a/sql/sql_insert.cc

+++ b/sql/sql_insert.cc

@@ -1132,6 +1132,8 @@

       error= write_record(thd, table, &info, result);

       if (unlikely(error))

         break;

+

+      DEBUG_SYNC(thd, "after_write_record");

       info.accepted_rows++;

     }

     its.rewind();

# Run with --innodb-page-size=4K

--source include/have_debug_sync.inc

--source include/have_innodb.inc

--source include/have_sequence.inc

--connect (con2, localhost, root,,)

--connection default

set default_storage_engine= innodb;

CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);

CREATE TABLE t2(fld1 INT NOT NULL,

                fld2 INT AS (100/fld1) VIRTUAL,

                KEY(fld2),

                FOREIGN KEY(fld1) REFERENCES t1(fld1)

                  ON UPDATE CASCADE);

INSERT INTO t1 SELECT * from seq_1_to_1025; # Fill enough to make a new block

INSERT INTO t2 VALUES(1, DEFAULT), (2, default);

--connection con2

set debug_sync = "after_write_record signal go wait_for finish";

send INSERT INTO t1 VALUES(10000);

--connection default

#--error ER_DIVISION_BY_ZERO

set debug_sync = "now wait_for go";

UPDATE IGNORE t1 SET fld1= 0 WHERE fld1= 2;

SELECT fld2 FROM t2;

set debug_sync = "now signal finish";

DROP TABLE t2, t1;

set debug_sync= reset;

--connection default