Execution of

CREATE TABLE t1 (a INT AS (a)) ENGINE=InnoDB;

expectedly fails, in 10.2+ with

ERROR 4029 (01000): Expression for field `a` is refering to uninitialized field `a`

and no table is created.
However, an error is written to the error log

2019-01-17  2:01:21 140595305703168 [ERROR] mysqld: Incorrect information in file: './test/t1.frm'

The error is unnecessary alarming, as it suggests database corruption.

I don't suppose there should be any error in the log at all, since no harm is done, it's just a regular failed attempt to create a table. But if we do want to write in in the error log on whatever reason, let it be the same ER_EXPRESSION_REFERS_TO_UNINIT_FIELD as returned to the user.