warning for subquery that references a table but not its columns

I almost got bit by this today:

=> select email from subscribed where email not in (select email from tracks);
email
-------
(0 rows)

=> select email from subscribed where email not in (select tracks.email from tracks);
ERROR: column tracks.email does not exist
LINE 1: ... email from subscribed where email not in (select tracks.ema...

(the "tracks" table doesn't have an "email" column, so the first query is just meaningless)

Should there be a warning for the first query that you reference "tracks" in a subquery but don't use any columns from it?

--
Seamus Abshere, SCEA
https://www.faraday.io
https://github.com/seamusabshere
https://linkedin.com/in/seamusabshere