[wp-trac] [WordPress Trac] #39428: Die fast in get_posts if get_user_by returns false

[WordPress Trac]

#39428: Die fast in get_posts if get_user_by returns false
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 Reporter:  david.binda   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Query         |    Version:  4.7
 Severity:  normal        |   Keywords:
  Focuses:                |
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 In case a username in the URL or passed to WP_Query via any other way is
 invalid - such a user is not in database - the code currently casts the
 `false` value returned from `get_user_by` to 0 via `absint` - see
 https://core.trac.wordpress.org/browser/trunk/src/wp-includes/class-wp-
 query.php#L2126

 Instead of trying to query unassigned posts (with `post_author` equal to
 `0`) for all invalid usernames, the query should die fast and return no
 posts.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39428>
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