[wp-trac] [WordPress Trac] #56992: The Loop displays incorrect data for queries started with `fields => 'id=>parent'`.

[WordPress Trac]

#56992: The Loop displays incorrect data for queries started with `fields =>
'id=>parent'`.
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 Reporter:  peterwilsoncc                        |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  6.8
Component:  Query                                |     Version:  3.1
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch has-unit-tests dev-        |     Focuses:
  feedback 2nd-opinion                           |
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Comment (by peterwilsoncc):

 I've [https://github.com/WordPress/wordpress-develop/pull/8418 created an
 alternative pull request] to address the concerns @SirLouen raises.

 * the return value of `WP_Query::next_post()` is unchanged
 * Incomplete data in the loop is addressed within `WP_Query::the_post()`
 * Includes the follow up to [54771] that was assigned to be worked on for
 this ticket

 What changes:

 * Secondary loops ensure the global post is fully populated, allowing
 `get_the_title()`, `get_the_content(), `get_post()`, etc, etc to work as
 documented when called without a parameter.
 * The post and author cache is correctly primed when starting the loop for
 `parent=>id` queries


 I've written up unit tests for the changes and pushed them prior to the
 source changes to demonstrate the issue I was seeing when in the loop.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56992#comment:17>
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