[wp-trac] [WordPress Trac] #28099: Empty array passed to WP_Query post__in returns posts

[WordPress Trac]

#28099: Empty array passed to WP_Query post__in returns posts
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 Reporter:  danielbachhuber  |       Owner:  wonderboymusic
     Type:  defect (bug)     |      Status:  reopened
 Priority:  normal           |   Milestone:  4.0
Component:  Query            |     Version:
 Severity:  normal           |  Resolution:
 Keywords:  has-patch        |     Focuses:
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Comment (by kovshenin):

 I think Jetpack's infinite scroll breakage is related to this. See:
 https://github.com/Automattic/jetpack/issues/685

 Infinite scroll is trying to build off of the original query so it's using
 the `$wp_the_query->query_vars` array, where `post__in` is set to an empty
 array by `fill_query_vars()`. Jetpack is assuming that the results in
 `$wp_the_query` were retrieved using `$wp_the_query->query_vars` which I
 think is a fair assumption, even though Jetpack could probably build the
 query off of `$wp_the_query->query` instead.

 My vote is to revert this.

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Ticket URL: <https://core.trac.wordpress.org/ticket/28099#comment:16>
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