[wp-trac] [WordPress Trac] #43201: PHP Warning: count(): Parameter must be an array or an object that implements Countable in /wp-includes/media.php on line 1206

[WordPress Trac]

#43201: PHP Warning:  count(): Parameter must be an array or an object that
implements Countable in /wp-includes/media.php on line 1206
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 Reporter:  codegrau                    |       Owner:
     Type:  defect (bug)                |      Status:  new
 Priority:  normal                      |   Milestone:  4.9.4
Component:  Media                       |     Version:  4.9.2
 Severity:  normal                      |  Resolution:
 Keywords:  needs-patch good-first-bug  |     Focuses:
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Changes (by SergeyBiryukov):

 * keywords:   => needs-patch good-first-bug
 * component:  General => Media
 * milestone:  Awaiting Review => 4.9.4


Comment:

 Hi @codegrau, welcome to WordPress Trac! Thanks for the report.

 This sound like a plugin incorrectly using the `wp_calculate_image_srcset`
 filter and returning a non-array. That said, we should make sure
 `$sources` is an array before calling `count()`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/43201#comment:1>
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