[wp-trac] [WordPress Trac] #39592: Recent posts widget doesn't filter post types properly

[WordPress Trac]

#39592: Recent posts widget doesn't filter post types properly
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 Reporter:  noccy         |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Widgets       |    Version:  4.7.1
 Severity:  normal        |   Keywords:
  Focuses:                |
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 When browsing by a tag f.ex. `/tag/books/`the Recent Posts widget is
 showing some really weird items alongside the actual posts. On my personal
 site, one is called ''Home'' but with a link for `/2016/12/30/home-2`
 (which is broken), and the next few are simply named ''752'', ''751'' and
 ''750'', again leading to `/2016/12/30/75x` (which are all broken).
 Looking in the database, these are not posts but rather have post_type
 `nav_menu_item`:

 {{{
 mysql> SELECT ID,post_date,post_type,post_name FROM blog_posts WHERE
 post_name='home-2' \G
 *************************** 1. row ***************************
 ID: 761
 post_date: 2016-12-30 17:36:22
 post_type: nav_menu_item
 post_name: home-2
 1 row in set (0.00 sec)
 }}}

 ''(I'm only showing one record here, but they all have the same post
 type)''

 I posted this on the wordpress.com support forums, but without getting an
 answer. So I went on to try and edit the source for the recent posts
 widget in order to apply an explicit filter, but this didn't fix the
 problem either.

 I have also tried using other recent posts widget plugins, but they all
 suffer the same problem. So while this likely has to do with the internals
 of WP_Query and the filtering code, I'm submitting this under component
 ''Widgets'' as it is only the widgets that seem to break.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39592>
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