[wp-trac] [WordPress Trac] #19814: add_theme_support() inside init hook function breaks post attachments

[WordPress Trac]

#19814: add_theme_support() inside init hook function breaks post attachments
---------------------------+------------------------------
 Reporter:  jamesmehorter  |       Owner:  James Mehorter
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  Media          |     Version:  3.3.1
 Severity:  normal         |  Resolution:
 Keywords:  needs-patch    |
---------------------------+------------------------------

Comment (by SergeyBiryukov):

 Calling `add_theme_support( 'post-thumbnails' )` on `init` action and
 trying to upload an image on the Edit Post screen results in the error:
 {{{
 Fatal error: Call to undefined function get_post_thumbnail_id() in wp-
 admin/includes/media.php on line 1169
 }}}

 The reason is that `post-thumbnail-template.php` is required before
 `init`:
 http://core.trac.wordpress.org/browser/tags/3.3.1/wp-settings.php#L291

 So `init` is too late to call `add_theme_support( 'post-thumbnails' )`.
 That said, both uploading and attaching images to posts seem to work in
 current trunk (in spite of the error).

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Ticket URL: <http://core.trac.wordpress.org/ticket/19814#comment:1>
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