[wp-trac] [WordPress Trac] #21155: Prevent warnings in get_the_category from unregistered "category" taxonomy

[WordPress Trac]

#21155: Prevent warnings in get_the_category from unregistered "category" taxonomy
--------------------------+-----------------------------
 Reporter:  batmoo        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  3.4
 Severity:  normal        |   Keywords:
--------------------------+-----------------------------
 {{{get_the_terms}}} can return a WP_Error object if the category taxonomy
 is not defined (something that sites can do if they want custom
 taxonomies). This results in some warnings from {{{get_the_category}}}
 because it assumes that the category taxonomy will always be there and it
 will always get a valid value back.

 {{{
 Warning: array_values() expects parameter 1 to be array, object given in
 /home/wpcom/public_html/wp-includes/category-template.php on line 79

 Warning: array_keys() expects parameter 1 to be array, null given in
 /home/wpcom/public_html/wp-includes/category-template.php on line 81

 Warning: Invalid argument supplied for foreach() in
 /home/wpcom/public_html/wp-includes/category-template.php on line 81
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/21155>
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