[wp-trac] [WordPress Trac] #25429: `get_the_category_by_ID` triggers PHP notice on non-existent category

[WordPress Trac]

#25429: `get_the_category_by_ID` triggers PHP notice on non-existent category
--------------------------+-----------------------------
 Reporter:  ericmann      |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Taxonomy      |    Version:  3.6.1
 Severity:  normal        |   Keywords:  has-patch
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 When calling `get_the_category_by_ID()` with a bad category ID, the
 function internally triggers a PHP notice.  Internally, the function uses
 `get_term()`, which can return `null`. However, the function only checks
 `is_wp_error()` and not null, leading to the following notice:

   Notice: Trying to get property of non-object in /var/www/wordpress/wp-
 includes/category-template.php on line 141

 This bug was originally reported by TechCrunch.

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Ticket URL: <http://core.trac.wordpress.org/ticket/25429>
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