[wp-trac] [WordPress Trac] #39932: `get_terms()` with `name` and without `taxonomy` generates warning

[WordPress Trac]

#39932: `get_terms()` with `name` and without `taxonomy` generates warning
--------------------------+-----------------------------
 Reporter:  dlh           |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Taxonomy      |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 On a clean install, calling `get_terms( array( 'name' => array(
 'uncategorized' ) ) )` generates a warning: `reset() expects parameter 1
 to be array, null given in...class-wp-term-query.php on line 481`.

 Earlier in `WP_Term_Query::get_terms()`, the `$taxonomies` variable is set
 to `$args['taxonomy']`, but that argument is `null` by default.

 The attached patch would cast `$args['taxonomy']` to an array before
 assigning it to `$taxonomies`. Casting to an array fixes the warning and
 seems consistent to me with the use of `$taxonomies` throughout the
 method, which tends to assume it's an array.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39932>
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