Bail from `get_term()` if a filter returns an object that is not a `WP_Term`.

This prevents fatal errors in certain cases.

Props tmuikku.
Fixes #35808.
Built from https://develop.svn.wordpress.org/trunk@36516


git-svn-id: http://core.svn.wordpress.org/trunk@36483 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -857,6 +857,11 @@ function get_term( $term, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) {
 	 */
 	$_term = apply_filters( "get_$taxonomy", $_term, $taxonomy );
 
+	// Bail if a filter callback has changed the type of the `$_term` object.
+	if ( ! ( $_term instanceof WP_Term ) ) {
+		return $_term;
+	}
+
 	// Sanitize term, according to the specified filter.
 	$_term->filter( $filter );
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36515';
+$wp_version = '4.5-alpha-36516';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.