Ticket #29614: 29614.diff

src/wp-includes/taxonomy.php

@@ -2947 +2947 @@
         if ( '' == trim($name) )
                 return new WP_Error('empty_term_name', __('A name is required for this term'));
 
+        if ( $parsed_args['parent'] > 0 && ! term_exists( (int) $parsed_args['parent'] ) ) {
+                return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) );
+        }
+
         $empty_slug = false;
         if ( empty( $args['slug'] ) ) {
                 $empty_slug = true;

tests/phpunit/tests/term.php

@@ -702 +702 @@
                 $cat_id2 = $this->factory->category->create( array( 'parent' => $cat_id1 ) );
                 $this->assertWPError( $cat_id2 );
         }
+
+        /**
+         * @ticket 29614
+         */
+        function test_orphan_category_update() {
+                $cat_id1 = $this->factory->category->create();
+                $cat_id2 = $this->factory->category->create( array( 'parent' => $cat_id1 ) );
+
+                wp_delete_category( $cat_id1 );
+
+                $cat_id2 = wp_update_term( $cat_id2, 'category', array( 'parent' => $cat_id1 ) );
+                $this->assertWPError( $cat_id2 );
+                
+        }
 }