Ticket #38243: 38243.diff

src/wp-includes/taxonomy.php

@@ -2100 +2100 @@
         }
 
         $args['name'] = $term;
         $args['taxonomy'] = $taxonomy;
 
         // Coerce null description to strings, to avoid database errors.
         $args['description'] = (string) $args['description'];
 
         $args = sanitize_term($args, $taxonomy, 'db');
 
         // expected_slashed ($name)
         $name = wp_unslash( $args['name'] );
         $description = wp_unslash( $args['description'] );
         $parent = (int) $args['parent'];
 
+        if ( '' == trim( $name ) ) {
+                return new WP_Error( 'empty_term_name', __( 'A name is required for this term.' ) );
+        }
+
         $slug_provided = ! empty( $args['slug'] );
         if ( ! $slug_provided ) {
                 $slug = sanitize_title( $name );
         } else {
                 $slug = $args['slug'];
         }
 
         $term_group = 0;
         if ( $args['alias_of'] ) {
                 $alias = get_term_by( 'slug', $args['alias_of'], $taxonomy );
                 if ( ! empty( $alias->term_group ) ) {
                         // The alias we want is already in a group, so let's use that one.
                         $term_group = $alias->term_group;
                 } elseif ( ! empty( $alias->term_id ) ) {
                         /*