Ticket #46828: 46828.patch

src/wp-includes/rewrite.php

@@ -376 +376 @@
         $compare = '';
         if ( 0 === $postname_index && ( isset( $query_vars['year'] ) || isset( $query_vars['monthnum'] ) ) ) {
                 $compare = 'year';
-        } elseif ( '%year%' === $permastructs[ $postname_index - 1 ] && ( isset( $query_vars['monthnum'] ) || isset( $query_vars['day'] ) ) ) {
+        } elseif ( ! empty( $postname_index ) && '%year%' === $permastructs[ $postname_index - 1 ] && ( isset( $query_vars['monthnum'] ) || isset( $query_vars['day'] ) ) ) {
                 $compare = 'monthnum';
-        } elseif ( '%monthnum%' === $permastructs[ $postname_index - 1 ] && isset( $query_vars['day'] ) ) {
+        } elseif ( ! empty( $postname_index ) && '%monthnum%' === $permastructs[ $postname_index - 1 ] && isset( $query_vars['day'] ) ) {
                 $compare = 'day';
         }