Ticket #19640: 19640.diff

wp-includes/link-template.php

@@ -1363 +1363 @@
         $format = str_replace('%link', $link, $format);
 
         $adjacent = $previous ? 'previous' : 'next';
-        echo apply_filters( "{$adjacent}_post_link", $format, $link );
+        echo apply_filters( "{$adjacent}_post_link", $format, $link, $post );
 }
 
 /**