Ticket #39725: 39725.diff

src/wp-includes/capabilities.php

@@ -58 +58 @@
                 break;
         case 'delete_post':
         case 'delete_page':
-                $post = get_post( $args[0] );
+                if ( isset( $args[0] ) ) {
+                $post = get_post( $args[0] );
+                        } else {
+                $post = null;
+                }
+
                 if ( ! $post ) {
                         $caps[] = 'do_not_allow';
                         break;