Ticket #23881: 23881.2.diff

wp-includes/option.php

@@ -458 +458 @@
                         $alloptions = wp_load_alloptions();
                         if ( !isset( $alloptions[$transient_option] ) ) {
                                 $transient_timeout = '_transient_timeout_' . $transient;
-                                if ( get_option( $transient_timeout ) < time() ) {
+                                $transient_timeout_value = get_option( $transient_timeout );
+                                if ( false !== $transient_timeout_value && $transient_timeout_value < time() ) {
                                         delete_option( $transient_option  );
                                         delete_option( $transient_timeout );
                                         return false;