diff --git a/features/gc.xml b/features/gc.xml
index 0fadca4ab2..d14502a64e 100644
--- a/features/gc.xml
+++ b/features/gc.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 3f93d2472fd7840299461246008b64982ebba5f1 Maintainer: mowangjuanzi Status: ready -->
+<!-- EN-Revision: 9957fc259b7b920269ead2a0180969db5bf13433 Maintainer: mowangjuanzi Status: ready -->
+<!-- CREDITS: Luffy -->
  <chapter xml:id="features.gc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
   <title>垃圾回收</title>
 
@@ -370,6 +371,7 @@ a: (refcount=2, is_ref=1)=array (
 class Foo
 {
     public $var = '3.14159265359';
+    public $self;
 }
 
 $baseMemory = memory_get_usage();
@@ -413,6 +415,7 @@ for ( $i = 0; $i <= 100000; $i++ )
 class Foo
 {
     public $var = '3.14159265359';
+    public $self;
 }
 
 for ( $i = 0; $i <= 1000000; $i++ )