--- a/src/org/tmatesoft/hg/internal/IntMap.java	Tue Feb 19 21:35:09 2013 +0100
+++ b/src/org/tmatesoft/hg/internal/IntMap.java	Wed Feb 20 18:19:52 2013 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2012 TMate Software Ltd
+ * Copyright (c) 2011-2013 TMate Software Ltd
  *  
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,6 +16,7 @@
  */
 package org.tmatesoft.hg.internal;
 
+import java.util.Arrays;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -127,6 +128,11 @@
 		}
 	}
 	
+	public void clear() {
+		Arrays.fill(values, 0, size, null); // do not keep the references
+		size = 0;
+	}
+	
 	/**
 	 * Forget first N entries (in natural order) in the map.
 	 */