--- a/mercurial/commands.py	Fri Apr 04 22:18:38 2008 +0200
+++ b/mercurial/commands.py	Fri Apr 04 22:41:17 2008 +0200
@@ -1047,6 +1047,9 @@
             self.colstart = colstart
             self.colend = colend
 
+        def __hash__(self):
+            return hash((self.linenum, self.line))
+
         def __eq__(self, other):
             return self.line == other.line