--- a/mercurial/context.py	Wed Oct 11 23:31:05 2006 +0200
+++ b/mercurial/context.py	Wed Oct 11 17:37:48 2006 -0500
@@ -367,7 +367,8 @@
                 man.set(f, util.is_exec(self._repo.wjoin(f), man.execf(f)))
 
         for f in deleted + removed:
-            del man[f]
+            if f in man:
+                del man[f]
 
         self._manifest = man