hgext/histedit.py

--- a/hgext/histedit.py	Wed Aug 27 12:30:28 2014 +0200
+++ b/hgext/histedit.py	Tue Aug 26 22:03:32 2014 +0200
@@ -283,7 +283,7 @@
                                       isexec='x' in flags,
                                       copied=copied.get(path))
             return mctx
-        raise IOError()
+        return None
 
     if commitopts.get('message'):
         message = commitopts['message']