# HG changeset patch
# User Benoit Boissinot <benoit.boissinot@ens-lyon.org>
# Date 2010-08-19 22:17:50
# Node ID 3195cf01dfb9f6d8a955db4915a3f1515f61004c
# Parent  ff84cd2bdfaf894760d7adb2b58c57c5cc8838f6

revlog.revision(): don't use nullrev as the default value for the cache

I is probably a bug if the deltachain computation think there was a cache hit
at nullrev. Use None instead, this will never trigger a cache hit.

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -1056,7 +1056,7 @@ class revlog(object):
 
     def revision(self, node):
         """return an uncompressed revision of a given node"""
-        cachedrev = nullrev
+        cachedrev = None
         if node == nullid:
             return ""
         if self._cache: