--- a/mercurial/hg.py	Sat Jul 25 02:20:27 2009 +0200
+++ b/mercurial/hg.py	Sat Jul 25 19:04:08 2009 -0500
@@ -138,7 +138,7 @@
             try:
                 uprev = r.lookup(test)
                 break
-            except:
+            except LookupError:
                 continue
         _update(r, uprev)