# HG changeset patch
# User Thomas Arendsen Hein <thomas@intevation.de>
# Date 1143226265 -3600
# Node ID 4aab906517c6ef8c78b8a2d9eeb681220cb24750
# Parent  a439b7b5153052748d977f39aa19d8035ddd4a9e
Calling revlog.addgroup with an empty changegroup now raises RevlogError.
The empty changegroup can be caused by remote servers dying soon after
findincoming, and further code in pull assumes (correctly) that there are
new changesets.


diff -r a439b7b51530 -r 4aab906517c6 mercurial/revlog.py
--- a/mercurial/revlog.py	Fri Mar 24 10:33:18 2006 -0800
+++ b/mercurial/revlog.py	Fri Mar 24 19:51:05 2006 +0100
@@ -743,7 +743,7 @@
         #track the base of the current delta log
         r = self.count()
         t = r - 1
-        node = nullid
+        node = None
 
         base = prev = -1
         start = end = measure = 0
@@ -816,6 +816,8 @@
 
         dfh.close()
         ifh.close()
+        if node is None:
+            raise RevlogError(_("group to be added is empty"))
         return node
 
     def strip(self, rev, minlink):