diff -r 0c4a6ad6efc1 -r 32e8f64b25b0 mercurial/commands.py
--- a/mercurial/commands.py	Tue Aug 16 21:33:50 2005 -0800
+++ b/mercurial/commands.py	Tue Aug 16 22:47:49 2005 -0800
@@ -791,6 +791,8 @@
                 + " repositories yet, sorry!\n")
         return 1
     o = repo.findincoming(other)
+    if not o:
+        return
     o = other.newer(o)
     o.reverse()
     for n in o: