# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 1325277119 21600
# Node ID 6eb5bbaa1e7371b77601a39bf890a37b1b494536
# Parent  4bf553038b82fca9bbb8e6fdb6874507c44b3c58
fetch: patch cornercase in children calculation (issue2773)

diff -r 4bf553038b82 -r 6eb5bbaa1e73 hgext/fetch.py
--- a/hgext/fetch.py	Thu Dec 29 14:44:30 2011 -0600
+++ b/hgext/fetch.py	Fri Dec 30 14:31:59 2011 -0600
@@ -83,7 +83,7 @@
         # Is this a simple fast-forward along the current branch?
         newheads = repo.branchheads(branch)
         newchildren = repo.changelog.nodesbetween([parent], newheads)[2]
-        if len(newheads) == 1:
+        if len(newheads) == 1 and len(newchildren):
             if newchildren[0] != parent:
                 return hg.clean(repo, newchildren[0])
             else: