# HG changeset patch
# User Benoit Boissinot <benoit.boissinot@ens-lyon.org>
# Date 1162296203 -3600
# Node ID 9bfb3c049b2aaa85c013262db3907179902b7560
# Parent  fffc8a733bf9fa237bb757aa9dfabd33bf4bd9ed# Parent  c2f82db92ae15e7927d8ca3c179996cd50c01a9b
merge with backout

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -914,8 +914,9 @@ def clone(ui, source, dest=None, **opts)
     See pull for valid source format details.
 
     It is possible to specify an ssh:// URL as the destination, but no
-    .hg/hgrc will be created on the remote side. Look at the help text
-    for the pull command for important details about ssh:// URLs.
+    .hg/hgrc and working directory will be created on the remote side.
+    Look at the help text for the pull command for important details
+    about ssh:// URLs.
     """
     setremoteconfig(ui, opts)
     hg.clone(ui, ui.expandpath(source), dest,
diff --git a/mercurial/merge.py b/mercurial/merge.py
--- a/mercurial/merge.py
+++ b/mercurial/merge.py
@@ -388,7 +388,7 @@ def update(repo, node, branchmerge, forc
         raise util.Abort(_("update spans branches, use 'hg merge' "
                            "or 'hg update -C' to lose changes"))
     if branchmerge and not forcemerge:
-        if wc.modified() or wc.added() or wc.removed():
+        if wc.files():
             raise util.Abort(_("outstanding uncommitted changes"))
 
     ### calculate phase
diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -467,7 +467,7 @@ class revlog(object):
     def tip(self): return self.node(len(self.index) - 1)
     def count(self): return len(self.index)
     def node(self, rev):
-        return (rev < 0) and nullid or self.index[rev][-1]
+        return rev == nullrev and nullid or self.index[rev][-1]
     def rev(self, node):
         try:
             return self.nodemap[node]
@@ -490,8 +490,8 @@ class revlog(object):
             return (self.rev(d[0]), self.rev(d[1]))
         return d
     def start(self, rev):
-        if rev < 0:
-            return nullrev
+        if rev == nullrev:
+            return 0
         if self.version != REVLOGV0:
             return self.ngoffset(self.index[rev][0])
         return self.index[rev][0]
@@ -500,6 +500,8 @@ class revlog(object):
 
     def size(self, rev):
         """return the length of the uncompressed text for a given revision"""
+        if rev == nullrev:
+            return 0
         l = -1
         if self.version != REVLOGV0:
             l = self.index[rev][2]
@@ -530,11 +532,15 @@ class revlog(object):
         """
 
     def length(self, rev):
-        if rev < 0:
+        if rev == nullrev:
             return 0
         else:
             return self.index[rev][1]
-    def base(self, rev): return (rev < 0) and rev or self.index[rev][-5]
+    def base(self, rev):
+        if (rev == nullrev):
+            return nullrev
+        else:
+            return self.index[rev][-5]
 
     def reachable(self, rev, stop=None):
         reachable = {}