diff -r ca6ba6cac6cd -r 1b45468d3deb mercurial/util.py
--- a/mercurial/util.py	Mon Mar 29 16:44:24 2010 -0500
+++ b/mercurial/util.py	Mon Mar 15 14:53:34 2010 -0500
@@ -1253,7 +1253,7 @@
             pass
     try:
         import termios, array, fcntl
-        for dev in (sys.stdout, sys.stdin):
+        for dev in (sys.stderr, sys.stdout, sys.stdin):
             try:
                 try:
                     fd = dev.fileno()