# HG changeset patch
# User Steve Borho <steve@borho.org>
# Date 1253031492 18000
# Node ID 812b812ce8cf4eb69d0a4df253b007c0f3ca4d08
# Parent  57d682d7d2da8af2cc7e22168075b7c246ff85e2# Parent  bc6b0fef9495b3944580a6bd26c7adecc87c3f88
Merge with crew-stable

diff --git a/mercurial/windows.py b/mercurial/windows.py
--- a/mercurial/windows.py
+++ b/mercurial/windows.py
@@ -17,7 +17,7 @@
     try:
         return osutil.posixfile(name, mode, buffering)
     except WindowsError, err:
-        raise IOError(err.errno, err.strerror)
+        raise IOError(err.errno, '%s: %s' % (name, err.strerror))
 posixfile.__doc__ = osutil.posixfile.__doc__
 
 class winstdout(object):