Merged revisions 80544 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r80544 | benjamin.peterson | 2010-04-27 16:01:54 -0500 (Tue, 27 Apr 2010) | 1 line

  reject None as the buffering argument like the C implementation does #8546
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diff --git a/Misc/NEWS b/Misc/NEWS
index 2837ef9..ff469e7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -339,6 +339,8 @@
 Library
 -------
 
+- Issue #8546: Reject None given as the buffering argument to _pyio.open.
+
 - Issue #8549: Fix compiling the _ssl extension under AIX.  Patch by
   Sridhar Ratnakumar.