Merged revisions 74338 via svnmerge from

Merged revisions 74338 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r74338 | antoine.pitrou | 2009-08-06 22:29:56 +0200 (jeu., 06 août 2009) | 14 lines

  Merged revisions 74336 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r74336 | antoine.pitrou | 2009-08-06 22:18:29 +0200 (jeu., 06 août 2009) | 8 lines

    Issue #6629: Fix a data corruption issue in the new `io` package, which could
    occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
    "wb+" mode) after having buffered a certain amount of data for reading. This
    bug was not present in the pure Python implementation.

    Yes, this is a serious issue.
  ........
................