Merged revisions 76538,76559,76882-76883,76886,76891-76892,76920,76924-76925,77081,77084,77086,77092 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r76538 | georg.brandl | 2009-11-26 21:48:25 +0100 (Do, 26 Nov 2009) | 1 line

  #7400: typo.
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  r76559 | georg.brandl | 2009-11-28 12:11:50 +0100 (Sa, 28 Nov 2009) | 1 line

  Fix versions and spacing.
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  r76882 | georg.brandl | 2009-12-19 18:30:28 +0100 (Sa, 19 Dez 2009) | 1 line

  #7527: use standard versionadded tags.
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  r76883 | georg.brandl | 2009-12-19 18:34:32 +0100 (Sa, 19 Dez 2009) | 1 line

  #7521: remove Py_GetBuildNumber(), which was removed in favor of Py_GetBuildInfo().
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  r76886 | georg.brandl | 2009-12-19 18:43:33 +0100 (Sa, 19 Dez 2009) | 1 line

  #7493: review of Design FAQ by Florent Xicluna.
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  r76891 | georg.brandl | 2009-12-19 19:16:31 +0100 (Sa, 19 Dez 2009) | 1 line

  #7479: add note about function availability on Unices.
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  r76892 | georg.brandl | 2009-12-19 19:20:18 +0100 (Sa, 19 Dez 2009) | 1 line

  #7480: remove tautology.
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  r76920 | georg.brandl | 2009-12-20 15:20:16 +0100 (So, 20 Dez 2009) | 1 line

  #7495: backport Programming FAQ review to trunk.
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  r76924 | georg.brandl | 2009-12-20 15:28:05 +0100 (So, 20 Dez 2009) | 1 line

  Small indentation fix.
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  r76925 | georg.brandl | 2009-12-20 15:33:20 +0100 (So, 20 Dez 2009) | 1 line

  #7381: subprocess documentation and library docstring consistency fixes.
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  r77081 | georg.brandl | 2009-12-28 08:59:05 +0100 (Mo, 28 Dez 2009) | 1 line

  #7577: fix signature of PyBuffer_FillInfo().
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  r77084 | georg.brandl | 2009-12-28 09:01:59 +0100 (Mo, 28 Dez 2009) | 1 line

  #7586: fix typo.
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  r77086 | georg.brandl | 2009-12-28 09:09:32 +0100 (Mo, 28 Dez 2009) | 1 line

  #7381: consistency update, and backport avoiding ``None >= 0`` check from py3k.
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  r77092 | georg.brandl | 2009-12-28 09:48:24 +0100 (Mo, 28 Dez 2009) | 1 line

  #7404: remove reference to non-existing example files.
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diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index 4964307..fce62bb 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -447,7 +447,8 @@
 
 def _cleanup():
     for inst in _active[:]:
-        if inst._internal_poll(_deadstate=sys.maxint) >= 0:
+        res = inst._internal_poll(_deadstate=sys.maxint)
+        if res is not None and res >= 0:
             try:
                 _active.remove(inst)
             except ValueError: