From 13cf38c0cf86c2a8e5585d214d0b7fc85119bd7f Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Thu, 20 Jul 2006 16:28:39 +0000
Subject: Guard for _active being None in __del__ method.

---
 Lib/subprocess.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index afa92a5..5438f15 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -618,7 +618,7 @@ class Popen(object):
             return
         # In case the child hasn't been waited on, check if it's done.
         self.poll(_deadstate=sys.maxint)
-        if self.returncode is None:
+        if self.returncode is None and _active is not None:
             # Child is still running, keep us alive until we can wait on it.
             _active.append(self)
 
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