From 068d5724d82e065fc636814e332078edd7cb30fe Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Tue, 20 Apr 1999 12:27:31 +0000
Subject: Calling _cleanup() does not guarantee that all processes have
 terminated; this makes the final assert in the self-test code fail if the
 parent runs faster than the children.  Fix this by calling wait() on the
 remaining children instead.

---
 Lib/popen2.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/popen2.py b/Lib/popen2.py
index 4c42958..d4b5d26 100644
--- a/Lib/popen2.py
+++ b/Lib/popen2.py
@@ -91,7 +91,8 @@ def _test():
     w.close()
     assert r.read() == teststr
     assert e.read() == ""
-    _cleanup()
+    for inst in _active[:]:
+        inst.wait()
     assert not _active
     print "All OK"
 
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