[issue15005] trace corrupts return result on chained execution

[anatoly techtonik]

anatoly techtonik <techtonik at gmail.com> added the comment:

The fix for saving/restoring trace function belong to subprocess module. Python2 only issue will be actual when you have to port Python2 only app where it works ok to the Python3 where it doesn't work even if it executes successfully.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15005>
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