[issue23571] Raise SystemError if a function returns a result with an exception set

[Roundup Robot]

Roundup Robot added the comment:

New changeset 970f33dff5ca by Victor Stinner in branch 'default':
Issue #23571: Fix test_capi
https://hg.python.org/cpython/rev/970f33dff5ca

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<http://bugs.python.org/issue23571>
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