[issue17206] Py_XDECREF() expands its argument multiple times

[Mark Shannon]

Change by Mark Shannon <mark at hotpy.org>:


----------
pull_requests: +29209
pull_request: https://github.com/python/cpython/pull/30855

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue17206>
_______________________________________