[issue38609] Trashcan mechanism segfault during interpreter finalization in Python 3.7.5

[ysnt27]

ysnt27 <yoshint2012 at gmail.com> added the comment:

Thanks for making the issue clear.

My understanding is that,
all C++ destructors have to check Python interpreter before Py_DECREF,
like this.

``` cplusplus
  ~something() {
    // PyThreadState *_tstate = PyThreadState_GET();
    PyThreadState *_tstate = _PyThreadState_UncheckedGet();
    if (_tstate) {
      Py_DECREF(somelist);
    }
  }
```

Is this right?

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38609>
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