Fix a usage of the dangerous pattern decref - modify field - incref.
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@ -265,9 +265,10 @@ type_set_bases(PyTypeObject *type, PyObject *value, void *context)
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PyObject* mro;
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PyArg_UnpackTuple(PyList_GET_ITEM(temp, i),
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"", 2, 2, &cls, &mro);
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Py_DECREF(cls->tp_mro);
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Py_INCREF(mro);
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ob = cls->tp_mro;
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cls->tp_mro = mro;
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Py_INCREF(cls->tp_mro);
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Py_DECREF(ob);
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}
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Py_DECREF(temp);
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goto bail;
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