[issue34495] excess_args asserts if args == nullptr

[Tatyana]

New submission from Tatyana :

Since version 3.7 PyTuple_GET_SIZE performs assert(PyTuple_Check(args)); Due to 
this change, object_new and object_init cannot be called with args == nullptr.

Such behavior breaks existing user's code, particularly a code generated with 
Swig.

--
components: Library (Lib)
messages: 324041
nosy: tkrasnukha
priority: normal
pull_requests: 8390
severity: normal
status: open
title: excess_args asserts if args == nullptr
type: crash
versions: Python 3.7, Python 3.8

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[issue34495] excess_args asserts if args == nullptr

[Tatyana]

Tatyana  added the comment:

So, user has to do

PyObject *empty_args = PyTuple_New(0);
inst = PyBaseObject_Type.tp_new(type_obj, empty_args, Py_None);
Py_DECREF(empty_args);


when type_obj doesn't require arguments for constructing?

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