[3.13] copyreg._reconstructor failures for protocol 0 and 1 for `dateutil.tz.tzutc`

Bug description:

In [25]: pickle.load(open('taskwarrior/f91b9e98-7586-4317-ae52-b516e97209e5', 'rb'))
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[25], line 1
----> 1 pickle.load(open('taskwarrior/f91b9e98-7586-4317-ae52-b516e97209e5', 'rb'))

File /usr/lib/python3.13/copyreg.py:44, in _reconstructor(cls, base, state)
     41 def _reconstructor(cls, base, state):
     42     if base is object:
     43         #obj = cls.__new__(cls)
---> 44         obj = object.__new__(cls)
     45     else:
     46         obj = base.__new__(cls, state)

TypeError: object.__new__(tzutc) is not safe, use tzutc.__new__()

It seems that cls.__new__(cls) is the correct way to achieve the desired effect for any type of object?

This issue was not present in 3.12, or at least same code on same pickles used to work.

I was not able to reproduce this with arbitrary data serialization/deserialization (e.g. pickle.dump(tzutc(), f); pickle.load(f) works), which suggests this is dependent on how exactly data is structured, and so I'm including the culprit pickle here: 74b9da0a-ab54-437f-9ab5-549e886d3c83.txt

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Bắt đầu với copyreg.py quanh dòng 44 và tái hiện lỗi pickle đính kèm trên Python 3.13 bằng dateutil.tz.tzutc. So sánh hành vi của protocol 0 và 1 với Python 3.12, sau đó xác minh rằng thay đổi được chọn vẫn giữ nguyên các trường hợp đang hoạt động và tải đúng pickle được cung cấp.