Crash when using .clone on MetricCollection with MatthewsCorrCoef

[arroqc]

🐛 Bug

When building a MetricCollection with MatthewsCorrCoef as part of the list, the use of .clone method raises an error.
This happens only in 0.10.0. The same code in 0.9.3 will work.

To Reproduce

1. Install torchmetrics 0.10.0
2. Use code sample below

This will lead to the following issue when .clone tries to deepcopy:

>>> metrics.clone(prefix='train')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "./anaconda3/envs/pytorch/lib/python3.8/site-packages/torchmetrics/collections.py", line 300, in clone
    mc = deepcopy(self)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 172, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 270, in _reconstruct
    state = deepcopy(state, memo)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 230, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 172, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 296, in _reconstruct
    value = deepcopy(value, memo)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 172, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "./anaconda3/envs/pytorch/lib/python3.8/copy.py", line 264, in _reconstruct
    y = func(*args)
  File "./anaconda3/envs/pytorch/lib/python3.8/copyreg.py", line 91, in __newobj__
    return cls.__new__(cls, *args)
TypeError: __new__() missing 1 required positional argument: 'num_classes'

Code sample

import torchmetrics
metrics = torchmetrics.MetricCollection([torchmetrics.MatthewsCorrCoef(num_classes=2, threshold=0.5)])
metrics.clone(prefix='train')

Expected behavior

Clone doesn't crash :)

Environment

pip install torchmetrics==0.10.0

• Python & PyTorch Version (e.g., 1.0): Python 3.8. torch 1.12.1
• Any other relevant information such as OS (e.g., Linux): Tested on local mac and inside linux docker

[github-actions]

Hi! thanks for your contribution!, great first issue!

[SkafteNicki]

Hi @arroqc, this is a similar issue to #1274, which has been resolved in #1250 after #1249. Please update to version v0.10.1 that was released 5 days ago (https://github.com/Lightning-AI/metrics/releases/tag/v0.10.1)