torch.device parsing does not do enough checks #32079
Description
In [2]: import torch
In [3]: torch.device("cuda:2 cuda:3")
Out[3]: device(type='cuda', index=2)
In [4]: torch.__version__
Out[4]: '1.4.0.dev20191205'{{ message }}
In [2]: import torch
In [3]: torch.device("cuda:2 cuda:3")
Out[3]: device(type='cuda', index=2)
In [4]: torch.__version__
Out[4]: '1.4.0.dev20191205'