Running the following code yields very strange results:

```
for i in range(100):
a = torch.rand((189,4))
b = torch.rand((189,4), dtype=torch.float64)
print(torch.max(a[:,:2]+b[:,:2]))
```

Gives:

```
tensor(2.8119e+275, dtype=torch.float64)
tensor(nan, dtype=torch.float64)
tensor(nan, dtype=torch.float64)
tensor(2.8119e+275, dtype=torch.float64)
tensor(9.2142e+269, dtype=torch.float64)
tensor(9.2142e+269, dtype=torch.float64)
...
```

Note that for this to happen the tensors need to have different types and the operation has to involve a slice (simple a + b behaves normally)

Am I missing something? Thanks in advance.

Pytorch 1.3.0