Platforms: linux

This test was disabled because it is failing on master ([recent examples](http://torch-ci.com/failure/test_torch.py%3A%3ATestTorch%3A%3Atest_equal)).

The cause seems to point to https://github.com/pytorch/pytorch/pull/100024 (or D45282119 as it was landed internally)

cc @mruberry @houseroad @ezyang 
def _spawn_method(self, method, arg):
            try:
                mp.set_start_method('spawn')
            except RuntimeError:
                pass
            with mp.Pool(1) as pool:
                out: list = pool.map(method, [arg])
                self.assertTrue(out[0])
        def _test_multinomial_invalid_probs(probs):
            try:
                # n_samp
                torch.multinomial(probs.to('cpu'), 2)
                return False  # Should 
            except RuntimeError as e:
                return 'probability tensor contains either `inf`, `nan` or element < 0' in str(e)
            _spawn_method(_test_multinomial_invalid_probs, torch.tensor([1., -1., 1.]))
            _spawn_method(_test_multinomial_invalid_probs, torch.tensor([1., inf, 1.]))
            _spawn_method(_test_multinomial_invalid_probs, torch.tensor([1., -inf, 1.]))
            _spawn_method(_test_multinomial_invalid_probs, torch.tensor([1., 1., nan]))
    # FIXME: port to more appropriate test suite
    def test_to_with_tensor(self):