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Differential Revision: [D23886919](https://our.internmc.facebook.com/intern/diff/D23886919)

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Currently investigating issue where indexing with an empty list in eager returns a tensor with a zero-sized dim in the empty list spot *OTOH* the scripted module will throw this error:
" RuntimeError: The following operation failed in the TorchScript interpreter.
    Traceback of TorchScript (most recent call last):
    RuntimeError: Input must be of ints, floats, or bools, got Tensor
    Empty lists default to List[Tensor]. Add a variable annotation to the
    assignment to create an empty list of another type
    (torch.jit.annotate(List[T, []]) where T is the type of elements in the
    list for Python 2) "

Differential Revision: [D23886919](https://our.internmc.facebook.com/intern/diff/D23886919)

[ghstack-poisoned]

Currently investigating issue where indexing with an empty list in eager returns a tensor with a zero-sized dim in the empty list spot *OTOH* the scripted module will throw this error:
" RuntimeError: The following operation failed in the TorchScript interpreter.
    Traceback of TorchScript (most recent call last):
    RuntimeError: Input must be of ints, floats, or bools, got Tensor
    Empty lists default to List[Tensor]. Add a variable annotation to the
    assignment to create an empty list of another type
    (torch.jit.annotate(List[T, []]) where T is the type of elements in the
    list for Python 2) "

Differential Revision: [D23886919](https://our.internmc.facebook.com/intern/diff/D23886919)

[ghstack-poisoned]

Differential Revision: [D23886919](https://our.internmc.facebook.com/intern/diff/D23886919)

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