[ONNX] handle aten::_set_item on Dict in convertInplaceOpsAndTrackAlias (#58317) (#58696)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58696
It seems the JIT produces an output for aten::_set_item on lists but
not on dicts. Previously the code would crash because it assumed it
was operating on a list.
The different behavior can be seen with the following test:
```python
class DictModule(torch.nn.Module):
def forward(self, x_in: torch.Tensor) -> typing.Dict[str, torch.Tensor]:
x_out = {}
x_out["test_key_out"] = x_in
return x_out
x_in = torch.tensor(1)
dms = torch.jit.script(DictModule())
torch.onnx.export(dms, (x_in,), "/dev/null", example_outputs=(dms(x_in),))
```
Before this change:
`RuntimeError: outputs_.size() == 1INTERNAL ASSERT FAILED at "../torch/csrc/jit/ir/ir.h":452, please report a bug to PyTorch.`
After this change:
`RuntimeError: Exporting the operator prim_DictConstruct to ONNX opset version 9 is not supported. Please feel free to request support or submit a pull request on PyTorch GitHub.`
This is a more useful error message.
Test Plan: Imported from OSS
Reviewed By: driazati
Differential Revision: D28714804
Pulled By: SplitInfinity
fbshipit-source-id: 1e5dc5fb44d1e3f971a22a79b5cf009d7590bf84
Co-authored-by: Gary Miguel <garymiguel@microsoft.com>
