🐛 Bug

Currently CUDA extensions in PyTorch break using nvcc 10.2.89 with the following error:

/workspace/src/pytorch/torch/include/c10/util/variant.h: In function ‘constexpr decltype(auto) c10::visit(Visitor&&, Vs&& ...)’:
/workspace/src/pytorch/torch/include/c10/util/variant.h:2718:97: error: parameter packs not expanded with ‘...’:
     return (detail_::all({!vs.valueless_by_exception()...})

After debugging this issue, it appears to be related to an nvcc issue in CUDA version 10.2.89. As we are working on fixing this issue, it is recommended for those who compile CUDA extensions to use CUDA 10.1.168.

To Reproduce

Steps to reproduce the behavior:

# PyTorch compiled with CUDA10.2.89
git clone https://github.com/pytorch/extension-cpp
cd extension-cpp/cuda
python setup.py install

CC @csarofeen @ngimel

cc @ezyang @gchanan @zou3519 @yf225 @ngimel