potential windows fix

Author: rusty1s

.travis.yml

@@ -27,7 +27,7 @@ env:
     # - TORCH_VERSION=1.4.0 PYTHON_VERSION=3.5 IDX=cu101
 
 jobs:
-  exclude:  # Exclude all macOS CUDA jobs and Windows cu100 job.
+  exclude:  # Exclude all macOS CUDA jobs and Windows CUDA 10.0 jobs.
     - os: osx
       env: TORCH_VERSION=1.4.0 PYTHON_VERSION=3.8 IDX=cu92
     - os: osx
@@ -63,8 +63,8 @@ jobs:
 
 
 install:
-  - source script/cuda.sh
   - source script/conda.sh
+  - source script/cuda.sh
   - conda create --yes -n test python=${PYTHON_VERSION}
   - source activate test
   - if [ ${TRAVIS_OS_NAME} = "windows" ] || [ $IDX != "cu92" ]; then conda install pytorch=${TORCH_VERSION} ${TOOLKIT} -c pytorch -c defaults -c numba/label/dev --yes; else conda install pytorch=${TORCH_VERSION} ${TOOLKIT} -c pytorch --yes; fi

script/cuda.sh

@@ -102,3 +102,10 @@ if [ "${TRAVIS_OS_NAME}" = "windows" ] && [ "${IDX}" = "cu92" ]; then
   sed -i.bak -e '129,141d' "${CUDA_PATH}/include/crt/host_config.h"
   cat -n "${CUDA_HOME}/include/crt/host_config.h"
 fi
+
+# Fix "member may not be initialized" error on Windows: https://github.com/pytorch/pytorch/issues/27958
+if [ "${TRAVIS_OS_NAME}" = "windows" ] && [ "${IDX}" != "cpu" ]; then
+  sed -i.bak -e 's/constexpr/const/g' /c/tools/miniconda3/envs/test/lib/site-packages/torch/include/torch/csrc/jit/script/module.h
+  sed -i.bak -e 's/constexpr/const/g' /c/tools/miniconda3/envs/test/lib/site-packages/torch/include/torch/csrc/jit/script/argument_spec.h
+  sed -i.bak -e 's/return \*(this->value)/return \*((type\*)this->value)/g' /c/tools/miniconda3/envs/test/lib/site-packages/torch/include/pybind11/cast.h
+fi