fix crash with return alternative on CUDA #2798

Job	Run time
build-and-push-docker-images	1h 49m 41s
build-and-push-docker-images	1h 49m 41s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	5m 57s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	5m 57s
build-and-test-cpp-aarch64 (openblas)	4m 14s
build-and-test-cpp-aarch64 (openblas)	4m 14s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	5m 4s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	5m 4s
build-python-wheels (ubuntu-20.04, auto64)	2h 1m 45s
build-python-wheels (ubuntu-20.04, auto64)	2h 1m 45s
build-and-test-cpp-x86_64 (macos-11, mkl)	11m 42s
build-and-test-cpp-x86_64 (macos-11, mkl)	11m 42s
build-python-wheels (macos-11, auto64)	37m 36s
build-python-wheels (macos-11, auto64)	37m 36s
check-python-style	9s
check-python-style	9s
build-and-test-cpp-x86_64 (macos-11, dnnl)	10m 38s
build-and-test-cpp-x86_64 (macos-11, dnnl)	10m 38s
build-python-wheels (windows-2019, auto64)	5h 32m 1s
build-python-wheels (windows-2019, auto64)	5h 32m 1s
build-python-wheels (ubuntu-20.04, aarch64)	1h 14m 38s
build-python-wheels (ubuntu-20.04, aarch64)	1h 14m 38s
build-python-wheels (macos-11, arm64)	13m 23s
build-python-wheels (macos-11, arm64)	13m 23s
test-python-wheels (ubuntu-20.04)	9m 39s
test-python-wheels (ubuntu-20.04)	9m 39s
build-and-deploy-docs	1m 2s
build-and-deploy-docs	1m 2s
test-python-wheels (macos-11)	1s
test-python-wheels (macos-11)	4m 36s
test-python-wheels (windows-2019)	6m 23s
test-python-wheels (windows-2019)	6m 23s
publish-python-wheels-on-pypi	0s
publish-python-wheels-on-pypi	0s
	1d 0h 52m 21s

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