Fix to pass compilation with cuda9
@@ -89,7 +89,7 @@ void cupy::thrust::_lexsort(size_t *idx_start, void *keys_start, size_t k, size_
sequence(cuda::par.on(stream_), dp_first, dp_last);
for (size_t i = 0; i < k; ++i) {
T *key_start = static_cast<T*>(keys_start) + i * n;
- stable_sort< system::cuda::detail::execute_on_stream, device_ptr<size_t> >(
+ stable_sort(
cuda::par.on(stream_),
dp_first,
dp_last,
