message: dlpack cleanup should aquire the GIL
diff: @@ -18,6 +18,7 @@ static_assert(sizeof(DLManagedTensor) == 64, "Alignment issue?");
  static void cleanup(DLManagedTensor *mt) {
  + py::gil_scoped_acquire acquire;
  delete[] mt->shape;
  delete[] mt->strides;
  Py_DECREF(mt->manager_ctx);
  