[Caffe2]How to use 'Split Operator' with the second input tensor? I got a segment fault

The second Blob’s tensor is on GPU, and its shape is (2,) with content [1000 200], int32 type.
And the tensor I want to split has 1200 length on the axis I want to split.
But I got a segment fault when runing this Operator. Can anyone help me? Thank you very much.