TypeError: 'type' object is not subscriptable

[good-demo]

Hello,everyone, have you encountered this problem?

class DynamicBatchSampler(torch.utils.data.sampler.Sampler[List[int]]):
TypeError: 'type' object is not subscriptable

Evironment:
torch 1.4.0+cu100
torch-cluster 1.5.2
torch-geometric 2.1.0
torch-scatter 2.0.4
torch-sparse 0.5.1
torch-spline-conv 1.2.0

[rusty1s]

See #5285