Error with using GraphSAINTRandomWalkSampler

[freemanhm]

Compute GraphSAINT normalization: 0%| | 0/20956320 [00:00<?, ?it/s]
Process finished with exit code 139
This error raised when execute the code :train_loader = GraphSAINTRandomWalkSampler(alldata, batch_size=10000, walk_length=2, num_steps=100, sample_coverage=80, save_dir=self.dataset.processed_dir,num_workers=0 )
However, it would be executed successfully sometimes.

[rusty1s]

Hard to say what went wrong :( My guess is that this may be induced by isolated nodes. Does your graph contain such nodes?