ZeroDivisionError: float division by zero

[whansk50]

Traceback (most recent call last):
  File "train.py", line 66, in <module>
    train(train_img_path, train_gt_path, pths_path, batch_size, lr, num_workers, epoch_iter, save_interval)	
  File "train.py", line 35, in train
    for i, (img, gt_score, gt_geo, ignored_map) in enumerate(train_loader):
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 530, in __next__
    data = self._next_data()
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 1204, in _next_data
    return self._process_data(data)
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 1250, in _process_data
    data.reraise()
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/_utils.py", line 457, in reraise
    raise exception
ZeroDivisionError: Caught ZeroDivisionError in DataLoader worker process 4.
Original Traceback (most recent call last):
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/utils/data/_utils/worker.py", line 287, in _worker_loop
    data = fetcher.fetch(index)
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/utils/data/_utils/fetch.py", line 49, in fetch
    data = [self.dataset[idx] for idx in possibly_batched_index]
  File "/home/***/miniconda3/envs/gpu38/lib/python3.8/site-packages/torch/utils/data/_utils/fetch.py", line 49, in <listcomp>
    data = [self.dataset[idx] for idx in possibly_batched_index]
  File "/home/***/EAST/dataset.py", line 389, in __getitem__
    img, vertices = crop_img(img, vertices, labels, self.length)
  File "/home/***/EAST/dataset.py", line 221, in crop_img
    flag = is_cross_text([start_w, start_h], length, new_vertices[labels==1,:])
  File "/home/***/EAST/dataset.py", line 181, in is_cross_text
    if 0.01 <= inter / p2.area <= 0.99:
ZeroDivisionError: float division by zero

Why is this error occurred??
I checked my custom dataset again and again, but no difference is shown with sample ICDAR dataset...

+) Exception was handled, but I don't think it's valid because it's a temporary method