dimension specified as 0 but tensor has no dimensions

[Susan19900316]

the issue is as follows:
Traceback (most recent call last):
File "/usr/share/pycharm/helpers/pydev/pydevd.py", line 1758, in
main()
File "/usr/share/pycharm/helpers/pydev/pydevd.py", line 1752, in main
globals = debugger.run(setup['file'], None, None, is_module)
File "/usr/share/pycharm/helpers/pydev/pydevd.py", line 1147, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "/usr/share/pycharm/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "/media/zy/Documents/FreeAnchor/tools/train_net.py", line 171, in
main()
File "/media/zy/Documents/FreeAnchor/tools/train_net.py", line 164, in main
model = train(cfg, args.local_rank, args.distributed)
File "/media/zy/Documents/FreeAnchor/tools/train_net.py", line 73, in train
arguments,
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/engine/trainer.py", line 56, in do_train
for iteration, (images, targets, _) in enumerate(data_loader, start_iter):
File "/media/zy/Software/miniconda/envs/free_anchor/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 582, in next
return self._process_next_batch(batch)
File "/media/zy/Software/miniconda/envs/free_anchor/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 608, in _process_next_batch
raise batch.exc_type(batch.exc_msg)
IndexError: Traceback (most recent call last):
File "/media/zy/Software/miniconda/envs/free_anchor/lib/python3.7/site-packages/torch/utils/data/_utils/worker.py", line 99, in _worker_loop
samples = collate_fn([dataset[i] for i in batch_indices])
File "/media/zy/Software/miniconda/envs/free_anchor/lib/python3.7/site-packages/torch/utils/data/_utils/worker.py", line 99, in
samples = collate_fn([dataset[i] for i in batch_indices])
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/data/datasets/coco.py", line 58, in getitem
img, target = self.transforms(img, target)
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/data/transforms/transforms.py", line 15, in call
image, target = t(image, target)
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/data/transforms/transforms.py", line 70, in call
image, target = resizer(image, target)
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/data/transforms/transforms.py", line 58, in call
target = target.resize(image.size)
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/structures/bounding_box.py", line 124, in resize
v = v.resize(size, *args, **kwargs)
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/structures/segmentation_mask.py", line 184, in resize
scaled.append(polygon.resize(size, *args, **kwargs))
File "/media/zy/Documents/FreeAnchor/maskrcnn_benchmark/structures/segmentation_mask.py", line 117, in resize
p[0::2] *= ratio_w
IndexError: dimension specified as 0 but tensor has no dimensions

the version of pytorch is 1.1.0.
How to fix the problem

[zhangxiaosong18]

What is your version of torchvision, this problem may be because it is different from what I used. Please check torchvision==0.2.1.

[Susan19900316]

@zhangxiaosong18 I checked the version of torchvision and torchvision==0.2.1. I installed all the python libraries recording to INSTALL.md you offered.

[zhangxiaosong18]

Are you using other datasets? This may because my code still loading the mask, although it is not used, please delete line 51-53 in maskrcnn_benchmark/data/datasets/coco.py, as:

# to remove segmentation mask
# masks = [obj["segmentation"] for obj in anno]
# masks = SegmentationMask(masks, img.size)
# target.add_field("masks", masks)

[zhangxiaosong18]

I have updated it to the master branch.

[Susan19900316]

The problem has been fixed when I deleted line 51-53 in coco.py. Thank you!