| Title | pytorch pytorch (torch.nn.utils.rnn.unpack_sequence) torch 2.6.0 Segmentation fault |
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| Description | # Bug Description
Calling `unpack_sequence` on an empty PackedSequence leads to a segmentation fault.
# Reproduction Steps
Run the following code:
```
import torch
from torch.nn.utils.rnn import PackedSequence, unpack_sequence
empty_data = torch.tensor([])
empty_batch_sizes = torch.tensor([], dtype=torch.int64)
packed = PackedSequence(data=empty_data, batch_sizes=empty_batch_sizes)
unpack_sequence(packed)
```
# Observed Behavior
The program crashes with a segmentation fault, indicating an invalid memory access. |
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| Source | ⚠️ https://github.com/pytorch/pytorch/issues/149622 |
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| User | Default436352 (UID 81891) |
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| Submission | 2025-03-20 15時43分 (4 月前) |
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| Moderation | 2025-03-30 19時42分 (10 days later) |
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| Status | 已接受 |
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| VulDB Entry | 302048 [PyTorch 2.6.0 torch.nn.utils.rnn.unpack_sequence 内存损坏] |
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| Points | 20 |
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