pip install torchtext==0.7.0 installs incompatible PyTorch 1.7.0

[da03]

🐛 Bug

Describe the bug
Recently, after I do pip install torchtext==0.7.0, import torchtext would cause segmentation fault. I found that degrading pytorch to 1.6.0 fixes this issue.

To Reproduce
Steps to reproduce the behavior:

1. pip install torchtext==0.7.0 (assuming that pytorch is not installed yet, and this command will install the latest pytorch)
2. python -c "import torchtext"

Expected behavior
Segmentation Fault

Environment

• PyTorch Version (e.g., 1.0): 1.7.0
• OS (e.g., Linux): Linux/MacOS
• Python: 3.8.3

[zhangguanheng66]

Yup. That's expected. Since we add cpp extension in torchtext, we have to publish torchtext and pytorch together for compatibility. You should use torchtext=0.8.0 with torch=1.7.0. Any version before 0.7.0 has python only so the compatibility is not an issue. Feel free to re-open the issue if you still have questions.

[mthrok]

But, shouldn't pip install torchtext==0.7.0 install pytorch==1.6 then?

[zhangguanheng66]

But, shouldn't pip install torchtext==0.7.0 install pytorch==1.6 then?

It should but obviously it didn't. If users would like the access to the previous version, please follow the version compatibility on README file of the repo.

[da03]

But, shouldn't pip install torchtext==0.7.0 install pytorch==1.6 then?

It should but obviously it didn't. If users would like the access to the previous version, please follow the version compatibility on README file of the repo.

Is it possible for you to fix this such that pip install torchtext==0.7.0 automatically installs pytorch==1.6 ? torchtext 0.7.0 was released only a few months ago and lots of users are still using that due to the overhaul of code in later versions (such as the retiring of Field and Batch).

[zhangguanheng66]

Let me follow-up with @seemethere

[seemethere]

Yup looks like this is a real bug, we don't actually set a specific torch version in the setup.py

https://github.com/pytorch/text/blob/v0.8.0-rc2/setup.py#L85

[zhangguanheng66]

This will be addressed in the next release to fix the torch/torchtext version.