Progress bar bug breaks torch installation on Travis CI

Environment

• pip version: 18.1
• Python version: 3.5.6, 3.6.7, 3.7.1
• OS: Ubuntu Xenial
• CI: Travis

Description

Installing torch with pip on Travis CI results in the following error:

Collecting torch>=0.4 (from -r requirements.txt (line 7)) Downloading https://files.pythonhosted.org/packages/f5/3b/0b8de6e654c2983898564226792c6f09d9bcaba97b7b29c40e4ed4ae43ed/torch-1.0.0-cp37-cp37m-manylinux1_x86_64.whl (591.8MB) 73% |███████████████████████▌ | 434.3MB 36.8MB/s eta 0:00:05 The job exceeded the maximum log length, and has been terminated.

Expected behavior

This shouldn’t be problematic. All other Python dependencies were successfully installed via pip on Travis CI.

How to Reproduce

1. Create an empty GitHub repository
2. Add a .travis.yml file that tries to pip install torch during the install phase
3. Add Travis CI via GitHub Apps integration and initiate a build

Output

One of the times I submitted, I got lucky and saw the following log: It appears that there is a bug in the progress bar. This may only affect very large downloads like torch.

Known Workarounds

The following workaround solved the problem for me:

$ pip install --progress-bar off ...

It would be good to get the progress bar fixed though.

[native-api]

The progress bar output in the Travis log looks just as “broken” for other downloads, too. The only difference is they don’t take as long, so the amount of garbage in the log is insufficient to go over the log size limit.

[lock[bot]]

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