pip does not reset terminal in its original settings on error

[liar666]

Environment

• pip version: pip 20.0.2
• Python version: Python 3.8.5
• OS: Linux Mint 20
• xfce4-terminal: 0.8.9.1

Description

When I update my all my python packages, using a technique like the one in [2], I often encounter the "Memory error" [1]. Mostly due to the installation of the (laaaaarge) Torch package.

[1] https://stackoverflow.com/questions/29466663/memory-error-while-using-pip-install-matplotlib#31526029
[2] https://stackoverflow.com/questions/2720014/how-to-upgrade-all-python-packages-with-pip/3452888#3452888

When this error occurs, I loose the cursor in my terminal (and other small terminal configurations). I need to reset the terminal.

Expected behavior
Even on error, my terminal should be reset to its original configuration (no cursor loss).

How to Reproduce

• (Use a memory limited machine/VM ?)
• Create a venv
• Install an old version of torch in the venv
• Update all packages with `pip freeze | cut -d "=" -f1 | xargs -n1 pip install --upgrade

Output

• Get the 'memory error'
• Observe that the cursor in the terminal disappears
• Use reset to recover your terminal configuration