Hello.
I'm using Debian Testing (upgraded from Debian 10). Today I started Python 3, 
but it was not able to interpret any commands from stdin and resulted in 
Segmentation Fault. Luckily modules (python3 -m <module>) and files (python3 
<file>) works fine though.

Observed:
$ python3
Python 3.8.3rc1 (default, Apr 30 2020, 07:33:30)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> print
<No output, nothing>
<Press any key>
Segmentation fault

Screen capture that could help : 
https://www.dropbox.com/s/9w941t93ymem1x1/python3_issue-2020-08-04_19.38.28.mp4?dl=0

Some additional info:
1. I tried running a file that takes input from user (using input function), it 
also didn't work. So I think something regarding standard input has broken.
2. Python 2 also has the exact, same issue. So both Pythons face the problem !

I have IPython installed, which works fine without any issue.
The very recent installations I made :
Installed Emacs (~ 2 days ago)
Installed and removed Neovim (~ 1 day ago)

I tried reinstalling Python by : sudo apt reinstall python3
But it didn't fix the issue.

Though I hardly use live session of Python 3 (I use IPython for live sessions), 
having a broken Python 3 scares me. Any help regarding the issue is greatly 
appreciated. :)

Thanks
J Arun Mani

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