[New-bugs-announce] [issue47117] repl segfaults on non utf-8 input

[Jon Åslund]

New submission from Jon Åslund <jon at aslund.org>:

Some bytes that are non utf-8 segfaults python repl in 3.10 and later on linux. Example:

$ python3.10
Python 3.10.4 (main, Mar 24 2022, 14:20:44) [GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> �
Segmentation fault (core dumped)

It is treated correctly in Python 3.9 and earlier

$ python3.9
Python 3.9.12 (main, Mar 24 2022, 14:21:53) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> �
  File "<stdin>", line 0
    
SyntaxError: (unicode error) 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte

How to reproduce:

In Gnome on Ubuntu 20.04 with the Swedish keyboard layout, holding left alt and pressing the ö key enters the byte 0xb6 into the terminal.

I have only been able to make it crash the repl. I can't make it crash the parser. For instance trying to eval the byte.

----------
messages: 415992
nosy: jooon
priority: normal
severity: normal
status: open
title: repl segfaults on non utf-8 input
type: crash
versions: Python 3.10, Python 3.11

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue47117>
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