core dump in python -i from emacs

[Oscar65]

Crash report

What happened?

I was running this line on python -i from emacs:

>>> numbers = {random.tandint(1,100) for i in range(10)}
Traceback (most recent call last):

Process Python violación de segmento (core dumped)

I had previously 9 "SintaxError: invalid syntax".

I repeated all steps from beginning in python -i from emacs and I cannot reproduce error.

I attached gdb (bt full, info threads and thread apply all bt) with symbols.

I use Archlinux with kernel 6.17.9-arch1-1 #1 SMP PREEMPT_DYNAMIC Mon, 24 Nov 2025 15:21:09 +0000 x86_64 GNU/Linux

gdb_Python3.13.txt

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.13.7 (main, Aug 15 2025, 12:34:02) [GCC 15.2.1 20250813]

[devdanzin]

I can't reproduce either with just that line (which raises an AttributeError), nor with a fixed version of that line.

If you can better describe what exactly "running python -i from emacs" means (steps to match what you did) plus what code was causing the SyntaxError, it might be possible to reproduce. Also, any information about your emacs environment (e.g. were you using a LSP?) could help.

I hope the backtrace is enough for someone to diagnose this issue.

Thanks for the report!

[StanFromIreland]

I also cannot reproduce, in emacs:

[Oscar65]

I can't reproduce either with just that line (which raises an AttributeError), nor with a fixed version of that line.

If you can better describe what exactly "running python -i from emacs" means (steps to match what you did) plus what code was causing the SyntaxError, it might be possible to reproduce. Also, any information about your emacs environment (e.g. were you using a LSP?) could help.

I hope the backtrace is enough for someone to diagnose this issue.

Thanks for the report!

I tell you that I can't reproduce. I attached bt with debug symbols. Maybe with this information you can realize why it happens.

In emacs text mode I opened a python file and press CTRL+C+P that opens a new buffer with Python interpreter. Then in this new buffer I typed some commands causing Python's core dump.

[StanFromIreland]

I was unable to reproduce this in emacs, without a reproducer this it will be difficult for us to fix this issue, as such I will close this.