Start gdb python. Set a breakpoint in the shared module. continue.
On Sun, Nov 19, 2023 at 1:02 PM Ranjan Maitra via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Sun Nov19'23 05:35:19PM, Barry wrote:
> From: Barry <barry@xxxxxxxxxxxxxxxx>
> Date: Sun, 19 Nov 2023 17:35:19 +0000
> To: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx>
>
> >
> >
> > It is possible that there is a bug in the code itself, but nothing above
> > points to my created code.
> >
> > Any suggestions? Or is this a bug?
>
> Are you using C extensions in your code? If so I would suspect them for corrupting python. I think you can get into gdb inside the core file with coredumpctl debug.
The python code calls a shared object library that is written in C. But
why does this core dump only happen in F39 (python 3.12) and not with
F38 (python 3.11)?
> What does “info shared” tell you about what code has been loaded into memory?
This would be under gdb, I presume.
> It is also worth trying to find the type of the object that is being deleted, _PyObject_Free will have pointer to the object.
> Also not sure where siplib.c is from is it python or an extension?
Thanks, I don't know either, but there is no siplib.c anywhere on either
of my two systems.
> I am assuming here that you are familiar with debugging with gdb.
Thanks, I am familiar with using gdb for a C program, never used it with
python code calling a C shared object.
I tried:
$ gdb python "./test.py ultadanga.tiff ultadanga-64-rgb.png 1 7"
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Reading symbols from python...
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<https://debuginfod.fedoraproject.org/>
Enable debuginfod for this session? (y or [n]) y
Debuginfod has been enabled.
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Reading symbols from /home/localuser/.cache/debuginfod_client/07023eb4f297ae1d4591e--Type <RET> for more, q to quit, c to continue without paging--
c808ab20b2788c542be/debuginfo...
./test.py ultadanga.tiff ultadanga-64-rgb.png 1 7: No such file or directory.
(gdb)
Not quite sure how to proceed here.
Many thanks again, and best wishes,
Ranjan
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