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@lists.fedoraproject.org> wrote:
> On Sun Nov19'23 05:35:19PM, Barry wrote: > > From: Barry <ba...@barrys-emacs.org> > > Date: Sun, 19 Nov 2023 17:35:19 +0000 > > To: Community support for Fedora users <users@lists.fedoraproject.org> > > > > > > > > > > > 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" > GNU gdb (Fedora Linux) 13.2-10.fc39 > Copyright (C) 2023 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later < > http://gnu.org/licenses/gpl.html> > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. > Type "show copying" and "show warranty" for details. > This GDB was configured as "x86_64-redhat-linux-gnu". > Type "show configuration" for configuration details. > For bug reporting instructions, please see: > <https://www.gnu.org/software/gdb/bugs/>. > Find the GDB manual and other documentation resources online at: > <http://www.gnu.org/software/gdb/documentation/>. > > For help, type "help". > Type "apropos word" to search for commands related to "word"... > Reading symbols from python... > > This GDB supports auto-downloading debuginfo from the following URLs: > <https://debuginfod.fedoraproject.org/> > Enable debuginfod for this session? (y or [n]) y > Debuginfod has been enabled. > To make this setting permanent, add 'set debuginfod enabled on' to > .gdbinit. > 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 > > -- > _______________________________________________ > users mailing list -- users@lists.fedoraproject.org > To unsubscribe send an email to users-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > Do not reply to spam, report it: > https://pagure.io/fedora-infrastructure/new_issue > -- *Those who don't understand recursion are doomed to repeat it*
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