Step to reproduce in Fedora 39 with python 3.12: 1. Type the following in a terminal: python3 -c "import brlapi; brlapi.Connection()" Expected results: No crash. Actual results: double free or corruption (!prev) Aborted (core dumped) Impact: If Orca* is launched with braille enabled, Orca crashes. NOTE: Orca v45.alpha wouldn't launch due to a python 3.12 incompatibility. That was fixed (see https://gitlab.gnome.org/GNOME/orca/-/issues/385). I (Orca maintainer) did the beta release earlier today. That release works just fine for me using Fedora 39 -- unless braille is enabled. Which it is by default in new environments -- and existing environments where the Orca user didn't explicitly disable it. I will see if there's something I can do to prevent Orca from crashing when braille is enabled. But the crash as described in the step to reproduce needs to be fixed. Related: Arch had the same problem with the apparent fix being to rebuild brltty using cython 0.29.36. See https://www.freelists.org/post/orca/cant-start-orca-segfault-on-Arch-Linux-with-new-glibc,1 Reproducible: Always Steps to Reproduce: See above.
Looks like we do have cython 0.29 available for things that can't build with 3 yet, so I'll do that.
Please test with https://bodhi.fedoraproject.org/updates/FEDORA-2023-25b583184f (also there's https://bodhi.fedoraproject.org/updates/FEDORA-2023-0326b8d4a3 for Rawhide).
Thank you Adam!
In the meantime, I've got a workaround in Orca. If the users tell me it's all good (where "good" means "Orca doesn't crash"), I'll roll a "gamma" release. My guess is that Arch and Fedora will not be the only distros hit by this. :-/ Anyhoo, thanks for the quick solution in Fedora. Will see about testing later. Might be tomorrow....
The command listed for "how to install" still isn't doing anything for me (though admittedly it hasn't been 24 hours yet). Therefore, I just downloaded the RPMS from which I installed: * brltty-6.6-3.fc39.x86_64.rpm * python3-brlapi-0.8.5-3.fc39.x86_64.rpm * brlapi-0.8.5-3.fc39.x86_64.rpm * brlapi-devel-0.8.5-3.fc39.x86_64.rpm The crash in the opening report is gone and Orca is working with braille again. Thanks!
Yes, it will at minimum only work after the next Branched compose is complete and synced to mirrors; today's compose completed at 11:01 UTC, three hours after you tried. The instructions are really meant for stable releases, Branched is a bit different.
Oh, btw, now you found a fix to make it work with Cython 3, I'll backport that and drop the < 3 constraint for a new build...
I didn't. Lukáš Tyrychtr. I *think* he works for your company. In which case, good hire. :) I took a quick glance at the thread. It looks like there's a modified version of the fix under consideration.
I said you found it, not you wrote it :D Yeah, I'm doing a scratch build with the second version of the patch ATM. I had the exact same worry about Lukáš' version.
OK, the scratch build works here, so I'm running official -4 builds for F39 and Rawhide.
F40 - https://bodhi.fedoraproject.org/updates/FEDORA-2023-2efdb5c2de F39 - https://bodhi.fedoraproject.org/updates/FEDORA-2023-9bdf234904