Bug#1115705: libsdl3-0: 3.3.x regression: SDL_image's showimage example segfaults on s390x

[Simon McVittie]

On Tue, 23 Sep 2025 at 06:55:34 +0000, Pranav P wrote:
>https://paste.debian.net/1397762/
>This link contains the full backtrace generated through gdb.

Thanks, that was very helpful. I've forwarded this information to 
https://github.com/libsdl-org/SDL/issues/13953 and prepared a possible 
patch in https://github.com/libsdl-org/SDL/pull/14029.

I still haven't been able to reproduce this crash myself (I'm not sure 
why not, perhaps there is something missing in my schroot that causes 
SDL not to go down this code path) but the casts that I was suspicious 
about do look like something that would work on little-endian but not on 
big-endian.

Please could you try with https://github.com/libsdl-org/SDL/pull/14029 
applied to your SDL3? I'm preparing an experimental upload versioned 
3.3~git20250903.1+ds-2 with that patch included, so if that has arrived 
on your mirror by the time you see this, you can just upgrade to it - or 
if it isn't there yet, you could add the patch to 3.3~git20250903.1+ds-1 
locally, and recompile.

>I am yet to reproduce this issue on the upstream github source code.
>I will do that and see if I can figure out more details.

Please try my patch first, and if that works for you, I think we can 
call this solved. If the patch doesn't work, then yes, please look into 
whether this is reproducible with the upstream code.

     smcv