I could now, knowing that it is O3+LTO also reproduce it with upstream
git :-)

I checked the former 2.30.6 which would also behave the same way if LTO
and O3 are enabled, so at the end it wasn't the new version of libsdl2
at all.

I submitted it to upstream for their awareness.

Reproducible builds:
- https://github.com/libsdl-org/SDL/issues/11565
- https://github.com/libsdl-org/SDL/pull/11566

LTO+O3 crash:
- https://github.com/libsdl-org/SDL/issues/11567

The options now are fixing it (if upstream wants and can) or disabling LTO or 
O3.
I've asked Foundations/Doko which they prefer.

Once we know which way we should fix this, we can try and upload with
that.

** Bug watch added: github.com/libsdl-org/SDL/issues #11565
   https://github.com/libsdl-org/SDL/issues/11565

** Bug watch added: github.com/libsdl-org/SDL/issues #11567
   https://github.com/libsdl-org/SDL/issues/11567

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https://bugs.launchpad.net/bugs/2089779

Title:
  Buffer overflow in autopkgtest of wesnoth

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