On 2025-11-04 08:02, Emanuele Rocca wrote: > The segfault also does not occur with -O3, and the important difference > seems to be that -O3 enables -fschedule-insns (without trailing '2'). Importantly, gcc-15 does not have -fschedule-insns at -O2, whereas gcc-14 does. I think this is where the change came from: https://gcc.gnu.org/pipermail/gcc-patches/2024-October/667074.html