https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107678
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Perhaps some previously latent buffer overflow? I'm aware of e.g. __builtin_init_dwarf_reg_size_table theoretical problem with SVE, the builtin computes register sizes in 8-bit unsigned integers, but SVE can have 256-byte values.