https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104642 --- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> --- The suggested -funreachable-traps seems to have a lot of overlap with -fsanitize-undefined-trap-on-error; I wonder about combining them, and having it by itself imply -fsanitize=unreachable.