https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118819
--- Comment #2 from Sam James <sjames at gcc dot gnu.org> --- I should probably propose those options as default UBSAN_OPTIONS for bootstrap (the non-fatal parts) as that's trivial. I have it staged as part of a draft for PR116948 but I didn't really think about the usefulness of the other parts by themselves.
