https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96286
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> --- Created attachment 51402 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51402&action=edit patch to silence constexpr issues with erroneous functions Here are a couple of other commits I tried to reduce error cascades, but they also didn't help with the vector testcase.