https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
--- Comment #26 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Christian Franke from comment #25) > (In reply to Jonathan Wakely from comment #23) > > What if you test with -D_GLIBCXX_ASSERTIONS ? > > > > (I expect you'll get a crash for either c++14 or c++17) > > Yes. Good - at least things are working (or not working) as expected :-) > Fixed with patch from r262167. Great, thanks again.