https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118047
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #8) > (In reply to Sam James from comment #7) > > (In reply to Sam James from comment #6) > > > r12-7803-gf0530882d99abc > > > > .. but that patch got backported to 11? > > Maybe some other patch which didn't get backported is interacting here. Like r12-6028-ga37e8ce3b66325 (which might explain the difference between C++14 and C++11) .