https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115810
--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> --- Created attachment 58607 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58607&action=edit Preprocessed source This all_meta.cpp.ii.gz file repros the problem with Ubuntu's g++-14 14.0.1 compiler, using: /usr/bin/g++-14 -O -std=gnu++23 -o all_meta.cpp.o -c /tmp/all_meta.cpp.ii I can't reproduce it with vanilla 14.1.0 or Fedora's 14.1.1 I think this is an Ubuntu bug.