https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108772
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Does firefox really use -fimplicit-constexpr and -g1? Anyway, I'm afraid I have no idea what the problem is here, the ICE is when trying to force a DIE for std::_Sp_make_shared_tag::_S_ti()::__tag late, but there is no debug info for _S_ti() beucase it was implicitly marked constexpr and with -g1 probably not really used.