https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81004
--- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> --- Weird, for me I see the problem reproducing with $ ~/8-install/bin/g++ --version g++ (GCC) 8.0.1 20180124 (experimental) Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. but not with $ ~/8-install-slow/bin/g++ --version g++ (GCC) 8.0.1 20180205 (experimental) Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. so it seems the problem went away in those few days but I do not recall anything related being commit. Martin, would it be possible to bisect this? (hope it is not --enable-checking=release used to build first compiler)