https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63695
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > OK, so this confirms my suspicion: you had an unsuitable snapshot as your > Ada bootstrap compiler. > > Arno Well, this does not answer my underlying question: what made my bootstrap compiler unsuitable after the batch of commits circa 216930?