https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67564
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > Created attachment 37395 [details] > A provisional patch for the PR > > This fixes the immediate problem. I think some tidying up of unlimited > polymorphism is needed. In any case, I am not in a position to commit > for some days. > > Cheers > > Paul The patch works as advertised. Thanks.