https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 67878, which changed state.
Bug 67878 Summary: [concepts] when processing a valid concept check, gcc errors trying to expand variadic in unrelated code https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67878 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |WORKSFORME