https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69098
--- Comment #1 from hir...@trash-mail.com ---
The error message I got, copied from Wandbox:
prog.cc: In instantiation of 'static void
Specializer::InnerClassTempl<<anonymous> >::InnerMemberFn() [with unsigned int
<anonymous> = 0u]':
prog.cc:16:24: required from here
prog.cc:33:36: error: 'template<bool P> constexpr void (Specializer::* const
SpecPerType<Specializer>::SpecMbrFnPtr)()<<anonymous> >' is not a function
template
typename Spec::FnType ErrorSite = Spec::template SpecMbrFnPtr<true>;
^~~~
prog.cc:33:36: error: 'SpecMbrFnPtr<true>' is not a member of 'Spec {aka
SpecPerType<Specializer>}'
