http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61080
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Paolo Carlini from comment #5)
> Thanks. Thus should we go back to the pre-r210043 behavior and somehow
> handle the case in instantiate_decl under the early:
>
> if (/* If there is no definition, we cannot instantiate the
> template. */
> ! pattern_defined
> /* If it's OK to postpone instantiation, do so. */
> || defer_ok
> /* If this is a static data member that will be defined
> elsewhere, we don't want to instantiate the entire data
> member, but we do want to instantiate the initializer so that
> we can substitute that elsewhere. */
> || (external_p && VAR_P (d)))
> {
> /* .... */
>
> which does very few checks and then soon does goto out?
Yes, we probably want to add a deleted check to this condition.
