https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70820
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jason at gcc dot gnu.org
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
14.7.1: "The implicit instantiation of a class template specialization causes
the implicit instantiation of the declarations, but not of the definitions,
default arguments, or exception-specifications of the class member functions,
member classes, scoped member enumerations, static data members and member
templates; and it causes the implicit instantiation of the definitions of
unscoped member enumerations and member anonymous unions."
So I don't think that the instantiation of Base<Derived> requires the
instantiation of the definition of Base<Derived>::i.
