[Bug c++/58569] Compilation error when a class contains multiple std::function

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58569

--- Comment #6 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to Jonathan Wakely from comment #4)

Why would LWG 2132 require any such check during the instantiation of the class
template or during the instantiation of the default constructor? The
constraints are only imposed on template members.