[Bug c++/57388] [C++11] ICE when function types with ref-qualifiers meet other function types

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57388

--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
Extending std::is_function in regard to ref-qualified functions will depend on
that issue. I haven't found a way to get around these ICEs in the (updated)
test cases.