[Bug libstdc++/81017] Class with vector of unique_ptr and std::function does not compile

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81017

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
#include <memory>
#include <vector>
#include <functional>

struct Foo {
    std::vector<std::unique_ptr<int>> vec;
    std::function<void()> f;
};

int main()
{
    std::vector<Foo> vec;
    vec.reserve(10);
}