#include <functional>   // for function
#include <memory>       // for unique_ptr
#include <utility>      // for move

std::function<int()> makeLambda(std::unique_ptr<int> ptr)
{
    return [p = move(ptr)] { return *p; };
}

int main()
{
    // Works
    auto function1 = [p = std::make_unique<int>(10)] { return *p; };

    // Does not work
    auto function2 = makeLambda(std::make_unique<int>(10));
}