Странное выполнение программы для, казалось бы, эквивалентного кода

#include <vector>
#include <stdarg.h>
#include <iostream>
 
using std::cout;
using std::endl;
 
size_t countOfParameters = 3, countOfFunctions = 1;
 
std::vector<double(*)(const std::vector<double>& x)> f;
std::vector<std::vector<double(*)(const std::vector<double>& x)>> d;
void SetFunctions(double(*f1)(const std::vector<double>&), ...)
{
    double(** v)(const std::vector<double>&) = &f1;
    for (size_t i = 0; i < countOfFunctions; i++)
        f[i] = *v++;
    for (size_t i = 0; i < countOfFunctions; i++)
        for (size_t j = 0; j < countOfParameters; j++)
            d[i][j] = *v++;
}
template<typename ...Args>
void Init(Args...args)
{
    f.resize(countOfFunctions);
    d.resize(countOfFunctions);
    for (auto i = d.begin(); i < d.end(); ++i)
        i->resize(countOfParameters);
    SetFunctions(args...);
}
 
int main()
{
#if 1
    double(*f0)(const std::vector<double>&) = [](const std::vector<double>&v)->double {return v[0]+v[1]+2*v[2]; };
    double(*d1)(const std::vector<double>&) = [](const std::vector<double>&)->double {return 1; };
    double(*d2)(const std::vector<double>&) = [](const std::vector<double>&)->double {return 1; };
    double(*d3)(const std::vector<double>&) = [](const std::vector<double>&)->double {return 2; };
    Init(f0, d1, d2, d3);
#else
    Init(
        [](const std::vector<double>& v)->double {return v[0] + v[1] + 2 * v[2]; },
        [](const std::vector<double>&)->double {return 1; },
        [](const std::vector<double>&)->double {return 1; },
        [](const std::vector<double>&)->double {return 2; }
    );
#endif
    std::vector<double> x;
    x.push_back(2);
    x.push_back(2);
    x.push_back(2);
    cout << f[0](x) << endl << d[0][0](x) << endl << d[0][1](x) << endl << d[0][2](x) << endl;
 
   
    system("pause");
    return 0;
}