#include <cstdio>

using namespace std;

struct First
{
    First()
    {
        printf("first\n");
    }
} first;

template<class T>
T run_it = T{};

void not_used()
{
    struct Second
    {
        Second()
        {
            printf("second\n");
        }
    };
    Second t = run_it<Second>;
}

int main()
{
}

// GCC:
first
second

// Clang:
second
first