Avoidig leaks when using setjmp/longjmp

setjmp_unique_ptr.cpp

//g++ -std=c++11 setjmp_unique_ptr.cpp -o demo

#include <cstdio>
#include <memory>
#include <csetjmp>

struct Test {
    Test(){
        std::fputs("Created Test.\n", stdout);
    }
    ~Test(){
        std::fputs("Destroyed Test.\n", stdout);
    }
};

int main(){
    
    // Declare your smart pointers before the first setjmp,
    // and set them where you would normally initialize them.
    std::unique_ptr<Test> TestHolder(nullptr);
    
    std::jmp_buf f;
    if(setjmp(f)){return 0;}
    
    TestHolder.reset(new Test());
    
    longjmp(f, 1);

}