C+- Recursivity error

[Leonardo16AM]

The recursivity fails due the variables created in each step. Aparently the context of the variables created in the recursivity affects the parent context.

This case breaks the code:

/run def int fib(int n){
    int p1=n-1;
    int p2=n-2;
    if(n==0|n==1){return 1;}
    if(n<0){return 0;}
    int f1=fib(p1);
    int f2=fib(p2);
    notify(p1+" ; "+p2);
    notify(f1+" _ "+f2);
    return f1+f2;
}
/run notify(fib(2));