@nogc pure nothrow void mod(int *v)
{
    scope(exit)
    {
        scope(exit)
        {
            *v = 1;
        }

        *v = 2;
    }
}

void main()
{
    @nogc pure nothrow int n = 0;
    mod(&n);

    import std.stdio;
    writefln("n = %d", n);
}