gistfile1.d

struct S
{
    int value = 9999;

    void change()
    {
        value = 1;
    }
}

struct R
{
    S s;
}


int test()
{
    S s;
    s.change();
    assert(s.value == 1);       // succeeds

    R r;
    r.s.change();
    assert(r.s.value == 1);     // fails, value == 9999

    return 0;
}

enum _ = test();