`dels` is always zero here:
---
unittest
{
    static int dels;
    static struct S { ~this(){ ++dels; } }
    static struct S2 { S[3] s; }

    class A { S s; }
    dels = 0; { scoped!A(); }
    assert(dels == 1);

    class B { S[2] s; }
    dels = 0; { scoped!B(); }
    assert(dels == 2);

    class C { S2[2] s; }
    dels = 0; { scoped!C(); }
    assert(dels == 6);

    class D: A { S2[2] s; }
    dels = 0; { scoped!D(); }
    assert(dels == 1+6);
}
---