unittest
{
    import std.variant;
    static struct S
    {
        int* p;
        ubyte[100] u;

        this(int a)
        {
            p = new int(a);
        }
    
        this(this)
        {
            p = new int(*p);
        }

        ~this()
        {
            p = null;
        }
    }
    Variant v = S(4);
    assert(v.peek!S.p !is null); // fails
}