Using checkation=context results in another temporary which gets destroyed but not constructed by any declared constructor.

Reduced test case:

struct RefCounted
{
    static int instances;

    this(bool data)
    {
        instances++;
    }

    this(this)
    {
        instances++;
    }

    ~this()
    {
        instances--;
    }

    bool opEquals(RefCounted)
    {
        return true;
    }
}

{
    auto a = RefCounted(true);
    assert(a == a);
}

assert(RefCounted.instances == 0);