Re: skinny delegates

[kinke via Digitalmars-d]

Leaking may be an issue. This currently works:

```
static const(int)* global;
auto foo(const int param)
{
    return { global = &param; return param + 10; };
}

void main()
{
    {
        int arg = 42;
        auto dg = foo(42);
        auto r = dg();
        assert(r == 52);
    }
    assert(*global == 42);
}
```

`global` would be dangling as soon as the delegate `dg` goes out 
of scope.