How to call destructor before free without dropping @nogc?

[Bienlein]

This works, vit. Thanks! I thought it wouldn't, because your code 
still makes use of embrace. But it somehow worked, although I 
don't understand why ... ;-).

I also added a constructor using the same approach as your 
destructor and this also worked:

      this(int otherNum) @nogc {
          this.num = otherNum;
          debug writeln("this: ", this.num);
      }

@evilrat: Will try what you suggested after work today. Too busy 
now.