Re: RCArray is unsafe

[Andrei Alexandrescu via Digitalmars-d]

On 3/4/15 12:55 AM, Ivan Timokhin wrote:

Excuse me if I miss something obvious, but:

     void main()
     {
         auto arr = RCArray!int([0]);
         foo(arr, arr[0]);
     }

     void foo(ref RCArray!int arr, ref int val)
     {
         {
             auto copy = arr; //arr's (and copy's) reference counts are both 2
             arr = RCArray!int([]); // There is another owner, so arr
                                    // forgets about the old payload
         } // Last owner of the array ('copy') gets destroyed and happily
           // frees the payload.
         val = 3; // Oops.
     }

That's a problem, thanks very much for pointing it out. -- Andrei