anchor.diff:      unlink(P1),
       unlink(P2),
       catch exit(P1, kill),
  -    catch exit(P2, kill).
  +    catch exit(P2, kill),
  +    wait_until_dead(P1),
  +    wait_until_dead(P2).
   
   async_fold_config() ->
       [
  
positive.code:                      ]}
      ].
  
  -endif.
  
negative.code:              unlink(P1),
               unlink(P2),
               catch exit(P1, kill),
               catch exit(P2, kill),
               wait_until_dead(P1),
               wait_until_dead(P2)
       end,
       [
        fun(_) ->
  