def fromCompletionStage[A](thunk: => CompletionStage[A]): Task[A] =
    Task.uninterruptibleMask { restore =>
      Task.effect(thunk).flatMap { cs =>
        Task.effectSuspendTotalWith { (p, _) =>
          val cf = cs.toCompletableFuture
          if (cf.isDone) {
            unwrapDone(p.fatal)(cf)
          } else {
            restore(Task.effectAsyncInterrupt[A] { cb =>
              val _ = cs.handle[Unit] { (v: A, t: Throwable) =>
                val io = Option(t).fold[Task[A]](Task.succeed(v)) { t =>
                  catchFromGet(p.fatal).lift(t).getOrElse(Task.die(t))
                }
                cb(io)
              }
              Left(UIO(cf.cancel(false)))
            }).onInterrupt(UIO(cf.cancel(false)))
          }
        }
      }
    }