message: re-fix exitCode
diff: @@ -2399,11 +2399,17 @@ export function exitCode<E, A>(f?: (_: Exit<E, A>) => void) {
  const fiber = runUnsafeSync(
  fork(
  + onInterruptedExit_(
  chain_(result(_), (ex) =>
  chain_(
  sync(() => complete(ex)),
  () => completed(ex)
  )
  + ),
  + (i) =>
  + sync(() => {
  + complete(i)
  + })
  )
  )
  )
  