Swift repl / LLDB printing horror

repl.txt

➜  val git:(interpreter) ✗ swift repl
Welcome to Apple Swift version 5.7.2 (swiftlang-5.7.2.135.5 clang-1400.0.29.51).
Type :help for assistance.

  1> let x = [[1], [2, 3]]
x: [[Int]] = 2 values {
  [0] = 1 value {
    [0] = 1
  }
  [1] = 2 values {
    [0] = 2
    [1] = 3
  }
}
  2> x.joined()
$R0: FlattenSequence<[[Int]]> = {
  _base = 2 values {
    [0] = 1 value {
      [0] = 1
    }
    [1] = 2 values {
      [0] = 2
      [1] = 3
    }
  }
}
  3> Array(x.joined())
$R1: [FlattenSequence<[[Int]]>.Element] = 3 values {
  [0] = 1
  [1] = 2
  [2] = 3
}
  4> let y = Array(x.joined())
y: [FlattenSequence<[[Int]]>.Element] = 3 values {
  [0] = 1
  [1] = 2
  [2] = 3
}
  5> print(y)
[1, 2, 3]
  6> print(type(of: y))
Array<Int>
  7>