Named Tuple binding from IArray.unapplySeq pattern can't select fields.

[bishabosha]

Compiler version

3.6.2-RC3

Minimized code

//> using options -experimental -language:experimental.namedTuples
val dirs = IArray(
  (dx = 0, dy = 1), // up
  (dx = 1, dy = 0), // right
  (dx = 0, dy = -1), // down
  (dx = -1, dy = 0), // left
)

val IArray(Up @ _, _, _, _) = dirs

def Test = println(Up.dx)

Output

-- [E008] Not Found Error: -----------------------------------------------------
10 |def Test = println(Up.dx)
   |                   ^^^^^
   |value dx is not a member of Array.UnapplySeqWrapper[? <: (dx : Int, dy : Int)]#T
1 error found

Expectation

selection should work, like it does if the pattern were Array.unapplySeq or Seq.unapplySeq