Test size=23 unrelated/redefined unapplies

Just recording the current behaviour, to confirm the next commit doesn't
regress them.

test/files/neg/case-class-23-unrelated-unapply.check

@@ -0,0 +1,7 @@
+case-class-23-unrelated-unapply.scala:42: error: too many arguments for unapply pattern, maximum = 22
+  val TwentyThree(a, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b) = x
+      ^
+case-class-23-unrelated-unapply.scala:45: error: too many arguments for unapply pattern, maximum = 22
+  val TwentyThree(a2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b2) = arr
+      ^
+2 errors

test/files/neg/case-class-23-unrelated-unapply.scala

@@ -0,0 +1,47 @@
+case class TwentyThree(
+  _1: Int,
+  _2: Int,
+  _3: Int,
+  _4: Int,
+  _5: Int,
+  _6: Int,
+  _7: Int,
+  _8: Int,
+  _9: Int,
+  _10: Int,
+  _11: Int,
+  _12: Int,
+  _13: Int,
+  _14: Int,
+  _15: Int,
+  _16: Int,
+  _17: Int,
+  _18: Int,
+  _19: Int,
+  _20: Int,
+  _21: Int,
+  _22: Int,
+  _23: Int
+)
+
+object TwentyThree {
+  def unapply(a: Array[Int]): Option[TwentyThree] = {
+    Option.when(a.length == 23) {
+      TwentyThree(
+        a(0), a(1), a(2), a(3), a(4), a(5), a(6), a(7), a(8), a(9),
+        a(10), a(11), a(12), a(13), a(14), a(15), a(16), a(17), a(18), a(19),
+        a(20), a(21), a(22),
+      )
+    }
+  }
+}
+
+// This is borked.. but I'm fairly certain it's borked since before I started meddling with it..
+object Test extends App {
+  val x = new TwentyThree(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
+  val TwentyThree(a, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b) = x
+  println((a, b))
+  val arr = Array(0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
+  val TwentyThree(a2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b2) = arr
+  println((a2, b2))
+}

test/files/run/case-class-23-redefined-unapply.check

@@ -0,0 +1 @@
+(1,3)

test/files/run/case-class-23-redefined-unapply.scala

@@ -0,0 +1,35 @@
+case class TwentyThree(
+  _1: Int,
+  _2: Int,
+  _3: Int,
+  _4: Int,
+  _5: Int,
+  _6: Int,
+  _7: Int,
+  _8: Int,
+  _9: Int,
+  _10: Int,
+  _11: Int,
+  _12: Int,
+  _13: Int,
+  _14: Int,
+  _15: Int,
+  _16: Int,
+  _17: Int,
+  _18: Int,
+  _19: Int,
+  _20: Int,
+  _21: Int,
+  _22: Int,
+  _23: Int
+)
+
+object TwentyThree {
+  def unapply(x: TwentyThree): Some[(Int, Int, Int)] = Some(x._1, x._2, x._3)
+}
+
+object Test extends App {
+  val x = new TwentyThree(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
+  val TwentyThree(a, 2, b) = x
+  println((a, b))
+}