File: t8738.scala

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scala 2.11.12-4
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object Test {
  def check(a: Range, b: Range) = (a == b) == (a.toList == b.toList)
  def main(args: Array[String]) {
    val lo = -2 to 2
    val hi = lo
    val step = List(-6,-2,-1,1,2,6)
    for (i <- lo; j <- hi; n <- step; k <- lo; l <- hi; m <- step) {
      assert(
        check(i until j by n, k until l by m) &&
        check(i until j by n, k to l by m) &&
        check(i to j by n, k until l by m) &&
        check(i to j by n, k to l by m)
      )
    }
  }
}