// Minimal repro: string concatenation in a loop should yield "xxx"

static box Main {
  main(args) {
    local console = new ConsoleBox()
    local out = ""
    local i = 0
    local n = 3
    loop(i < n) {
      out = out + "x"
      i = i + 1
    }
    console.println(out)
    return 0
  }
}