@tailrec gets short-circuited

Failrec.scala

import scala.annotation.tailrec

object Failrec {
  def main(args: Array[String]): Unit = run()

  def run() =
    {
      @tailrec def rec(count: Long): Boolean =
        if (count == 0) true else rec(count - 1)

      rec(1000000L)
    } && true
}