ScriptException.getLineNumber returns an inaccurate value

[lare96]

Scala version: 2.12.6 Java version: 8

I have a series of scripts that are evaluated with the Scala ScriptEngine like so

for (Script script : plugin.getScripts()) {
    try {
        engine.eval(script.getContents());
    } catch (ScriptException e) {
        throw new ScriptInterpretException(script, e);
    }
    ...
}

When an exception is thrown, the line number that it returns is inaccurate. For example, take this script

import io.luna.game.event.impl.ServerLaunchEvent
import io.luna.game.model.mob.Player

private val TICK_INTERVAL = 1500 // 15 mins

private val MESSAGES = Vector(
  "Luna is a Runescape private server for the #317 protocol.",
  "Luna can be found on GitHub under luna-rs/luna",
  "Change these messages in /plugins/world/announcements/announcements.scala",
  "Any bugs found using Luna should be reported to the GitHub page."
)

private val FILTER = (plr: Player) => plr.rights <= RIGHTS_ADMIN


on[ServerLaunchEvent] { msg =>
  world.scheduleForever(TICK_INTERVAL, error here!!!) { // error, line 21 
    world.players.
      filter(FILTER).
      foreach { _.sendMessage(pick(MESSAGES)) }
  }
}

getLineNumber should return 21 but instead it returns 221. In this instance, you could subtract 200 to get the line number but normally the value is unpredictable (ranges between 150-300). Could this be because the line number counter isn't being reset after each script evaluation? If so, is this the intended behavior?