Program: 33716
Project: 33716
Buggy source:
/** 
 * Prints a lot of information about the Location the Hero is in.
 */
private static void printCurrentLocationInformation(){
  final int WIDTH=20;
  GameState gameState=Game.getGameState();
  Point heroPosition=gameState.getHeroPosition();
  Location location=gameState.getWorld().getLocation(heroPosition);
  StringBuilder sb=new StringBuilder();
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(heroPosition.toString()).append('\n');
  sb.append(Utils.padString("String_Node_Str" + location.getCreatureCount() + "String_Node_Str",WIDTH)).append('\n');
  for (  Creature creature : location.getCreatures()) {
    sb.append(Utils.padString("String_Node_Str" + creature.getName(),WIDTH));
    sb.append(creature.getVisibility().toPercentage()).append('\n');
  }
  if (!location.getItemList().isEmpty()) {
    sb.append(Utils.padString("String_Node_Str" + location.getItemList().size() + "String_Node_Str",WIDTH)).append('\n');
    for (    Item item : location.getItemList()) {
      sb.append(Utils.padString("String_Node_Str" + item.getQualifiedName(),WIDTH));
      sb.append(item.getVisibility().toPercentage()).append('\n');
    }
  }
 else {
    sb.append("String_Node_Str");
  }
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(location.getLuminosity().toPercentage()).append('\n');
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(location.getLightPermittivity()).append('\n');
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(location.getBlockedEntrances()).append('\n');
  IO.writeString(sb.toString());
}

Fixed version (ground truth):
/** 
 * Prints a lot of information about the Location the Hero is in.
 */
private static void printCurrentLocationInformation(){
  final int WIDTH=40;
  GameState gameState=Game.getGameState();
  Point heroPosition=gameState.getHeroPosition();
  Location location=gameState.getWorld().getLocation(heroPosition);
  StringBuilder sb=new StringBuilder();
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(heroPosition.toString()).append('\n');
  sb.append(Utils.padString("String_Node_Str" + location.getCreatureCount() + "String_Node_Str",WIDTH)).append('\n');
  for (  Creature creature : location.getCreatures()) {
    sb.append(Utils.padString("String_Node_Str" + creature.getName(),WIDTH));
    sb.append(creature.getVisibility().toPercentage()).append('\n');
  }
  if (!location.getItemList().isEmpty()) {
    sb.append(Utils.padString("String_Node_Str" + location.getItemList().size() + "String_Node_Str",WIDTH)).append('\n');
    for (    Item item : location.getItemList()) {
      sb.append(Utils.padString("String_Node_Str" + item.getQualifiedName(),WIDTH));
      sb.append(item.getVisibility().toPercentage()).append('\n');
    }
  }
 else {
    sb.append("String_Node_Str");
  }
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(location.getLuminosity().toPercentage()).append('\n');
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(location.getLightPermittivity()).append('\n');
  sb.append(Utils.padString("String_Node_Str",WIDTH)).append(location.getBlockedEntrances()).append('\n');
  IO.writeString(sb.toString());
}