Program: 93315
Project: 93315
Buggy source:
/** 
 * Heuristic to determine from attributes if a way is likely to be an area. Precondition for this call is that the first and last node of a way are the same, so that this method should only return false if it is known that the feature should not be an area even if the geometry is a polygon.  Determining what is an area is neigh impossible in OSM, this method inspects tag elements to give a likely answer. See http://wiki.openstreetmap.org/wiki/The_Future_of_Areas and http://wiki.openstreetmap.org/wiki/Way
 * @param way the way (which is assumed to be closed and have enough nodes to be an area)
 * @return true if tags indicate this is an area, otherwise false.
 */
public static boolean isArea(Way way){
  boolean result=true;
  if (way.getTags() != null) {
    for (    Tag tag : way.getTags()) {
      String key=tag.getKey().toLowerCase(Locale.ENGLISH);
      String value=tag.getValue().toLowerCase(Locale.ENGLISH);
      if ("String_Node_Str".equals(key)) {
        if (("String_Node_Str").equals(value) || ("String_Node_Str").equals(value) || ("String_Node_Str").equals(value)) {
          return true;
        }
        if (("String_Node_Str").equals(value) || ("String_Node_Str").equals(value) || ("String_Node_Str").equals(value)) {
          return false;
        }
      }
      if ("String_Node_Str".equals(key) || "String_Node_Str".equals(key)) {
        result=false;
      }
      if ("String_Node_Str".equals(key)) {
        if ("String_Node_Str".equals(value) || "String_Node_Str".equals(value) || "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)) {
          return false;
        }
        return true;
      }
    }
  }
  return result;
}

Fixed version (ground truth):
/** 
 * Heuristic to determine from attributes if a way is likely to be an area. Precondition for this call is that the first and last node of a way are the same, so that this method should only return false if it is known that the feature should not be an area even if the geometry is a polygon. Determining what is an area is neigh impossible in OSM, this method inspects tag elements to give a likely answer. See http://wiki.openstreetmap.org/wiki/The_Future_of_Areas and http://wiki.openstreetmap.org/wiki/Way
 * @param way the way (which is assumed to be closed and have enough nodes to be an area)
 * @return true if tags indicate this is an area, otherwise false.
 */
public static boolean isArea(Way way){
  boolean result=true;
  if (way.getTags() != null) {
    for (    Tag tag : way.getTags()) {
      String key=tag.getKey().toLowerCase(Locale.ENGLISH);
      String value=tag.getValue().toLowerCase(Locale.ENGLISH);
      if ("String_Node_Str".equals(key)) {
        if (("String_Node_Str").equals(value) || ("String_Node_Str").equals(value) || ("String_Node_Str").equals(value)) {
          return true;
        }
        if (("String_Node_Str").equals(value) || ("String_Node_Str").equals(value) || ("String_Node_Str").equals(value)) {
          return false;
        }
      }
      if ("String_Node_Str".equals(key) || "String_Node_Str".equals(key)) {
        result=false;
      }
      if ("String_Node_Str".equals(key)) {
        if ("String_Node_Str".equals(value) || "String_Node_Str".equals(value) || "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)|| "String_Node_Str".equals(value)) {
          result=false;
        }
      }
    }
  }
  return result;
}