Program: 905
Project: 905
Buggy source:
/** 
 * Create a BiomeManager from known state such as a world save, that already contains a mapping between Biome URIs and their short ids.
 * @param knownBiomeIdMap A mapping between Biome URIs (combination of module id + biome id) andtheir short ids that are applicable to this world save.
 */
public BiomeManager(ModuleEnvironment moduleEnvironment,Map<String,Short> knownBiomeIdMap){
  for (  Class<?> biomeRegistrator : moduleEnvironment.getSubtypesOf(BiomeRegistrator.class)) {
    BiomeRegistrator registrator;
    try {
      registrator=(BiomeRegistrator)biomeRegistrator.newInstance();
    }
 catch (    InstantiationException|IllegalAccessException e) {
      logger.error("String_Node_Str",biomeRegistrator,e);
      continue;
    }
    registrator.registerBiomes(this);
  }
  BiMap<Short,Biome> currentIdMap=HashBiMap.create(biomeShortIdMap);
  biomeShortIdMap.clear();
  registerBiome(UnknownBiome.INSTANCE);
  for (  Map.Entry<String,Short> entry : knownBiomeIdMap.entrySet()) {
    if (entry.getKey().equals(getUnknownBiome().getId()))     continue;
    Biome biome=biomeIdMap.get(entry.getKey());
    if (biome == null) {
      throw new IllegalStateException("String_Node_Str" + entry.getKey() + "String_Node_Str"+ "String_Node_Str");
    }
    if (biomeShortIdMap.put(entry.getValue(),biome) != null) {
      throw new IllegalStateException("String_Node_Str" + entry.getValue() + "String_Node_Str"+ "String_Node_Str"+ biome.getId()+ "String_Node_Str");
    }
    logger.info("String_Node_Str",entry.getKey(),entry.getValue());
    currentIdMap.values().remove(biome);
  }
  for (  Biome biome : currentIdMap.values()) {
    short freeBiomeId=getFreeBiomeId();
    biomeShortIdMap.put(freeBiomeId,biome);
    logger.info("String_Node_Str",biome.getId(),freeBiomeId);
  }
}

Fixed version (ground truth):
/** 
 * Create a BiomeManager from known state such as a world save, that already contains a mapping between Biome URIs and their short ids.
 * @param knownBiomeIdMap A mapping between Biome URIs (combination of module id + biome id) andtheir short ids that are applicable to this world save.
 */
public BiomeManager(ModuleEnvironment moduleEnvironment,Map<String,Short> knownBiomeIdMap){
  for (  Class<?> biomeRegistrator : moduleEnvironment.getSubtypesOf(BiomeRegistrator.class)) {
    BiomeRegistrator registrator;
    try {
      registrator=(BiomeRegistrator)biomeRegistrator.newInstance();
    }
 catch (    InstantiationException|IllegalAccessException e) {
      logger.error("String_Node_Str",biomeRegistrator,e);
      continue;
    }
    registrator.registerBiomes(this);
  }
  BiMap<Short,Biome> currentIdMap=HashBiMap.create(biomeShortIdMap);
  biomeShortIdMap.clear();
  registerBiome(UnknownBiome.INSTANCE);
  for (  Map.Entry<String,Short> entry : knownBiomeIdMap.entrySet()) {
    if (entry.getKey().equals(getUnknownBiome().getId())) {
      continue;
    }
    Biome biome=biomeIdMap.get(entry.getKey());
    if (biome == null) {
      throw new IllegalStateException("String_Node_Str" + entry.getKey() + "String_Node_Str"+ "String_Node_Str");
    }
    if (biomeShortIdMap.put(entry.getValue(),biome) != null) {
      throw new IllegalStateException("String_Node_Str" + entry.getValue() + "String_Node_Str"+ "String_Node_Str"+ biome.getId()+ "String_Node_Str");
    }
    logger.info("String_Node_Str",entry.getKey(),entry.getValue());
    currentIdMap.values().remove(biome);
  }
  for (  Biome biome : currentIdMap.values()) {
    short freeBiomeId=getFreeBiomeId();
    biomeShortIdMap.put(freeBiomeId,biome);
    logger.info("String_Node_Str",biome.getId(),freeBiomeId);
  }
}