Program: 134257
Project: 134257
Buggy source:
@Override public void processCommand(ICommandSender commandSender,String[] args){
  if (args.length < 2)   throw new WrongUsageException("String_Node_Str");
  if (args[0].equals("String_Node_Str")) {
    Set<BiomeGenBase> biomes=BiomeSelector.gatherAllBiomes();
    boolean didFindBiome=false;
    String[] biomeNameArgs=new String[args.length - 1];
    System.arraycopy(args,1,biomeNameArgs,0,biomeNameArgs.length);
    String biomeName=Strings.join(biomeNameArgs,"String_Node_Str");
    for (    BiomeGenBase biomeGenBase : biomes) {
      if (biomeGenBase.biomeName.equals(biomeName)) {
        BiomeDictionary.Type[] types=BiomeDictionary.getTypesForBiome(biomeGenBase);
        String[] typeNames=new String[types.length];
        for (int i=0; i < types.length; i++)         typeNames[i]=IvGsonHelper.serializedName(types[i]);
        commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",biomeName,Strings.join(typeNames,"String_Node_Str")));
        didFindBiome=true;
        break;
      }
    }
    if (!didFindBiome)     commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",biomeName));
  }
 else   if (args[0].equals("String_Node_Str")) {
    BiomeDictionary.Type type=IvGsonHelper.enumForNameIgnoreCase(args[1],BiomeDictionary.Type.values());
    if (type != null) {
      BiomeGenBase[] biomes=BiomeDictionary.getBiomesForType(type);
      String[] biomeNames=new String[biomes.length];
      for (int i=0; i < biomes.length; i++)       biomeNames[i]=biomes[i].biomeName;
      commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",args[1],Strings.join(biomeNames,"String_Node_Str")));
    }
 else     commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",args[1]));
  }
 else   throw new WrongUsageException("String_Node_Str");
}

Fixed version (ground truth):
@Override public void processCommand(ICommandSender commandSender,String[] args){
  if (args.length < 2)   throw new WrongUsageException("String_Node_Str");
  if (args[0].equals("String_Node_Str")) {
    Set<BiomeGenBase> biomes=BiomeSelector.gatherAllBiomes();
    boolean didFindBiome=false;
    String[] biomeNameArgs=new String[args.length - 1];
    System.arraycopy(args,1,biomeNameArgs,0,biomeNameArgs.length);
    String biomeName=Strings.join(biomeNameArgs,"String_Node_Str");
    for (    BiomeGenBase biomeGenBase : biomes) {
      if (biomeGenBase.biomeName.equals(biomeName)) {
        BiomeDictionary.Type[] types=BiomeDictionary.getTypesForBiome(biomeGenBase);
        String[] typeNames=new String[types.length];
        for (int i=0; i < types.length; i++)         typeNames[i]=IvGsonHelper.serializedName(types[i]);
        commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",biomeName,Strings.join(typeNames,"String_Node_Str")));
        didFindBiome=true;
        break;
      }
    }
    if (!didFindBiome)     commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",biomeName));
  }
 else   if (args[0].equals("String_Node_Str")) {
    BiomeDictionary.Type type=RCGsonHelper.enumForNameIgnoreCase(args[1],BiomeDictionary.Type.values());
    if (type != null) {
      BiomeGenBase[] biomes=BiomeDictionary.getBiomesForType(type);
      String[] biomeNames=new String[biomes.length];
      for (int i=0; i < biomes.length; i++)       biomeNames[i]=biomes[i].biomeName;
      commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",args[1],Strings.join(biomeNames,"String_Node_Str")));
    }
 else     commandSender.addChatMessage(new ChatComponentTranslation("String_Node_Str",args[1]));
  }
 else   throw new WrongUsageException("String_Node_Str");
}