Program: 63739
Project: 63739
Buggy source:
@Override public void processCommand(ICommandSender sender,String[] arguments){
  if (arguments.length <= 0)   throw new WrongUsageException(StringUtil.localize("String_Node_Str",this.getCommandUsage(sender)));
  if (arguments[0].matches("String_Node_Str"))   listModes(sender,arguments);
 else   if (arguments[0].matches("String_Node_Str"))   listModeInfo(sender,arguments);
 else   if (arguments[0].matches("String_Node_Str")) {
    if (arguments.length <= 1)     throw new WrongUsageException("String_Node_Str" + this.getCommandName() + "String_Node_Str");
    World world=getWorld(sender,arguments);
    String desired=arguments[arguments.length - 1];
    ITreekeepingMode mode=PluginArboriculture.treeInterface.getTreekeepingMode(desired);
    if (mode == null)     throw new CommandException(StringUtil.localize("String_Node_Str"),desired);
    PluginArboriculture.treeInterface.setTreekeepingMode(world,mode.getName());
    func_152373_a(sender,this,StringUtil.localize("String_Node_Str"),mode.getName());
  }
 else   if (arguments[0].matches("String_Node_Str")) {
    if (arguments.length <= 1)     throw new WrongUsageException("String_Node_Str" + this.getCommandName() + "String_Node_Str");
    saveStatistics(sender,arguments);
  }
 else   if (arguments[0].matches("String_Node_Str")) {
    sendChatMessage(sender,StringUtil.localize("String_Node_Str",this.getCommandName()));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
  }
}

Fixed version (ground truth):
@Override public void processCommand(ICommandSender sender,String[] arguments){
  if (arguments.length <= 0)   throw new WrongUsageException(StringUtil.localizeAndFormat("String_Node_Str",this.getCommandUsage(sender)));
  if (arguments[0].matches("String_Node_Str"))   listModes(sender,arguments);
 else   if (arguments[0].matches("String_Node_Str"))   listModeInfo(sender,arguments);
 else   if (arguments[0].matches("String_Node_Str")) {
    if (arguments.length <= 1)     throw new WrongUsageException("String_Node_Str" + this.getCommandName() + "String_Node_Str");
    World world=getWorld(sender,arguments);
    String desired=arguments[arguments.length - 1];
    ITreekeepingMode mode=PluginArboriculture.treeInterface.getTreekeepingMode(desired);
    if (mode == null)     throw new CommandException(StringUtil.localize("String_Node_Str"),desired);
    PluginArboriculture.treeInterface.setTreekeepingMode(world,mode.getName());
    func_152373_a(sender,this,StringUtil.localize("String_Node_Str"),mode.getName());
  }
 else   if (arguments[0].matches("String_Node_Str")) {
    if (arguments.length <= 1)     throw new WrongUsageException("String_Node_Str" + this.getCommandName() + "String_Node_Str");
    saveStatistics(sender,arguments);
  }
 else   if (arguments[0].matches("String_Node_Str")) {
    sendChatMessage(sender,StringUtil.localizeAndFormat("String_Node_Str",this.getCommandName()));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
    sendChatMessage(sender,StringUtil.localize("String_Node_Str"));
  }
}