Program: 27618
Project: 27618
Buggy source:
@Override public boolean call(CommandSource source,String arguments,List<String> parents) throws CommandException {
  CommandHandler handler=(CommandHandler)MinecraftServer.getServer().getCommandManager();
  final ICommandSender mcSender=source instanceof ICommandSender ? (ICommandSender)source : new WrapperICommandSender(source);
  final String[] args=arguments.split("String_Node_Str");
  int usernameIndex=handler.getUsernameIndex(this.command,args);
  int successCount=0;
  if (testPermission(source)) {
    net.minecraftforge.event.CommandEvent event=new net.minecraftforge.event.CommandEvent(this.command,mcSender,args);
    if (net.minecraftforge.common.MinecraftForge.EVENT_BUS.post(event)) {
      if (event.exception != null) {
        com.google.common.base.Throwables.propagateIfPossible(event.exception);
      }
      return false;
    }
    if (usernameIndex > -1) {
      @SuppressWarnings("String_Node_Str") List<Entity> list=PlayerSelector.matchEntities(mcSender,args[usernameIndex],Entity.class);
      String previousNameVal=args[usernameIndex];
      mcSender.setCommandStat(CommandResultStats.Type.AFFECTED_ENTITIES,list.size());
      for (      Entity entity : list) {
        args[usernameIndex]=entity.getUniqueID().toString();
        if (handler.tryExecute(mcSender,args,this.command,arguments)) {
          ++successCount;
        }
      }
      args[usernameIndex]=previousNameVal;
    }
 else {
      mcSender.setCommandStat(CommandResultStats.Type.AFFECTED_ENTITIES,1);
      if (handler.tryExecute(mcSender,args,this.command,arguments)) {
        ++successCount;
      }
    }
  }
 else {
    source.sendMessage(Texts.builder(SpongeMod.instance.getGame().getRegistry().getTranslationById(TRANSLATION_NO_PERMISSION).get(),new Object[0]).color(TextColors.RED).build());
  }
  mcSender.setCommandStat(CommandResultStats.Type.SUCCESS_COUNT,successCount);
  return successCount > 0;
}

Fixed version (ground truth):
@Override public boolean call(CommandSource source,String arguments,List<String> parents) throws CommandException {
  CommandHandler handler=(CommandHandler)MinecraftServer.getServer().getCommandManager();
  final ICommandSender mcSender=source instanceof ICommandSender ? (ICommandSender)source : new WrapperICommandSender(source);
  final String[] args=splitArgs(arguments);
  int usernameIndex=handler.getUsernameIndex(this.command,args);
  int successCount=0;
  if (testPermission(source)) {
    net.minecraftforge.event.CommandEvent event=new net.minecraftforge.event.CommandEvent(this.command,mcSender,args);
    if (net.minecraftforge.common.MinecraftForge.EVENT_BUS.post(event)) {
      if (event.exception != null) {
        com.google.common.base.Throwables.propagateIfPossible(event.exception);
      }
      return false;
    }
    if (usernameIndex > -1) {
      @SuppressWarnings("String_Node_Str") List<Entity> list=PlayerSelector.matchEntities(mcSender,args[usernameIndex],Entity.class);
      String previousNameVal=args[usernameIndex];
      mcSender.setCommandStat(CommandResultStats.Type.AFFECTED_ENTITIES,list.size());
      for (      Entity entity : list) {
        args[usernameIndex]=entity.getUniqueID().toString();
        if (handler.tryExecute(mcSender,args,this.command,arguments)) {
          ++successCount;
        }
      }
      args[usernameIndex]=previousNameVal;
    }
 else {
      mcSender.setCommandStat(CommandResultStats.Type.AFFECTED_ENTITIES,1);
      if (handler.tryExecute(mcSender,args,this.command,arguments)) {
        ++successCount;
      }
    }
  }
 else {
    source.sendMessage(Texts.builder(SpongeMod.instance.getGame().getRegistry().getTranslationById(TRANSLATION_NO_PERMISSION).get(),new Object[0]).color(TextColors.RED).build());
  }
  mcSender.setCommandStat(CommandResultStats.Type.SUCCESS_COUNT,successCount);
  return successCount > 0;
}