Program: 161923
Project: 161923
Buggy source:
public void replaceAll(){
  Path tfpath=cfg.getTfPath();
  Path customBackupPath=tfpath.resolve("String_Node_Str");
  Path customPath=tfpath.resolve("String_Node_Str");
  Path configBackupPath=tfpath.resolve("String_Node_Str");
  Path configPath=tfpath.resolve("String_Node_Str");
  Path localCustomPath=Paths.get("String_Node_Str");
  if (!Files.exists(configBackupPath)) {
    try {
      log.fine("String_Node_Str");
      configPath.toFile().setWritable(true);
      Files.move(configPath,configBackupPath);
      Files.createDirectories(configPath);
      copy(Paths.get("String_Node_Str"),configPath);
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
      return;
    }
  }
  if (!Files.exists(customBackupPath)) {
    try {
      log.fine("String_Node_Str");
      customPath.toFile().setWritable(true);
      Files.move(customPath,customBackupPath);
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
      return;
    }
    try {
      log.fine("String_Node_Str");
      Path resourcePath=tfpath.resolve("String_Node_Str");
      Path scriptsPath=tfpath.resolve("String_Node_Str");
      Files.createDirectories(resourcePath);
      Files.createDirectories(scriptsPath);
      String hudName=cfg.getHud();
      if (!hudName.equals("String_Node_Str")) {
        copy(Paths.get("String_Node_Str",hudName,"String_Node_Str"),resourcePath);
        copy(Paths.get("String_Node_Str",hudName,"String_Node_Str"),scriptsPath);
      }
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
    }
    Path skyboxPath=tfpath.resolve("String_Node_Str");
    try {
      String sky=cfg.getSkybox();
      if (sky != null && !sky.isEmpty() && !sky.equals(Key.Skybox.defValue())) {
        log.fine("String_Node_Str");
        Files.createDirectories(skyboxPath);
        replaceSkybox();
      }
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
      try {
        delete(skyboxPath);
        log.fine("String_Node_Str");
      }
 catch (      IOException e1) {
        log.log(Level.INFO,"String_Node_Str",e);
      }
    }
    if (customPathList != null) {
      log.fine("String_Node_Str");
      for (      CustomPath cp : customPathList.getList()) {
        if (cp.isSelected()) {
          Path source;
          if (cp.getPath().startsWith(customPath)) {
            source=customBackupPath.resolve(cp.getPath().getFileName());
          }
 else           if (cp.getPath().startsWith(localCustomPath)) {
            source=localCustomPath.resolve(cp.getPath().getFileName());
          }
 else {
            log.info("String_Node_Str" + cp.getPath());
            continue;
          }
          if (Files.exists(source)) {
            if (Files.isDirectory(source)) {
              try {
                Path dest=customPath.resolve(source.getFileName());
                copy(source,dest);
              }
 catch (              IOException e) {
                log.log(Level.INFO,"String_Node_Str" + source.getFileName(),e);
              }
            }
 else             if (source.getFileName().toString().endsWith("String_Node_Str")) {
              try {
                Path dest=customPath.resolve(source.getFileName());
                Files.copy(source,dest);
              }
 catch (              IOException e) {
                log.log(Level.INFO,"String_Node_Str" + source.getFileName(),e);
              }
            }
 else {
              log.info("String_Node_Str" + source.getFileName());
            }
          }
 else {
            log.info("String_Node_Str" + source);
          }
        }
      }
    }
  }
}

Fixed version (ground truth):
public void replaceAll() throws LawenaException {
  Path tfpath=cfg.getTfPath();
  Path customBackupPath=tfpath.resolve("String_Node_Str");
  Path customPath=tfpath.resolve("String_Node_Str");
  Path configBackupPath=tfpath.resolve("String_Node_Str");
  Path configPath=tfpath.resolve("String_Node_Str");
  Path localCustomPath=Paths.get("String_Node_Str");
  if (!Files.exists(configBackupPath)) {
    try {
      log.fine("String_Node_Str");
      configPath.toFile().setWritable(true);
      Files.move(configPath,configBackupPath);
      Files.createDirectories(configPath);
      copy(Paths.get("String_Node_Str"),configPath);
    }
 catch (    IOException e) {
      log.log(Level.WARNING,"String_Node_Str",e);
      throw new LawenaException("String_Node_Str",e);
    }
  }
  if (!Files.exists(customBackupPath)) {
    try {
      log.fine("String_Node_Str");
      customPath.toFile().setWritable(true);
      Files.move(customPath,customBackupPath);
    }
 catch (    IOException e) {
      log.log(Level.WARNING,"String_Node_Str",e);
      throw new LawenaException("String_Node_Str",e);
    }
    try {
      log.fine("String_Node_Str");
      Path resourcePath=tfpath.resolve("String_Node_Str");
      Path scriptsPath=tfpath.resolve("String_Node_Str");
      Files.createDirectories(resourcePath);
      Files.createDirectories(scriptsPath);
      String hudName=cfg.getHud();
      if (!hudName.equals("String_Node_Str")) {
        copy(Paths.get("String_Node_Str",hudName,"String_Node_Str"),resourcePath);
        copy(Paths.get("String_Node_Str",hudName,"String_Node_Str"),scriptsPath);
      }
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
      throw new LawenaException("String_Node_Str",e);
    }
    Path skyboxPath=tfpath.resolve("String_Node_Str");
    try {
      String sky=cfg.getSkybox();
      if (sky != null && !sky.isEmpty() && !sky.equals(Key.Skybox.defValue())) {
        log.fine("String_Node_Str");
        Files.createDirectories(skyboxPath);
        replaceSkybox();
      }
    }
 catch (    IOException e) {
      log.log(Level.WARNING,"String_Node_Str",e);
      try {
        delete(skyboxPath);
        log.fine("String_Node_Str");
      }
 catch (      IOException e1) {
        log.log(Level.WARNING,"String_Node_Str",e1);
      }
      throw new LawenaException("String_Node_Str",e);
    }
    if (customPathList != null) {
      log.fine("String_Node_Str");
      for (      CustomPath cp : customPathList.getList()) {
        if (cp.isSelected()) {
          Path source;
          if (cp.getPath().startsWith(customPath)) {
            source=customBackupPath.resolve(cp.getPath().getFileName());
          }
 else           if (cp.getPath().startsWith(localCustomPath)) {
            source=localCustomPath.resolve(cp.getPath().getFileName());
          }
 else {
            log.info("String_Node_Str" + cp.getPath());
            continue;
          }
          if (Files.exists(source)) {
            if (Files.isDirectory(source)) {
              try {
                Path dest=customPath.resolve(source.getFileName());
                copy(source,dest);
              }
 catch (              IOException e) {
                log.log(Level.INFO,"String_Node_Str" + source.getFileName(),e);
              }
            }
 else             if (source.getFileName().toString().endsWith("String_Node_Str")) {
              try {
                Path dest=customPath.resolve(source.getFileName());
                Files.copy(source,dest);
              }
 catch (              IOException e) {
                log.log(Level.INFO,"String_Node_Str" + source.getFileName(),e);
              }
            }
 else {
              log.info("String_Node_Str" + source.getFileName());
            }
          }
 else {
            log.info("String_Node_Str" + source);
          }
        }
      }
    }
  }
}