Program: 34219
Project: 34219
Buggy source:
@Override public void apply(Project project){
  String passphrase=getProjectProperty(CREDENTIALS_PASSPHRASE_PROPERTY,DEFAULT_PASSPHRASE,project);
  String credentialsFileName=deriveFileNameFromPassphrase(passphrase);
  CredentialsEncryptor credentialsEncryptor=CredentialsEncryptor.withPassphrase(CredentialsPlugin.DEFAULT_PASSPHRASE.toCharArray());
  File gradleUserHomeDir=project.getGradle().getGradleUserHomeDir();
  File credentialsFile=new File(gradleUserHomeDir,credentialsFileName);
  CredentialsPersistenceManager credentialsPersistenceManager=new CredentialsPersistenceManager(credentialsFile);
  CredentialsContainer credentialsContainer=new CredentialsContainer(credentialsEncryptor,credentialsPersistenceManager.readCredentials());
  project.getExtensions().getExtraProperties().set(CREDENTIALS_CONTAINER_PROPERTY,credentialsContainer);
  LOGGER.debug("String_Node_Str" + CREDENTIALS_CONTAINER_PROPERTY + "String_Node_Str");
  AddCredentialsTask addCredentials=project.getTasks().create(ADD_CREDENTIALS_TASK_NAME,AddCredentialsTask.class);
  addCredentials.setDescription("String_Node_Str");
  addCredentials.setGroup("String_Node_Str");
  addCredentials.setCredentialsEncryptor(credentialsEncryptor);
  addCredentials.setCredentialsPersistenceManager(credentialsPersistenceManager);
  LOGGER.debug(String.format("String_Node_Str",addCredentials.getName()));
  RemoveCredentialsTask removeCredentials=project.getTasks().create(REMOVE_CREDENTIALS_TASK_NAME,RemoveCredentialsTask.class);
  removeCredentials.setDescription("String_Node_Str");
  removeCredentials.setGroup("String_Node_Str");
  removeCredentials.setCredentialsPersistenceManager(credentialsPersistenceManager);
  LOGGER.debug(String.format("String_Node_Str",removeCredentials.getName()));
}

Fixed version (ground truth):
@Override public void apply(Project project){
  String passphrase=getProjectProperty(CREDENTIALS_PASSPHRASE_PROPERTY,DEFAULT_PASSPHRASE,project);
  String credentialsFileName=deriveFileNameFromPassphrase(passphrase);
  CredentialsEncryptor credentialsEncryptor=CredentialsEncryptor.withPassphrase(passphrase.toCharArray());
  File gradleUserHomeDir=project.getGradle().getGradleUserHomeDir();
  File credentialsFile=new File(gradleUserHomeDir,credentialsFileName);
  CredentialsPersistenceManager credentialsPersistenceManager=new CredentialsPersistenceManager(credentialsFile);
  CredentialsContainer credentialsContainer=new CredentialsContainer(credentialsEncryptor,credentialsPersistenceManager.readCredentials());
  project.getExtensions().getExtraProperties().set(CREDENTIALS_CONTAINER_PROPERTY,credentialsContainer);
  LOGGER.debug("String_Node_Str" + CREDENTIALS_CONTAINER_PROPERTY + "String_Node_Str");
  AddCredentialsTask addCredentials=project.getTasks().create(ADD_CREDENTIALS_TASK_NAME,AddCredentialsTask.class);
  addCredentials.setDescription("String_Node_Str");
  addCredentials.setGroup("String_Node_Str");
  addCredentials.setCredentialsEncryptor(credentialsEncryptor);
  addCredentials.setCredentialsPersistenceManager(credentialsPersistenceManager);
  LOGGER.debug(String.format("String_Node_Str",addCredentials.getName()));
  RemoveCredentialsTask removeCredentials=project.getTasks().create(REMOVE_CREDENTIALS_TASK_NAME,RemoveCredentialsTask.class);
  removeCredentials.setDescription("String_Node_Str");
  removeCredentials.setGroup("String_Node_Str");
  removeCredentials.setCredentialsPersistenceManager(credentialsPersistenceManager);
  LOGGER.debug(String.format("String_Node_Str",removeCredentials.getName()));
}