Program: 32243
Project: 32243
Buggy source:
/** 
 * {@inheritDoc} 
 */
@Override public void execute() throws MojoExecutionException, MojoFailureException {
  try {
    checkUncommittedChanges();
    final String featureBranches=executeGitCommandReturn("String_Node_Str","String_Node_Str","String_Node_Str" + gitFlowConfig.getFeatureBranchPrefix() + "String_Node_Str");
    if (StringUtils.isBlank(featureBranches)) {
      throw new MojoFailureException("String_Node_Str");
    }
    final String[] branches=featureBranches.split("String_Node_Str");
    List<String> numberedList=new ArrayList<String>();
    StringBuilder str=new StringBuilder("String_Node_Str").append(LS);
    for (int i=0; i < branches.length; i++) {
      str.append((i + 1) + "String_Node_Str" + branches[i]+ LS);
      numberedList.add("String_Node_Str" + (i + 1));
    }
    str.append("String_Node_Str");
    String featureNumber=null;
    try {
      while (StringUtils.isBlank(featureNumber)) {
        featureNumber=prompter.prompt(str.toString(),numberedList);
      }
    }
 catch (    PrompterException e) {
      getLog().error(e);
    }
    String featureBranchName=null;
    if (featureNumber != null) {
      int num=Integer.parseInt(featureNumber);
      featureBranchName=branches[num - 1];
    }
    if (StringUtils.isBlank(featureBranchName)) {
      throw new MojoFailureException("String_Node_Str");
    }
    gitCheckout(featureBranchName);
    if (!skipTestProject) {
      mvnCleanTest();
    }
    gitCheckout(gitFlowConfig.getDevelopmentBranch());
    gitMergeNoff(featureBranchName);
    final String currentVersion=getCurrentProjectVersion();
    final String featureName=featureBranchName.replaceFirst(gitFlowConfig.getFeatureBranchPrefix(),"String_Node_Str");
    if (currentVersion.contains("String_Node_Str" + featureName)) {
      final String version=currentVersion.replaceFirst("String_Node_Str" + featureName,"String_Node_Str");
      mvnSetVersions(version);
      gitCommit("String_Node_Str");
    }
    if (installProject) {
      mvnCleanInstall();
    }
    if (!keepBranch) {
      gitBranchDelete(featureBranchName);
    }
  }
 catch (  CommandLineException e) {
    getLog().error(e);
  }
}

Fixed version (ground truth):
/** 
 * {@inheritDoc} 
 */
@Override public void execute() throws MojoExecutionException, MojoFailureException {
  try {
    checkUncommittedChanges();
    final String featureBranches=gitFindBranches(gitFlowConfig.getFeatureBranchPrefix());
    if (StringUtils.isBlank(featureBranches)) {
      throw new MojoFailureException("String_Node_Str");
    }
    final String[] branches=featureBranches.split("String_Node_Str");
    List<String> numberedList=new ArrayList<String>();
    StringBuilder str=new StringBuilder("String_Node_Str").append(LS);
    for (int i=0; i < branches.length; i++) {
      str.append((i + 1) + "String_Node_Str" + branches[i]+ LS);
      numberedList.add("String_Node_Str" + (i + 1));
    }
    str.append("String_Node_Str");
    String featureNumber=null;
    try {
      while (StringUtils.isBlank(featureNumber)) {
        featureNumber=prompter.prompt(str.toString(),numberedList);
      }
    }
 catch (    PrompterException e) {
      getLog().error(e);
    }
    String featureBranchName=null;
    if (featureNumber != null) {
      int num=Integer.parseInt(featureNumber);
      featureBranchName=branches[num - 1];
    }
    if (StringUtils.isBlank(featureBranchName)) {
      throw new MojoFailureException("String_Node_Str");
    }
    gitCheckout(featureBranchName);
    if (!skipTestProject) {
      mvnCleanTest();
    }
    gitCheckout(gitFlowConfig.getDevelopmentBranch());
    gitMergeNoff(featureBranchName);
    final String currentVersion=getCurrentProjectVersion();
    final String featureName=featureBranchName.replaceFirst(gitFlowConfig.getFeatureBranchPrefix(),"String_Node_Str");
    if (currentVersion.contains("String_Node_Str" + featureName)) {
      final String version=currentVersion.replaceFirst("String_Node_Str" + featureName,"String_Node_Str");
      mvnSetVersions(version);
      gitCommit("String_Node_Str");
    }
    if (installProject) {
      mvnCleanInstall();
    }
    if (!keepBranch) {
      gitBranchDelete(featureBranchName);
    }
  }
 catch (  CommandLineException e) {
    getLog().error(e);
  }
}