Program: 178665
Project: 178665
Buggy source:
@Override public boolean perform(AbstractBuild<?,?> build,Launcher launcher,BuildListener listener) throws AbortException {
  KlocworkLogger logger=new KlocworkLogger("String_Node_Str",listener.getLogger());
  logger.logMessage("String_Node_Str");
  EnvVars envVars=new EnvVars();
  try {
    envVars=build.getEnvironment(launcher.getListener());
    KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getVersionCmd());
    if (!desktopConfig.hasExistingProject(build.getWorkspace(),envVars)) {
      KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getKwcheckCreateCmd(envVars,build.getWorkspace()));
    }
 else {
      KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getKwcheckSetCmd(envVars,build.getWorkspace()));
    }
    String diffList="String_Node_Str";
    if (desktopConfig.getIncrementalAnalysis()) {
      logger.logMessage("String_Node_Str" + "String_Node_Str" + desktopConfig.getDiffFileList(envVars));
      if (desktopConfig.isGitDiffType()) {
        logger.logMessage("String_Node_Str");
        KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getGitDiffCmd(envVars));
      }
 else {
      }
      diffList=desktopConfig.getKwcheckDiffList(envVars,build.getWorkspace(),launcher);
      if (StringUtils.isEmpty(diffList)) {
        logger.logMessage("String_Node_Str" + "String_Node_Str");
        return true;
      }
    }
    KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getKwcheckRunCmd(envVars,build.getWorkspace(),diffList));
  }
 catch (  IOException|InterruptedException ex) {
    throw new AbortException(ex.getMessage());
  }
  return true;
}

Fixed version (ground truth):
@Override public boolean perform(AbstractBuild<?,?> build,Launcher launcher,BuildListener listener) throws AbortException {
  KlocworkLogger logger=new KlocworkLogger("String_Node_Str",listener.getLogger());
  logger.logMessage("String_Node_Str");
  EnvVars envVars=new EnvVars();
  try {
    envVars=build.getEnvironment(launcher.getListener());
    KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getVersionCmd());
    if (!desktopConfig.hasExistingProject(build.getWorkspace(),envVars)) {
      KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getKwcheckCreateCmd(envVars,build.getWorkspace()));
    }
 else {
      KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getKwcheckSetCmd(envVars,build.getWorkspace()));
    }
    String diffList="String_Node_Str";
    if (desktopConfig.getIncrementalAnalysis()) {
      logger.logMessage("String_Node_Str" + "String_Node_Str" + desktopConfig.getDiffFileList(envVars));
      if (desktopConfig.isGitDiffType()) {
        logger.logMessage("String_Node_Str");
        KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getGitDiffCmd(envVars));
      }
 else {
      }
      diffList=desktopConfig.getKwcheckDiffList(envVars,build.getWorkspace(),launcher);
      if (StringUtils.isEmpty(diffList)) {
        logger.logMessage("String_Node_Str" + "String_Node_Str");
        analysisSkipped=true;
        return true;
      }
    }
    KlocworkUtil.executeCommand(launcher,listener,build.getWorkspace(),envVars,desktopConfig.getKwcheckRunCmd(envVars,build.getWorkspace(),diffList));
  }
 catch (  IOException|InterruptedException ex) {
    throw new AbortException(ex.getMessage());
  }
  return true;
}