Program: 8554
Project: 8554
Buggy source:
/** 
 * POST  /account/preferences -> update account's preferences
 */
@RequestMapping(value="String_Node_Str",method=RequestMethod.POST,produces="String_Node_Str") @ResponseBody @Timed public Preferences updatePreferences(@RequestBody Preferences newPreferences,HttpServletResponse response){
  this.log.debug("String_Node_Str");
  Preferences preferences=null;
  try {
    User currentUser=authenticationService.getCurrentUser();
    currentUser.setPreferencesMentionEmail(newPreferences.getMentionEmail());
    currentUser.setDailyDigestSubscription(newPreferences.getDailyDigest());
    currentUser.setWeeklyDigestSubscription(newPreferences.getWeeklyDigest());
    String rssUid=userService.updateRssTimelinePreferences(newPreferences.getRssUidActive());
    currentUser.setRssUid(rssUid);
    preferences=new Preferences(currentUser);
    userService.updateUser(currentUser);
    userService.updateDailyDigestRegistration(newPreferences.getDailyDigest());
    userService.updateWeeklyDigestRegistration(newPreferences.getWeeklyDigest());
    org.springframework.security.core.userdetails.User securityUser=(org.springframework.security.core.userdetails.User)SecurityContextHolder.getContext().getAuthentication().getPrincipal();
    log.debug("String_Node_Str",securityUser);
    Authentication authentication=new UsernamePasswordAuthenticationToken(securityUser,securityUser.getPassword(),securityUser.getAuthorities());
    SecurityContextHolder.getContext().setAuthentication(authentication);
    log.debug("String_Node_Str",currentUser);
  }
 catch (  Exception e) {
    log.debug("String_Node_Str",e);
    response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
  }
 finally {
    return preferences;
  }
}

Fixed version (ground truth):
/** 
 * POST  /account/preferences -> update account's preferences
 */
@RequestMapping(value="String_Node_Str",method=RequestMethod.POST,produces="String_Node_Str") @ResponseBody @Timed public Preferences updatePreferences(@RequestBody Preferences newPreferences,HttpServletResponse response){
  log.debug("String_Node_Str");
  Preferences preferences=null;
  try {
    User currentUser=authenticationService.getCurrentUser();
    currentUser.setPreferencesMentionEmail(newPreferences.getMentionEmail());
    currentUser.setDailyDigestSubscription(newPreferences.getDailyDigest());
    currentUser.setWeeklyDigestSubscription(newPreferences.getWeeklyDigest());
    String rssUid=userService.updateRssTimelinePreferences(newPreferences.getRssUidActive());
    currentUser.setRssUid(rssUid);
    preferences=new Preferences(currentUser);
    userService.updateUser(currentUser);
    userService.updateDailyDigestRegistration(newPreferences.getDailyDigest());
    userService.updateWeeklyDigestRegistration(newPreferences.getWeeklyDigest());
    org.springframework.security.core.userdetails.User securityUser=(org.springframework.security.core.userdetails.User)SecurityContextHolder.getContext().getAuthentication().getPrincipal();
    log.debug("String_Node_Str",securityUser);
    Authentication authentication=new UsernamePasswordAuthenticationToken(securityUser,securityUser.getPassword(),securityUser.getAuthorities());
    SecurityContextHolder.getContext().setAuthentication(authentication);
    log.debug("String_Node_Str",currentUser);
  }
 catch (  Exception e) {
    log.debug("String_Node_Str",e);
    response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
  }
  return preferences;
}