Program: 35680
Project: 35680
Buggy source:
@NonNull @Override protected Result onRunJob(Params params){
  NextcloudTalkApplication.getSharedApplication().getComponentApplication().inject(this);
  PushConfigurationState pushConfigurationState;
  for (  Object userEntityObject : userUtils.getUsersScheduledForDeletion()) {
    UserEntity userEntity=(UserEntity)userEntityObject;
    try {
      pushConfigurationState=LoganSquare.parse(userEntity.getPushConfigurationState(),PushConfigurationState.class);
      PushConfigurationState finalPushConfigurationState=pushConfigurationState;
      ncApi.unregisterDeviceForNotificationsWithNextcloud(ApiHelper.getCredentials(userEntity.getUsername(),userEntity.getToken()),ApiHelper.getUrlNextcloudPush(userEntity.getBaseUrl())).subscribe(new Observer<GenericOverall>(){
        @Override public void onSubscribe(        Disposable d){
        }
        @Override public void onNext(        GenericOverall genericOverall){
          if (genericOverall.getOcs().getMeta().getStatusCode().equals("String_Node_Str") || genericOverall.getOcs().getMeta().getStatusCode().equals("String_Node_Str")) {
            HashMap<String,String> queryMap=new HashMap<>();
            queryMap.put("String_Node_Str",finalPushConfigurationState.deviceIdentifier);
            queryMap.put("String_Node_Str",finalPushConfigurationState.getUserPublicKey());
            queryMap.put("String_Node_Str",finalPushConfigurationState.getDeviceIdentifierSignature());
            ncApi.unregisterDeviceForNotificationsWithProxy(ApiHelper.getCredentials(userEntity.getUsername(),userEntity.getToken()),ApiHelper.getUrlPushProxy(),queryMap).subscribe(new Observer<Void>(){
              @Override public void onSubscribe(              Disposable d){
              }
              @Override public void onNext(              Void aVoid){
                userUtils.deleteUser(userEntity.getUsername(),userEntity.getBaseUrl());
              }
              @Override public void onError(              Throwable e){
              }
              @Override public void onComplete(){
              }
            }
);
          }
        }
        @Override public void onError(        Throwable e){
        }
        @Override public void onComplete(){
        }
      }
);
    }
 catch (    IOException e) {
      Log.d(TAG,"String_Node_Str");
    }
  }
  return Result.SUCCESS;
}

Fixed version (ground truth):
@NonNull @Override protected Result onRunJob(Params params){
  NextcloudTalkApplication.getSharedApplication().getComponentApplication().inject(this);
  PushConfigurationState pushConfigurationState;
  for (  Object userEntityObject : userUtils.getUsersScheduledForDeletion()) {
    UserEntity userEntity=(UserEntity)userEntityObject;
    try {
      if (!TextUtils.isEmpty(userEntity.getPushConfigurationState())) {
        pushConfigurationState=LoganSquare.parse(userEntity.getPushConfigurationState(),PushConfigurationState.class);
        PushConfigurationState finalPushConfigurationState=pushConfigurationState;
        ncApi.unregisterDeviceForNotificationsWithNextcloud(ApiHelper.getCredentials(userEntity.getUsername(),userEntity.getToken()),ApiHelper.getUrlNextcloudPush(userEntity.getBaseUrl())).subscribe(new Observer<GenericOverall>(){
          @Override public void onSubscribe(          Disposable d){
          }
          @Override public void onNext(          GenericOverall genericOverall){
            if (genericOverall.getOcs().getMeta().getStatusCode().equals("String_Node_Str") || genericOverall.getOcs().getMeta().getStatusCode().equals("String_Node_Str")) {
              HashMap<String,String> queryMap=new HashMap<>();
              queryMap.put("String_Node_Str",finalPushConfigurationState.deviceIdentifier);
              queryMap.put("String_Node_Str",finalPushConfigurationState.getUserPublicKey());
              queryMap.put("String_Node_Str",finalPushConfigurationState.getDeviceIdentifierSignature());
              ncApi.unregisterDeviceForNotificationsWithProxy(ApiHelper.getCredentials(userEntity.getUsername(),userEntity.getToken()),ApiHelper.getUrlPushProxy(),queryMap).subscribe(new Observer<Void>(){
                @Override public void onSubscribe(                Disposable d){
                }
                @Override public void onNext(                Void aVoid){
                  userUtils.deleteUser(userEntity.getUsername(),userEntity.getBaseUrl()).subscribe(new CompletableObserver(){
                    @Override public void onSubscribe(                    Disposable d){
                    }
                    @Override public void onComplete(){
                    }
                    @Override public void onError(                    Throwable e){
                    }
                  }
);
                }
                @Override public void onError(                Throwable e){
                }
                @Override public void onComplete(){
                }
              }
);
            }
          }
          @Override public void onError(          Throwable e){
          }
          @Override public void onComplete(){
          }
        }
);
      }
 else {
        userUtils.deleteUser(userEntity.getUsername(),userEntity.getBaseUrl()).subscribe(new CompletableObserver(){
          @Override public void onSubscribe(          Disposable d){
          }
          @Override public void onComplete(){
          }
          @Override public void onError(          Throwable e){
          }
        }
);
      }
    }
 catch (    IOException e) {
      Log.d(TAG,"String_Node_Str");
      userUtils.deleteUser(userEntity.getUsername(),userEntity.getBaseUrl());
    }
  }
  return Result.SUCCESS;
}