I have a arduino project and I created this struct:

struct Project {
  boolean         status;
  String          name;
  struct Project* nextProject;
};

In my application I parse some data and create Project objects. To have them in a list there is a pointer to the nextProject in each Project object expect the last. This is the code where I add new projects:

void RssParser::addProject(boolean tempProjectStatus, String tempData) {
  if (!startProject) {
    startProject = true;

    firstProject.status      = tempProjectStatus;
    firstProject.name        = tempData;
    firstProject.nextProject = NULL;

    ptrToLastProject = &firstProject;
  } else {

    ptrToLastProject->nextProject = new Project();

    ptrToLastProject->nextProject->status      = tempProjectStatus;
    ptrToLastProject->nextProject->name        = tempData;
    ptrToLastProject->nextProject->nextProject = NULL;

    ptrToLastProject = ptrToLastProject->nextProject;
  }
}

firstProject is an private instance variable and defined in the header file like this:

Project firstProject;

So if there actually no project was added, I use firstProject, to add a new one, if firstProject is set I use the nextProject pointer.

Also I have a reset() method that deletes the pointer to the projects:

void RssParser::reset() { 
  delete ptrToLastProject;
  delete firstProject.nextProject;

  startProject = false;
}

After each parsing run I call reset() the problem is that the memory used is not released. If I comment out the addProject method there are no issues with my memory. Someone can tell me what could cause the memory leak?