List of all failed tasks caused by this and all previous errors.

        Returns:
            List[Task]

def full_tasktrace(self):
        """
        List of all failed tasks caused by this and all previous errors.

        Returns:
            List[Task]
        """
        if self.prev_error:
            return self.prev_error.tasktrace + self.tasktrace
        else:
            return self.tasktrace