This shows "Fatal error: Maximum function nesting level of '256' reached, aborting!"

ErraticEloquentQuery.php

<?php
public function getAcademicYearAttribute(){

		$year_start = Carbon::parse($this->date_start)->year;
		$year_end = Carbon::parse($this->date_end)->year;

		$academic_year = 
		self::select(['date_start','date_end', 'semester'])
		->whereYear('date_start', $year_start)
		->where(function($q) use ($year_end){
			$q->whereYear('date_end', '>=', $year_end)
			->whereYear('date_end', '<=', $year_end + 1);
		})->get();

		return $academic_year;
	}

//This is a cae of wrong loop, the one that goes forever