undefined behavior in gd_interpolation.c #19730

<?php
$v_426189 = '2008-05-23 00:00:00 +08';
$v_426190 = strtotime($v_426189,);
$v_426175 = 1;
$v_426176 = 1;
$v_426177 = 1;
$v_426178 = 1;
$v_426179 = 1;
$v_426173 = array(0 => $v_426190,1 => $v_426175,2 => $v_426176,3 => $v_426177,4 => $v_426178,5 => $v_426179,);
$v_426180 = 8;
$v_426181 = 8;
$v_426182 = imagecreatetruecolor($v_426180,$v_426181,);
try{
$v_426173 = array(0 => $v_426190,1 => $v_426175,2 => $v_426176,3 => $v_426177,4 => $v_426178,5 => $v_426179,);
$v_426186 = imageaffine($v_426182,$v_426173,);
}
catch (ValueError $e){
$v_426183 = $e->getMessage();
$v_426192 = '2008-05-23 00:00:00';
$v_426185 = $v_426192 . $v_426190;
}