Lack of error handling in IntlDateFormatter::localtime()

intldateformatter_error_handling.php

<?php

// Correct input value:
// $value = 'Wednesday, December 18, 2014 4:05:06 PM PT';

// Wrong input value that I suppose should rather return false:
$value = 'XXX';

$formatter = new IntlDateFormatter
(
    'en_US',
    IntlDateFormatter::FULL,
    IntlDateFormatter::FULL,
    'America/Los_Angeles',
    IntlDateFormatter::GREGORIAN
);

$localtime = $formatter->localtime($value, $position);

var_dump(datefmt_get_error_code($formatter)); // int(0) no matter what
var_dump(intl_get_error_code()); // int(0) no matter what

var_dump($formatter->format($localtime)); // string(60) "Monday, December 7, 2015 at 4:17:13 AM Pacific Standard Time"

var_dump(datefmt_get_error_code($formatter)); // int(0) no matter what
var_dump(intl_get_error_code()); // int(0) no matter what