Description:
------------
Error messages are printed when parsing invalid XML document despite of the fact that they should be (and are) converted to exceptions.

Reproduce code:
---------------
<?php

function err2exc($errno, $errstr, $errfile, $errline) {
    throw new Exception($errstr);
}

$xml = '<?xml version="1.0"?>
<aaa>

    <bbb>ddddd < </bbb>

    </aaa
';

set_error_handler('err2exc', E_ALL);
error_reporting(E_ALL);

try {
    $doc = DOMDocument::loadXML($xml);
} catch (Exception $e) {
    echo "Exception caught\n";
    var_dump($e->getMessage());
}

?>


Expected result:
----------------
Exception caught
string(73) "DOMDocument::loadXML(): StartTag: invalid element name in Entity, line: 4"

Actual result:
--------------
Warning: DOMDocument::loadXML(): expected '>' in Entity, line: 7 in /tmp/1.php on line 26
Exception caught
string(73) "DOMDocument::loadXML(): StartTag: invalid element name in Entity, line: 4"