XML::LibXML handles the vertical tab (\x0b) differently if encoding of the document is specified explicitly. Without encoding, the character is not inserted when serializing the document, but if you specify the encoding (I used both utf-8 and iso-8859-1), the character is present in the serialization, which means it can't be parsed back (\x0b is not permitted in XML, at least in version 1.0, see Cafe con Leche). 
#!/usr/bin/perl
use warnings;
use strict;

use XML::LibXML;

my @docs = (
            'XML::LibXML::Document'->createDocument('1.0'),
            'XML::LibXML::Document'->createDocument('1.0', 'utf-8'),
           );

for my $doc (@docs) {
    $doc->setDocumentElement(my $root = $doc->createElement('root'));
    $root->appendText("\x0b");
}

for my $doc (@docs) {
    print ".\n";
    'XML::LibXML'->load_xml(string => $doc->toString);
}

[download]

Do I miss something? Should I file a bug report?

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Vertical Tab (\x0b) in XML::LibXML by choroba

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.