| Subject: | findnodes() behaves strangely on elements that don't belong to a document |
When findnodes() is called on an element that does not belong to a document, it changes the parent of element's children. This is demonstrated in the following little script:
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#!/usr/bin/perl
use strict;
use XML::LibXML;
my $tree = XML::LibXML::Element->new( 'tree' );
my $inbox = XML::LibXML::Element->new( 'tree_element' );
$tree->appendChild($inbox);
#uncomment next 2 lines to prevent findnodes() from changing parent
#my $doc = XML::LibXML::Document->new();
#$doc->setDocumentElement($tree);
print STDERR "parent:", $inbox->parentNode()->nodeName(), " ", $inbox->parentNode(), "\n";
#comment next line to see what happens
my ($res) = $tree->findnodes( "*[\@some_attr='something']" );
print STDERR "parent:", $inbox->parentNode()->nodeName(), " ", $inbox->parentNode(), "\n";
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The output of the script is something like:
parent:tree XML::LibXML::Element=SCALAR(0x81e1370)
parent:tree XML::LibXML::Element=SCALAR(0x81e13a0)
and when finnodes() call is commented:
parent:tree XML::LibXML::Element=SCALAR(0x81e1328)
parent:tree XML::LibXML::Element=SCALAR(0x81e1328)
However, if the element on which findnodes() is called belongs to a document, the parent is not changed.
Tested with XML::LibXML 1.58_1 and libxml2-2.6.8, libxml2-2.6.12 and
libxml2-2.6.20