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--TEST--
GH-9628 (Implicitly removing nodes from \DOMDocument breaks existing references) - simple variation
--EXTENSIONS--
dom
--FILE--
<?php
$html = <<<'HTML'
<p xmlns="some:ns">
<span id="1" xmlns:test="some:ns2">
<strong>
<span id="2">Test <test:test/></span>
</strong>
</span>
</p>
HTML;
$doc = new DOMDocument('1.0', 'UTF-8');
$doc->loadXML($html);
$outer_span = $doc->documentElement->firstElementChild;
$inner_span = $outer_span->firstElementChild->firstElementChild;
var_dump($inner_span->namespaceURI);
// Remove strong
$outer_span->firstElementChild->remove();
var_dump($inner_span->getAttribute('id'));
var_dump($inner_span->namespaceURI);
// Import test
$doc = new DOMDocument();
$doc->append($doc->importNode($outer_span, true), $doc->importNode($inner_span, true));
echo $doc->saveXML();
var_dump($inner_span->getAttribute('id'));
var_dump($inner_span->namespaceURI);
?>
--EXPECT--
string(7) "some:ns"
string(1) "2"
string(7) "some:ns"
<?xml version="1.0"?>
<span xmlns:test="some:ns2" xmlns="some:ns" id="1">
</span>
<default:span xmlns:default="some:ns" xmlns:test="some:ns2" id="2">Test <test:test/></default:span>
string(1) "2"
string(7) "some:ns"
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