--- /dev/null
+--TEST--
+XMLReader: Bug #70309 XmlReader read generates extra output
+--SKIPIF--
+<?php if (!extension_loaded("xmlreader")) print "skip"; ?>
+<?php if (getenv("SKIP_SLOW_TESTS")) die("skip slow test"); ?>
+--FILE--
+<?php
+
+/* From the bug report an extra message comes from libxml2 debug output left unwrapped. */
+
+$doc = new \XMLReader();
+
+$doc->xml('<?xml version="1.0" encoding="UTF-8"?>
+<chapter xmlns="http://docbook.org/ns/docbook" version="5.0">
+<title>Test Chapter</title>
+<para>
+This is a paragraph in the test chapter. It is unremarkable in
+every regard. This is a paragraph in the test chapter. It is
+unremarkable in every regard. This is a paragraph in the test
+chapter. It is unremarkable in every regard.
+</para>
+<paar>
+<emphasis role="bold">This</emphasis> paragraph contains
+<emphasis>some <emphasis>emphasized</emphasis> text</emphasis>
+1and a <superscript>super</superscript>script
+and a <subscript>sub</subscript>script.
+</para>
+<para>
+This is a paragraph in the test chapter. It is unremarkable in
+every regard. This is a paragraph in the test chapter. It is
+unremarkable in every regard. This is a paragraph in the test
+chapter. It is unremarkable in every regard.
+</para>
+</chapter>');
+
+$doc->setRelaxNGSchema('http://docs.oasis-open.org/docbook/rng/5.0/docbook.rng');
+
+while (@$doc->read() !== false);
+?>
+===DONE===
+--EXPECTF--
+===DONE===