Bug 2955. Workaround for lack of atomic operations in GCCE standard libraries (fall back to default use of Mutex)
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- Namespace name test: an http IRI that is not a URI -->
<!DOCTYPE foo [
<!ELEMENT foo ANY>
<!ATTLIST foo xmlns CDATA #IMPLIED>
]>
<foo xmlns="http://example.org/rosé"/>