Saxon

While upgrading to Saxon-EE 9.7, I found that this code snippet now throws an UnsupportedOperationException:

        XPath xpath = new XPathFactoryImpl().newXPath();
        xpath.setNamespaceContext(namespaceContext);
        xpath.compile("//*:x");

where namespaceContext is a javax.xml.namespace.NamespaceContext.

Here is a stack trace:

Exception in thread "main" java.lang.UnsupportedOperationException
	at net.sf.saxon.xpath.JAXPXPathStaticContext.iteratePrefixes(JAXPXPathStaticContext.java:165)
	at net.sf.saxon.expr.parser.RetainedStaticContext.<init>(RetainedStaticContext.java:85)
	at net.sf.saxon.sxpath.AbstractStaticContext.makeRetainedStaticContext(AbstractStaticContext.java:109)
	at net.sf.saxon.expr.parser.XPathParser.parse(XPathParser.java:472)
	at net.sf.saxon.expr.parser.ExpressionTool.make(ExpressionTool.java:99)
	at net.sf.saxon.xpath.XPathEvaluator.compile(XPathEvaluator.java:194)

A complete program reproducing this is attached.