Saxon

This XQuery

for $x in saxon:stream(doc('uriresolver:resolve')/*/*/element {node-name()} {node()}) return $x

did not qualify for streaming in 9.6, but fell back to non-streaming mode.

With 9.7, it throws this exception:

net.sf.saxon.s9api.SaxonApiUncheckedException: No watch found for xsl:element
	at net.sf.saxon.s9api.XdmSequenceIterator.hasNext(XdmSequenceIterator.java:66)
	at net.sf.saxon.s9api.XdmSequenceIterator.next(XdmSequenceIterator.java:90)
	at NonStreamableQuery.testNonStreamableQueryUsingSaxonStream(NonStreamableQuery.java:43)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
	at org.testng.TestRunner.privateRun(TestRunner.java:767)
	at org.testng.TestRunner.run(TestRunner.java:617)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
	at org.testng.SuiteRunner.run(SuiteRunner.java:240)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
	at org.testng.TestNG.run(TestNG.java:1057)
	at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
	at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
	at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
Caused by: net.sf.saxon.trans.XPathException: No watch found for xsl:element
	at com.saxonica.ee.bytecode.util.Callback.makeXPathException(Callback.java:143)
	at gen_SlashContextMappingFunction_1.map(Unknown Source)
	at net.sf.saxon.expr.ContextMappingIterator.next(ContextMappingIterator.java:61)
	at net.sf.saxon.query.XQueryExpression$ErrorReportingIterator.next(XQueryExpression.java:846)
	at net.sf.saxon.s9api.XdmSequenceIterator.hasNext(XdmSequenceIterator.java:57)
	... 26 more