Saxon

The following query (taken from W3C FOTS:fn-function-lookup-184) causes Saxon to throw an IllegalArgument Exception:

function-lookup(fn:QName('http://www.w3.org/2005/xpath-functions', 'months-from-duration'), 1)(xs:yearMonthDuration("P20Y15M"))

The problem applies to all functions of the form X-from-Y that access a component of a date, time, dateTime, or duration.

The stack trace of the exception thrown is as follows:

java.lang.IllegalArgumentException: Unknown component for duration: 0

at net.sf.saxon.value.DurationValue.getComponent(DurationValue.java:598)

at net.sf.saxon.functions.Component.evaluateItem(Component.java:113)

at net.sf.saxon.expr.Expression.iterate(Expression.java:429)

at com.saxonica.functions.hof.FirstClassFunction.invoke(FirstClassFunction.java:104)

at com.saxonica.functions.hof.DynamicFunctionCallDefinition$DynamicFunctionCall.call(DynamicFunctionCallDefinition.java:158)

at net.sf.saxon.functions.IntegratedFunctionCall.iterate(IntegratedFunctionCall.java:235)

at net.sf.saxon.query.XQueryExpression.iterator(XQueryExpression.java:341)

at net.sf.saxon.s9api.XQueryEvaluator.evaluate(XQueryEvaluator.java:378)

at com.saxonica.testdriver.FOTestSuiteDriver.runTestCase(FOTestSuiteDriver.java:1142)