Saxon

Bug #1577

Updated by Michael Kay almost 12 years ago

The following query (taken from W3C FOTS:fn-function-lookup-614) causes Saxon to throw an NullPointer exception: 

 <pre> 
 let $f := function-lookup(QName("http://exslt.org/dates-and-times", "month-abbreviation"), 1) 
 return if (exists($f)) then $f("2012-02-28") else "not-available" 
 </pre> 

 The problem will occur when looking up any function implemented as a Java external/extension function. 

 The stack trace of the exception thrown is as follows: 

 java.lang.NullPointerException 
	 at com.saxonica.expr.JavaExtensionFunctionCall.setupParams(JavaExtensionFunctionCall.java:532) 
	 at com.saxonica.expr.JavaExtensionFunctionCall.call(JavaExtensionFunctionCall.java:390) 
	 at com.saxonica.expr.JavaExtensionFunctionCall.iterate(JavaExtensionFunctionCall.java:278) 
	 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.expr.instruct.Choose.iterate(Choose.java:863) 
	 at net.sf.saxon.expr.LetExpression.iterate(LetExpression.java:338) 
	 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) 

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