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Bug #2594
closedNullPointerException when compiling an XPath expression
Start date:
2016-01-21
Due date:
% Done:
100%
Estimated time:
Legacy ID:
Applies to branch:
9.7
Fix Committed on Branch:
9.7
Fixed in Maintenance Release:
Platforms:
Description
I have obtained a NPE when trying to compile the next XPath expression:
ancestor-or-self::*[@conref] | .[ancestor-or-self::p][@conref]
Exception in thread "main" java.lang.NullPointerException: Internal error: expression .[exists(...)][exists(...)] has no retained static context
at net.sf.saxon.expr.Expression.getConfiguration(Expression.java:1089)
at net.sf.saxon.expr.FilterExpression.optimize(FilterExpression.java:296)
at net.sf.saxon.expr.FilterExpression.optimize(FilterExpression.java:457)
at net.sf.saxon.expr.Operand.optimize(Operand.java:200)
at net.sf.saxon.expr.Expression.optimizeChildren(Expression.java:496)
at net.sf.saxon.expr.UnaryExpression.optimize(UnaryExpression.java:112)
at net.sf.saxon.expr.Operand.optimize(Operand.java:200)
at net.sf.saxon.expr.sort.DocumentSorter.optimize(DocumentSorter.java:99)
at net.sf.saxon.expr.Operand.optimize(Operand.java:200)
at net.sf.saxon.expr.Expression.optimizeChildren(Expression.java:496)
at net.sf.saxon.expr.BinaryExpression.optimize(BinaryExpression.java:171)
at net.sf.saxon.expr.VennExpression.optimize(VennExpression.java:312)
at net.sf.saxon.sxpath.XPathEvaluator.createExpression(XPathEvaluator.java:150)
at net.sf.saxon.s9api.XPathCompiler.internalCompile(XPathCompiler.java:506)
at net.sf.saxon.s9api.XPathCompiler.compile(XPathCompiler.java:481)
at Sample.main(Sample.java:12)
The problem can be reproduced running this code:
public static void main(String[] args) throws Exception {
net.sf.saxon.s9api.Processor processor = new net.sf.saxon.s9api.Processor(true);
XPathCompiler newXPathCompiler = processor.newXPathCompiler();
newXPathCompiler.compile("ancestor-or-self::*[@conref] | .[ancestor-or-self::p][@conref]");
}
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