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Saxon9.1: NPE in QueryParser.parseForClause()
Added by Anonymous almost 15 years ago
Legacy ID: #7475429
Legacy Poster: Wouter Cordewiner (wcordewiner)
Granted, not the most typical use case and can easily be worked around by pulling
the FLWOR out of the attribute content: <e attr="{for $x at $y in
(1,2,3) return $y}"/> gives with Saxon 9.1:
java.lang.NullPointerException at
net.sf.saxon.query.QueryParser.parseForClause(QueryParser.java:1849) at
net.sf.saxon.query.QueryParser.parseForExpression(QueryParser.java:1640) at
net.sf.saxon.expr.ExpressionParser.parseExprSingle(ExpressionParser.java:338) at
net.sf.saxon.expr.ExpressionParser.parseExpression(ExpressionParser.java:306) at
net.sf.saxon.expr.ExpressionParser.parse(ExpressionParser.java:228) at
net.sf.saxon.query.QueryParser.makeAttributeContent(QueryParser.java:3131) at
net.sf.saxon.query.QueryParser.parseDirectElementConstructor(QueryParser.java:2840) at
net.sf.saxon.query.QueryParser.parsePseudoXML(QueryParser.java:2767) at
net.sf.saxon.query.QueryParser.parseConstructor(QueryParser.java:2357) at
net.sf.saxon.expr.ExpressionParser.parseBasicStep(ExpressionParser.java:1387) at
net.sf.saxon.expr.ExpressionParser.parseStepExpression(ExpressionParser.java:1213)
...
Legacy ID: #7475457
Legacy Poster: Michael Kay (mhkay)
Thanks for reporting this. It will affect any FOR expression with a positional
variable appearing between curly braces in attribute content (Saxon parses such
expressions twice, because they may be subject to namespace declarations that have not
yet been read. The first pass should be a syntax-check only, to locate the closing
"}". But with a positional FOR expression, some semantic analysis is
being done.) I'll raise a bug report and a patch.
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