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Bug #4251

closed

java.lang.NullPointerException in Saxon-EE 9.9.1.4J but not Saxon-PE 9.9.1.4J

Added by Tony Graham over 5 years ago. Updated about 5 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Michael Kay
Category:
XPath conformance
Sprint/Milestone:
-
Start date:
2019-07-12
Due date:
% Done:

100%

Estimated time:
Legacy ID:
Applies to branch:
9.9, trunk
Fix Committed on Branch:
9.9, trunk
Fixed in Maintenance Release:
9.9.1.5
Platforms:

Description

I am getting a java.lang.NullPointerException only in Saxon-EE.

I will add a sample as soon as I can. I am posting the stack trace now in the hope that you have an 'Aha!' moment sooner than I can whittle everything down to a manageable size.

java.lang.NullPointerException
        at net.sf.saxon.expr.VariableReference.computeCardinality(VariableReference.java:395)
        at net.sf.saxon.expr.Expression.computeStaticProperties(Expression.java:1196)
        at net.sf.saxon.expr.Expression.getDependencies(Expression.java:772)
        at net.sf.saxon.expr.Expression.computeDependencies(Expression.java:1258)
        at net.sf.saxon.expr.Expression.computeStaticProperties(Expression.java:1195)
        at net.sf.saxon.expr.Expression.getCardinality(Expression.java:714)
        at net.sf.saxon.expr.parser.TypeChecker.staticTypeCheck(TypeChecker.java:159)
        at net.sf.saxon.expr.GeneralComparison.typeCheck(GeneralComparison.java:211)
        at com.saxonica.ee.optim.IndexedFilterExpression.optimize(IndexedFilterExpression.java:185)

To this untrained eye, this looks similar to #2567

Unfortunately, the first and last stylesheet references in the stack trace are:

Caused by: java.lang.RuntimeException: Internal error evaluating template rule  at line 98 in module file:/P:/tgraham/pubsrc/xsl/xxxxx2pdf/generateBookmarks.xsl

which is this template:

  <xsl:template mode="make-bookmark-label" match="xhtml:header" as="xs:string?">
    <xsl:param name="doDebug" as="xs:boolean" tunnel="yes" select="false()"/>
    
    <xsl:variable name="content">
      <xsl:apply-templates mode="#current">
        <xsl:with-param name="doDebug" as="xs:boolean" tunnel="yes" select="$doDebug"/>
      </xsl:apply-templates>
    </xsl:variable>

  	<xsl:variable name="base-text">
      <xsl:value-of select="$content"/>
    </xsl:variable>
    <xsl:sequence select="normalize-space($base-text)"/>
  </xsl:template>

so I'm not expecting much joy until you can see a sample.

Files

stacktrace.txt (47.5 KB) stacktrace.txt Tony Graham, 2019-07-12 18:56

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