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Bug #6378
closedNPE while transforming with a TraceListener
Start date:
2024-03-26
Due date:
% Done:
100%
Estimated time:
Legacy ID:
Applies to branch:
11, 12, trunk
Fix Committed on Branch:
11, 12, trunk
Fixed in Maintenance Release:
Platforms:
Java
Description
While debugging with Oxygen the xml file: 47465.xml with the stylesheet: bho-to-clml.xml and using as configuration file for SaxonEE the "saxon.xml" file, we got the following exception:
ERROR [ TransformationEngine ] ro.sync.xml.transformer.TransformerCreator - Got a NPE trying to validate a stylesheet!! java.lang.NullPointerException
java.lang.NullPointerException: null
at net.sf.saxon.expr.parser.ExpressionTool.injectCode(ExpressionTool.java:175)
at net.sf.saxon.trace.TraceCodeInjector.process(TraceCodeInjector.java:46)
at net.sf.saxon.style.XSLGlobalVariable.compileDeclaration(XSLGlobalVariable.java:299)
at net.sf.saxon.style.PrincipalStylesheetModule.compile(PrincipalStylesheetModule.java:1291)
at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:324)
at net.sf.saxon.trans.packages.PackageLibrary.obtainLoadedPackage(PackageLibrary.java:309)
at net.sf.saxon.style.Compilation.satisfyPackageDependencies(Compilation.java:205)
at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:283)
at net.sf.saxon.style.StylesheetModule.loadStylesheet(StylesheetModule.java:254)
at net.sf.saxon.style.Compilation.compileSingletonPackage(Compilation.java:113)
at net.sf.saxon.s9api.XsltCompiler.compile(XsltCompiler.java:971)
at net.sf.saxon.jaxp.SaxonTransformerFactory.newTemplates(SaxonTransformerFactory.java:174)
at net.sf.saxon.jaxp.SaxonTransformerFactory.newTransformer(SaxonTransformerFactory.java:131)
at ro.sync.xml.transformer.TransformerCreator.createInternalXSLTTransformer(TransformerCreator.java:2556)
at ro.sync.xml.transformer.TransformerCreator.createXSLOrJSONTransformer(TransformerCreator.java:1641)
at ro.sync.xml.transformer.TransformerCreator.createTransformer(TransformerCreator.java:811)
at ro.sync.xml.transformer.TransformerCreator.createTransformer(TransformerCreator.java:708)
at ro.sync.xml.transformer.TransformerCreator.createTransformer(TransformerCreator.java:684)
at ro.sync.dxsl.debugger.saxon8.SaxonXSLTDebugger.createTransformer(SaxonXSLTDebugger.java:235)
at ro.sync.dxsl.debugger.AbstractXSLTDebugger.initEngine(AbstractXSLTDebugger.java:429)
at ro.sync.dxsl.debugger.AbstractXSLTDebugger.run(AbstractXSLTDebugger.java:561)
at java.base/java.lang.Thread.run(Thread.java:1595)
Please note that we use in Oxygen Saxon 12.3.
We reproduce the problem also from the command line, using the Saxon-EE 12.4:
java -jar saxon-ee-12.4.jar -s:47465.xml -xsl:bho-to-clml.xsl -config:saxon.xml -T
java.lang.NullPointerException: Cannot invoke "net.sf.saxon.expr.Expression.operands()" because "exp" is null
at net.sf.saxon.expr.parser.ExpressionTool.injectCode(ExpressionTool.java:175)
at net.sf.saxon.trace.TraceCodeInjector.process(TraceCodeInjector.java:46)
at net.sf.saxon.style.XSLGlobalVariable.compileDeclaration(XSLGlobalVariable.java:299)
at net.sf.saxon.style.PrincipalStylesheetModule.compile(PrincipalStylesheetModule.java:1290)
at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:338)
at net.sf.saxon.trans.packages.PackageLibrary.obtainLoadedPackage(PackageLibrary.java:309)
at net.sf.saxon.style.Compilation.satisfyPackageDependencies(Compilation.java:207)
at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:297)
at net.sf.saxon.style.StylesheetModule.loadStylesheet(StylesheetModule.java:254)
at net.sf.saxon.style.Compilation.compileSingletonPackage(Compilation.java:115)
at net.sf.saxon.s9api.XsltCompiler.compile(XsltCompiler.java:971)
at net.sf.saxon.Transform.doTransform(Transform.java:777)
at net.sf.saxon.Transform.main(Transform.java:83)
Fatal error during transformation: java.lang.NullPointerException: Cannot invoke "net.sf.saxon.expr.Expression.operands()" because "exp" is null
Regards, Mircea.
Files
Updated by Michael Kay 9 months ago
So far I haven't been able to reproduce this. I shall keep trying.
Updated by Michael Kay 9 months ago
Now reproduced. For some reason I dropped the -T option.
Updated by Michael Kay 9 months ago
- Category set to XSLT 3.0 packages
- Assignee set to Michael Kay
OK, got it: it's trying to inject trace code into the body of the variable
<xsl:variable name="common:reportId" visibility="abstract"/>
which doesn't have a body because it is abstract.
Updated by Michael Kay 9 months ago
- Status changed from New to Resolved
- Priority changed from High to Normal
- Applies to branch 11, 12, trunk added
- Fix Committed on Branch 11, 12, trunk added
- Platforms Java added
Updated by O'Neil Delpratt 5 months ago
- % Done changed from 0 to 100
- Fixed in Maintenance Release 12.5 added
Bug fix applied in the Saxon 12.5 Maintenance release. Not marking this closed until patched in older releases (i.e 11.x).
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