Saxon

Reported by Radu Pisoi:

The latest Saxon library (9.7.0.2) throws the exception IllegalStateException with DITA-OT 1.8

D:\workspace_development_branch\eXml-branch-development\frameworks\dita\DITA-OT\build.xml:53: The following error occurred while executing this line:
D:\workspace_development_branch\eXml-branch-development\frameworks\dita\DITA-OT\plugins\org.dita.base\build_preprocess.xml:231: java.lang.IllegalStateException: *** Internal Saxon error: local variable encountered whose binding has been deleted
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:771)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.expr.parser.ExpressionTool.allocateSlots(ExpressionTool.java:780)
at net.sf.saxon.style.StyleElement.allocateLocalSlots(StyleElement.java:1640)
at net.sf.saxon.style.XSLTemplate.optimize(XSLTemplate.java:821)
at net.sf.saxon.style.PrincipalStylesheetModule.optimizeTopLevel(PrincipalStylesheetModule.java:1373)
at net.sf.saxon.style.PrincipalStylesheetModule.compile(PrincipalStylesheetModule.java:1223)
at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:244)
at net.sf.saxon.style.StylesheetModule.loadStylesheet(StylesheetModule.java:256)
at net.sf.saxon.style.Compilation.compileSingletonPackage(Compilation.java:101)
at net.sf.saxon.s9api.XsltCompiler.compile(XsltCompiler.java:813)
at net.sf.saxon.jaxp.SaxonTransformerFactory.newTemplates(SaxonTransformerFactory.java:176)

John Lumley reported: I can reproduce this fault from my DITA-OT configuration. Unsurprisingly it only occurs with optimisation (i.e. disappears on -opt:0). Will investigate a bit further.