Saxon

The attached stylesheet, when invoked with this command:

java -jar ~/Downloads/saxon9ee.jar -s:void.xml bug.saxon96.generatebytecode.xsl

fails during compilation with the following stack trace:

**** endMethod failed
Exception in thread "main" java.lang.AssertionError: The Label: returnNullItem has been used but not marked
	at com.saxonica.ee.bytecode.util.GeneratedMethodInfo.checkLabels(GeneratedMethodInfo.java:147)
	at com.saxonica.ee.bytecode.util.CompilerService.popCurrentMethodInfo(CompilerService.java:841)
	at com.saxonica.ee.bytecode.FilterExpressionCompiler.makeFilterIteratorClass(FilterExpressionCompiler.java:458)
	at com.saxonica.ee.bytecode.FilterExpressionCompiler.compileToIterator(FilterExpressionCompiler.java:369)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToIterator(CompilerService.java:739)
	at com.saxonica.ee.bytecode.BlockCompiler$1.generateCase(BlockCompiler.java:222)
	at com.saxonica.objectweb.asm.commons.GeneratorAdapter.tableSwitch(Unknown Source)
	at com.saxonica.objectweb.asm.commons.GeneratorAdapter.tableSwitch(Unknown Source)
	at com.saxonica.ee.bytecode.BlockCompiler.makeNextMethod(BlockCompiler.java:277)
	at com.saxonica.ee.bytecode.BlockCompiler.generateBlockIterator(BlockCompiler.java:124)
	at com.saxonica.ee.bytecode.BlockCompiler.compileToIterator(BlockCompiler.java:86)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToIterator(CompilerService.java:739)
	at com.saxonica.ee.bytecode.BlockCompiler$1.generateCase(BlockCompiler.java:222)
	at com.saxonica.objectweb.asm.commons.GeneratorAdapter.tableSwitch(Unknown Source)
	at com.saxonica.objectweb.asm.commons.GeneratorAdapter.tableSwitch(Unknown Source)
	at com.saxonica.ee.bytecode.BlockCompiler.makeNextMethod(BlockCompiler.java:277)
	at com.saxonica.ee.bytecode.BlockCompiler.generateBlockIterator(BlockCompiler.java:124)
	at com.saxonica.ee.bytecode.BlockCompiler.compileToIterator(BlockCompiler.java:86)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToIterator(CompilerService.java:739)
	at com.saxonica.ee.bytecode.CardinalityCheckerCompiler.compileToIterator(CardinalityCheckerCompiler.java:126)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToIterator(CompilerService.java:739)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToByteCode(CompilerService.java:505)
	at com.saxonica.ee.bytecode.LetExpressionCompiler.makeClosure(LetExpressionCompiler.java:636)
	at com.saxonica.ee.bytecode.LetExpressionCompiler.compileCommonExpr(LetExpressionCompiler.java:177)
	at com.saxonica.ee.bytecode.ApplyTemplatesCompiler.compileParameterSet(ApplyTemplatesCompiler.java:144)
	at com.saxonica.ee.bytecode.CallTemplateCompiler.compileToPush(CallTemplateCompiler.java:70)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToPush(CompilerService.java:752)
	at com.saxonica.ee.bytecode.BlockCompiler.compileToPush(BlockCompiler.java:41)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToPush(CompilerService.java:752)
	at com.saxonica.ee.bytecode.CopyCompiler.compileCopyElement(CopyCompiler.java:493)
	at com.saxonica.ee.bytecode.CopyCompiler.compileToPush(CopyCompiler.java:76)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToPush(CompilerService.java:752)
	at com.saxonica.ee.bytecode.util.CompilerService.compileToByteCode(CompilerService.java:638)
	at com.saxonica.ee.optim.OptimizerEE.compileToByteCode(OptimizerEE.java:1334)
	at net.sf.saxon.style.XSLTemplate.generateByteCode(XSLTemplate.java:666)
	at net.sf.saxon.style.StylesheetPackage.compile(StylesheetPackage.java:1191)
	at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:201)
	at net.sf.saxon.style.Compilation.compileSingletonPackage(Compilation.java:94)
	at net.sf.saxon.s9api.XsltCompiler.compile(XsltCompiler.java:543)
	at net.sf.saxon.Transform.doTransform(Transform.java:601)
	at net.sf.saxon.Transform.main(Transform.java:80)

System:

Saxon-EE 9.6.0.1J from Saxonica

java version "1.6.0_65"

Mac OS X 10.10