Saxon

I also tried it with a TraceListener like this:

public void testPipelineWithGlobalContextItem() {
	    // bug 4114: stylesheet in pipeline has global variable that uses the context item
        String xsl = "<xsl:stylesheet exclude-result-prefixes=\"#all\" xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" version=\"2.0\">\n"
                + "<xsl:variable name=\"supp\" as=\"xs:string\" select=\"root()/*/name()\"/>\n"
                + "\n"
                + "<xsl:template match=\"/\">\n"
                + "    <xsl:message select=\"$supp\"/>\n"
                + "    <file/>\n"
                + "</xsl:template>\n"
                + "</xsl:stylesheet>\n";

        try {
            // common processor
            Processor processor = new Processor(false);

            // transformer1
            XsltCompiler xslt_compiler1 = processor.newXsltCompiler();
            xslt_compiler1.setCompileWithTracing(true);

            XsltExecutable exec = xslt_compiler1.compile(new StreamSource(new StringReader(xsl)));

            XsltTransformer xslt_transformer1 = exec.load();
            xslt_transformer1.setSource(new StreamSource(new StringReader(xsl))); // itself
            xslt_transformer1.setTraceListener(new AbstractTraceListener() {
                @Override
                protected String getOpeningAttributes() {
                    return "";
                }

                @Override
                protected String tag(int construct) {
                    return "E" + construct;
                }
            });


            // transformer2
            XsltTransformer xslt_transformer2 = exec.load();

            // transformer2's destination
            Serializer destination2 = processor.newSerializer(System.out);
            xslt_transformer2.setDestination(destination2);
            xslt_transformer2.setTraceListener(new AbstractTraceListener() {
                @Override
                protected String getOpeningAttributes() {
                    return "";
                }

                @Override
                protected String tag(int construct) {
                    return "F" + construct;
                }
            });

            // transformer1's destination
            xslt_transformer1.setDestination(xslt_transformer2);

            xslt_transformer1.transform();
        } catch (SaxonApiException e) {
            e.printStackTrace();
            fail();
        }
    }

I now notice that although the test runs to completion, the xsl:message does generate an error message, which doesn't cause a fatal termination:

Error XPDY0002 while evaluating xsl:message at line 5 of : The context item is absent

I changed the xsl:message to xsl:comment and the failure becomes more visible.

Looks like I failed to update this tracker to record progress on this.

I made a change to AbstractXsltTransformer.getReceivingTransformer() that fixes this test case. But before committing the change, I need to check one or two regression test failures to be confident that they aren't related.