Saxon

I tried to use one of the packages presented today at Balisage using fn:transform:

declare namespace output = "http://www.w3.org/2010/xslt-xquery-serialization";

declare option output:method 'json';
declare option output:indent 'yes';

transform(
    map {
        'package-name': 'http://www.obdurodon.org/linear-algebra-lib',
        'initial-function': QName('http://www.obdurodon.org', 'transpose-matrix'),
        'function-params': [[[1, 2], [3, 4]]],
        'delivery-format': 'raw',
        'vendor-options': map {
            QName('http://saxon.sf.net/', 'configuration'): doc('https://raw.githubusercontent.com/djbpitt/plot/master/he-config.xml')
        }
    }
)?output

SaxonHE10-1J doesn't like that attempt and outputs:

nulljava.lang.NullPointerException
        at net.sf.saxon.style.PackageVersionRanges.<init>(PackageVersionRanges.java:88)
        at net.sf.saxon.s9api.XsltCompiler.obtainPackage(XsltCompiler.java:750)
        at net.sf.saxon.functions.TransformFn.getStylesheet(TransformFn.java:496)
        at net.sf.saxon.functions.TransformFn.call(TransformFn.java:613)
        at net.sf.saxon.expr.FunctionCall.iterate(FunctionCall.java:543)
        at net.sf.saxon.expr.Expression.evaluateItem(Expression.java:852)
        at net.sf.saxon.expr.LookupExpression.iterate(LookupExpression.java:330)
        at net.sf.saxon.expr.Expression.process(Expression.java:949)
        at net.sf.saxon.query.XQueryExpression.run(XQueryExpression.java:453)
        at net.sf.saxon.s9api.XQueryEvaluator.run(XQueryEvaluator.java:370)
        at net.sf.saxon.Query.runQuery(Query.java:895)
        at net.sf.saxon.Query.doQuery(Query.java:423)
        at net.sf.saxon.Query.main(Query.java:97)
Fatal error during query: java.lang.NullPointerException:  (no message)

When I add a package-version, as in

transform(
    map {
        'package-name': 'http://www.obdurodon.org/linear-algebra-lib',
        'package-version': '1.0',
        'initial-function': QName('http://www.obdurodon.org', 'transpose-matrix'),
        'function-params': [[[1, 2], [3, 4]]],
        'delivery-format': 'raw',
        'vendor-options': map {
            QName('http://saxon.sf.net/', 'configuration'): doc('https://raw.githubusercontent.com/djbpitt/plot/master/he-config.xml')
        }
    }
)?output

the code works fine with that Saxon version.

https://www.w3.org/TR/xpath-functions/#func-transform says you need to provide "package-name plus optionally package-version" and says about package-version:

The version of the top-level stylesheet package to be invoked. [...] Default: "*" (any version)

Doesn't that mean the attempt not providing a package-version should work?