Bug #6256: function-name returns an empty sequence for node-name#0, string#0 and more? - Saxon - Saxonica Developer Community

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Bug #6256

closed

function-name returns an empty sequence for node-name#0, string#0 and more?

Added by Nico Kutscherauer 6 months ago. Updated 6 months ago.

Status:

Resolved

Priority:

Normal

Assignee:

Michael Kay

Category:

XPath conformance

Sprint/Milestone:

Start date:

2023-11-20

Due date:

% Done:

Estimated time:

Legacy ID:

Applies to branch:

11, 12, trunk

Fix Committed on Branch:

11, 12, trunk

Fixed in Maintenance Release:

12.4

Platforms:

.NET, Java

Description

Hi,

I was faced with a strange behavior of Saxon 12: The XPath expression function-name(node-name#0) returns an empty sequence. In oposite function-name(node-name#1) returns fn:node-name. Same for string#0, though position#0 returns fn:position as expected.

I demonstrate it in this GitHub project:

https://github.com/nkutsche/saxon-issue-function-name-zero-arg/blob/main/src/main/resources/xsl/main.xsl

Here you see the result:

https://github.com/nkutsche/saxon-issue-function-name-zero-arg/actions/runs/6934049245/job/18861459121#step:4:19

Also interesting in Saxon 11 it returned anon instead of an empty sequence. See: https://github.com/nkutsche/saxon-issue-function-name-zero-arg/actions/runs/6934049245/job/18861459121#step:5:411

Is this a desired behavior?

Best Regards, Nico