Bug #6256
closed
function-name returns an empty sequence for node-name#0, string#0 and more?
0%
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:
Here you see the result:
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
Updated by Michael Kay about 1 year ago
- Category set to XPath conformance
- Assignee set to Michael Kay
- Priority changed from Low to Normal
- Platforms .NET, Java added
Thanks, I've added a test case to QT3 test set fn-function-name which confirms this as a bug.
The bug arises because references to context-dependent functions like fn:node-name#0 are actually compiled to an anonymous inline function with a closure, in effect let $var := . return function(){node-name($var)}, and the anonymous function of course has no function name.
Updated by Michael Kay about 1 year ago
- Status changed from New to Resolved
- Applies to branch 11, 12, trunk added
- Fix Committed on Branch 11, 12, trunk added
Fixed in ContextItemAccessorFunction.bindContext() by giving an explicit name to the constructed CallableFunction.
Updated by O'Neil Delpratt about 1 year ago
- Fixed in Maintenance Release 12.4 added
Bug fix applied in the Saxon 12.4 Maintenance release. Leaving it marked as 'Resolved' until fix applied on Saxon 11.
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