XQuery: Unexpected exception of mapping double attributes

[Twilight-Shuxin]

Description of the Problem

Given this XML document:

<T id="1" a="1" b="1"/>

and XPath Query

boolean(count(//*[@id="1"] ! (@a, @b)))

BaseX throws exception:
[XPTY0019] (@A | @b): node expected, xs:boolean found: true().

Expected Behavior

Should return true as Saxon and eXist-DB.

Steps to Reproduce the Behavior

1. Create database create database test <T id="1" a="1" b="1"/>
2. Execute XPath query xquery boolean(count(//*[@id="1"] ! (@a, @b)))

Do you have an idea how to solve the issue?

No response

What is your configuration?

BaseX version: BaseX 10.7 beta latest commit 081fb4d on Windows

[ChristianGruen]

Thanks for all the bug reports. I'll look at them in around 10 days. Keep on going ;)

[Twilight-Shuxin]

@ChristianGruen Thanks a lot! :)