February 2026 - BaseX-Talk - mailman.uni-konstanz.de

Bug where sorting arrays causes a type error?
by Nico Kutscherauer 11 Feb '26

11 Feb '26

Hi BaseX team, I have the following simple query: let $strings := ('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j') let $arrays as array(*)* := (array{1 to 2}, array{3 to 6}, array{7 to 9}) let $arrays := sort($arrays, (), fn($seq){array:size($seq) * -1}) let $largest := $arrays => head() return for $idx in $largest?* return $strings[$idx] When I execute it with BaseX 12.2 I get the following suprising error: [XPTY0004] One item expected, 4 found: (3 to 6). Much more suprising is that if I wrap the $arrays?* into a trace call it works: let $strings := ('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j') let $arrays as array(*)* := (array{1 to 2}, array{3 to 6}, array{7 to 9}) let $arrays := sort($arrays, (), fn($seq){array:size($seq) * -1}) let $largest := $arrays => head() return for $idx in *trace($largest?*)* return $strings[$idx] Result: c d e f The root cause seems to be the sort function. Because if I remove that line it works without the trace. Best Regards, Nico -- Nico Kutscherauer XML Developer data2type GmbH Im Breitspiel 6A 69126 Heidelberg Tel.: +49-(0)6221-73 912 60 www.data2type.de <https://www.data2type.de> Workingdays: Tue/Wed/Thu/Fri(HO) Workinghours: 10-18.30 Company’s head office: Heidelberg Commercial Register court: AG Mannheim HRB 715195 CEO: Manuel Montero Pineda

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BaseX-12.1: HTML 5.0 serialization difference
by ron.vdbranden＠gmail.com 05 Feb '26

05 Feb '26

Hi, I've noticed a serialization difference since updating to BaseX-12.1, and am wondering if this is intentional or not. When serializing as HTML 5.0, the character escaping in <script> tags seems to be influenced by the presence of preceding <script> tags that are either empty or only contain collapsible whitespace: * when a <script> element follows a non-empty (or non-collapsible) <script> element, special characters like &, <, and > are unescaped in the output o input: <head> <script><![CDATA[& < > ]]></script> <script src="test">//</script> <script>& < ></script> </head> ! serialize(., map {"method":"html", "version":"5.0"}) o output: <head> <meta charset="UTF-8"> <script>& < > </script> <script src="test">//</script> <script>& < ></script> </head> * when, however, a <script> element follows an empty (or collapsible) <script> element, special characters like &, <, and > are escaped in the output o input: <head> <script><![CDATA[& < > ]]></script> *<script src="test"></script>* <script>& < ></script> </head> ! serialize(., map {"method":"html", "version":"5.0"}) o output: <head> <meta charset="UTF-8"> <script>& < > </script> <script src="test">//</script> <script>*& < >*</script> </head> I'm wondering if this is intentional or a bug? Best, Ron

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job:execute with unit:test stalls
by Lizzi, Vincent 04 Feb '26

04 Feb '26

Hi BaseX team, The new job:execute function in BaseX 12 is incredibly useful. Using job:execute, it's now possible to have a query that fetches data, dynamically computes the names of databases, creates the databases, populates the databases, and then reads from the same databases, all contained in one query or module!!! This can greatly simplify processes that previously required multiple steps. I'm running into trouble when trying to use %unit:test to test code that uses job:execute. Running the test causes a deadlock, even though the code works correctly when run on its own. Here is a small example based on the example in the documentation https://docs.basex.org/main/Job_Functions#job:execute This query produces "true" when run in BaseX GUI. job:execute('db:create("test")'), job:execute('db:put-value("test", 1 to 10, "numbers")'), job:execute('db:get-value("test", "numbers")') = (1 to 10) After adding %unit:test and unit:assert, when this test is run in BaseX GUI it stalls (until I click Stop to interrupt the process). module namespace t = "test"; declare %unit:test function t:test01 () { job:execute('db:create("test")'), job:execute('db:put-value("test", 1 to 10, "numbers")'), unit:assert(job:execute('db:get-value("test", "numbers")') = (1 to 10)) }; Should this work, or am I missing something? The documentation mentions to be careful to avoid deadlocks with updating queries. I've also found that a deadlock can occur when the main query uses fn:doc even if unrelated to job:execute, but this can be solved by wrapping fn:doc in job:execute. I haven't found a way to work around deadlocks that occur with %unit:test. I'm using BaseX version 12.2. Many thanks, Vincent ______________________________________________ Vincent M. Lizzi Head of Information Standards | Taylor & Francis Group E-Mail: vincent.lizzi(a)taylorandfrancis.com<mailto:vincent.lizzi@taylorandfrancis.com> Web: www.tandfonline.com<http://www.tandfonline.com/> Time zone: US Eastern Taylor & Francis is a trading name of Informa UK Limited, registered in England under no. 1072954 "Everything should be made as simple as possible, but not simpler." [cid:498c7d70-ddef-4485-9ad7-484411b1c0f5]<https://outlook.office.com/bookwithme/user/aa80d42cbb5b46dba06a5ad241d7665b…> Book time to meet with me<https://outlook.office.com/bookwithme/user/aa80d42cbb5b46dba06a5ad241d7665b…> Information Classification: General

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C++ Client, Access to port 1984 denied after crash
by Ben Engbers 03 Feb '26

03 Feb '26

Hi, When using localhome, my libBasexTest executes this test without problems: cout << "\n4 Add content from a directory" << endl; string path; path.append(filesystem::read_symlink(exe_path).parent_path()).append("/src/extdata/xml_files"); for (const auto & entry : filesystem::directory_iterator(path)) { Session.Add("Add_XML_3", entry.path()); }; And 12 xml-files are added. But when I connect to a remote linux-based basexserver, I have to add: int limit = 11; int count = 0; for (const auto & entry : filesystem::directory_iterator(path)) { if (count > limit) break; Session.Add("Add_XML_3", entry.path()); count++; }; Without the 'if (count > limit) break;' libBasexTest crashes. And without test \n4 there are no errors. Strange... This is not the biggest problem. After crashing, on the remote server access to port 1984 is denied. I can't restart basexhttp nor basexserver. Both commands abort with the message that access to port 1984 is denied. Deleting the basex-tree and rebooting the remote machine is the only way to restart one off both services. What is the best way to resore connection to port 1984? Ben PS. After starting basexhttp - without a trailing & - I don't return to the prompt. Is this intentional? -- Ben Engbers Grietjeshof 77 6721 VH Bennekom +31 6 23634840

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Re: Web pages rendering issue on https://files.basex.org
by ykhabins＠bellsouth.net 03 Feb '26

03 Feb '26

Here is the attached screenshots to present the issue. Regards, Yitzhak Khabinsky

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Difficult for me to understand
by Marco Lettere 03 Feb '26

03 Feb '26

Hi Christian and all, I'm experiencing a weird issue with a RestXQ service of mine which was working and suddenly starts having problems because it just stops serving requests. I know about SSCE and so on but this time it's hard to reproduce. Shortly, it receives about 5 simultaneous requests and for each of those it calls one xquery:fork-join (5 functions) to query another service. I cannot say what the error is exactly during the time when it is stuck. What I can see on the client are, besides HTTP 503 and Read Timeouts, the following logs which appear frequently but with no particular order: ERROR: Unexpected error: java.lang.NullPointerException: Cannot invoke "org.basex.util.hash.WeakTokenSet$WeakTokenRef.get()" because "this.keys[index]" is null (hint: /...y/webapp/nubisware.muscle.fiber.ccp_admin/ccp_worker_sk.xqm@65:33) ERROR: Unexpected error: java.lang.ArrayIndexOutOfBoundsException (hint: /.../webapp/nubisware.muscle.fiber.ccp_admin/ccp_worker_sk.xqm@65:33) ERROR: Unexpected error: java.lang.ArrayIndexOutOfBoundsException: Index 8 out of bounds for length 8 (hint: /.../webapp/nubisware.muscle.fiber.ccp_admin/ccp_worker_sk.xqm@65:33) Line and column numbers point always to the same xquery:fork-join call. Can you point me to what I should investigate? Am I hitting some quantitative limit on concurrency? Connections? Thank you for any help because I'm currently wandering in the darkness :-) Regards, Marco.

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Cannot add a folder with HTML files as binaries that contain '[', ']', '{' or '}' in their file names
by joerg.hakenjos＠etas.com 02 Feb '26

02 Feb '26

Hi BaseX team! When I try to add a HTML file that contains '[', ']', '{' or '}' in its file name (like "Test[].html") by selecting its parent folder, then I get an error message like this: Resource "C:\Program Files (x86)\BaseX\file:\C:\Test\Test[].html (The filename, directory name, or volume label syntax is incorrect)" not found. It seems that in this case the current BaseX working directory is prefixed to the actual path. This happens when I set "Import format" to RAW or when I set "Import format" to anything but HTML and check "Add other files as binary files" in the GUI. When I set "Import format" to HTML or XML then the file is added to the databse. With the command line the behaviour is the same when trying to add Test[].html in C:\Test\: BaseX 12.2 [Standalone] Try 'help' to get more information. > CREATE DB Test Database 'Test' created in 10.91 ms. > OPEN Test Database 'Test' was opened in 0.02 ms. > SET PARSER raw PARSER: raw > SET CREATEFILTER * CREATEFILTER: * > ADD "C:\Test\" Resource "C:\Program Files (x86)\BaseX\bin\file:\C:\Test\Test[].html (The filename, directory name, or volume label syntax is incorrect)" not found. !--- Manually renamed Test[].html to Test.html ---! > ADD "C:\Test\" Resource(s) added in 2.6 ms. I assume that !#$%&'()+-=@[]^_{}~ are valid characters for file names in BaseX. Am I getting something wrong or might this be a bug? I used the BaseX122.exe installer on Windows 11. BaseX119 and BaseX123-20260129.122524 behave the same.

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