Main Page » Mailing List » July 2025

Bug related to copy/modify/return and java binding

Monday, 7 July 2025 · 2 messages · last reply 8 Jul 2025
AN
Andreas Hengsbach | nexoma7 Jul 2025 15:29 #

Hello everyone,

I have probably found a bug that is related to copy/modify/return and the java-binding. Anyway, I couldn't narrow down the problem any further.

With the following XQuery-Code I get the result “<A>0</A>” in BaseX 10.4 - as expected. In BaseX 12.0 I get an error message “Cannot invoke ”org.basex.query.func.XQFunction.arity()“ because ‘func’ is null”.

(: schnipp :)
declare namespace ll = "java:java.util.LinkedList";
declare variable $linkedList := ll:new();

copy $test := <A>{ll:size($linkedList)}</A>
modify ()
return $test
(: schnapp :)

Full StackTrace:

NullPointerException: Cannot invoke "org.basex.query.func.XQFunction.arity()" because "func" is null - [org.basex.query.func.FuncCall.value(FuncCall.java:47), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.up.expr.Transform.value(Transform.java:64), org.basex.query.expr.Pipeline.eval(Pipeline.java:96), org.basex.query.expr.Pipeline.value(Pipeline.java:81), org.basex.query.expr.List.value(List.java:205), org.basex.query.expr.If.value(If.java:159), org.basex.query.expr.List.value(List.java:209), org.basex.query.expr.Pipeline.value(Pipeline.java:82), org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:147), org.basex.query.expr.gflwor.Where$1.next(Where.java:41), org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:79), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.List$1.next(List.java:162), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.constr.Constr.add(Constr.java:73), org.basex.query.expr.constr.CElem.item(CElem.java:140), org.basex.query.expr.constr.CElem.item(CElem.java:32), org.basex.query.expr.ParseExpr.value(ParseExpr.java:54), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.expr.IterFilter$1.next(IterFilter.java:36), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.List$1.next(List.java:162), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.constr.Constr.add(Constr.java:73), org.basex.query.expr.constr.CElem.item(CElem.java:140), org.basex.query.expr.constr.CElem.item(CElem.java:32), org.basex.query.expr.ParseExpr.value(ParseExpr.java:54), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.expr.IterFilter.value(IterFilter.java:49), org.basex.query.expr.List.value(List.java:209), org.basex.query.expr.Try.value(Try.java:109), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.scope.MainModule.iter(MainModule.java:53), org.basex.query.QueryContext.lambda$iter$4(QueryContext.java:374), org.basex.query.QueryContext.run(QueryContext.java:770), org.basex.query.QueryContext.iter(QueryContext.java:374), org.basex.query.QueryProcessor.iter(QueryProcessor.java:97)

Many thanks and best regards Andreas

GR
Gunther Rademacher8 Jul 2025 13:55 #

Hi Andreas,

thank you for reporting this, and for the clear and concise reproduction.

The issue is now being addressed in the following pull request: https://github.com/BaseXdb/basex/pull/2455

Best regards, Gunther

Gesendet: Montag, 7. Juli 2025 um 15:29

Quoted text · Andreas Hengsbach | nexoma · 19 lines
Von: "Andreas Hengsbach | nexoma" <andreas.hengsbach at nexoma.com> An: "basex-talk at mailman.uni-konstanz.de" <basex-talk at mailman.uni-konstanz.de> Betreff: [basex-talk] Bug related to copy/modify/return and java binding Hello everyone, I have probably found a bug that is related to copy/modify/return and the java-binding. Anyway, I couldn't narrow down the problem any further. With the following XQuery-Code I get the result “<A>0</A>” in BaseX 10.4 - as expected. In BaseX 12.0 I get an error message “Cannot invoke ”org.basex.query.func.XQFunction.arity()“ because ‘func’ is null”. (: schnipp :) declare namespace ll = "java:java.util.LinkedList"; declare variable $linkedList := ll:new(); copy $test := <A>{ll:size($linkedList)}</A> modify () return $test (: schnapp :) Full StackTrace: NullPointerException: Cannot invoke "org.basex.query.func.XQFunction.arity()" because "func" is null - [org.basex.query.func.FuncCall.value(FuncCall.java:47), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.up.expr.Transform.value(Transform.java:64), org.basex.query.expr.Pipeline.eval(Pipeline.java:96), org.basex.query.expr.Pipeline.value(Pipeline.java:81), org.basex.query.expr.List.value(List.java:205), org.basex.query.expr.If.value(If.java:159), org.basex.query.expr.List.value(List.java:209), org.basex.query.expr.Pipeline.value(Pipeline.java:82), org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:147), org.basex.query.expr.gflwor.Where$1.next(Where.java:41), org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:79), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.List$1.next(List.java:162), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.constr.Constr.add(Constr.java:73), org.basex.query.expr.constr.CElem.item(CElem.java:140), org.basex.query.expr.constr.CElem.item(CElem.java:32), org.basex.query.expr.ParseExpr.value(ParseExpr.java:54), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.expr.IterFilter$1.next(IterFilter.java:36), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.List$1.next(List.java:162), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.constr.Constr.add(Constr.java:73), org.basex.query.expr.constr.CElem.item(CElem.java:140), org.basex.query.expr.constr.CElem.item(CElem.java:32), org.basex.query.expr.ParseExpr.value(ParseExpr.java:54), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.expr.IterFilter.value(IterFilter.java:49), org.basex.query.expr.List.value(List.java:209), org.basex.query.expr.Try.value(Try.java:109), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.scope.MainModule.iter(MainModule.java:53), org.basex.query.QueryContext.lambda$iter$4(QueryContext.java:374), org.basex.query.QueryContext.run(QueryContext.java:770), org.basex.query.QueryContext.iter(QueryContext.java:374), org.basex.query.QueryProcessor.iter(QueryProcessor.java:97) Many thanks and best regards Andreas

Written for BaseX 12.0. BaseX may have changed since: please check the current documentation.

« Upgraded from V9.7.3 to V12, problem in xQuery search when node has a blank lineProblem (BaseX 12) serializing a map with json:serialize() in combination with the http-client module »
⚡Generated with XQuery