Hi Jean-Marc,
the bug you encountered is due to a newly feature (called “function inlining”) we’ve introduced just recently. It will be fixed soon [2]. Until then, you can simply disable it by setting INLINELIMIT to 0 [1] This can e.g. be done by choosing »Command« in the dropdown box of the GUI main window, and executing the command »SET INLINELIMIT 0«.
Thanks for the reproducible code, Christian
[1] http://docs.basex.org/wiki/Options#INLINELIMIT [2] https://github.com/BaseXdb/basex/issues/796 ___________________________
On Fri, Nov 22, 2013 at 10:28 AM, jean-marc Mercier jeanmarc.mercier@gmail.com wrote:
Hi,
Within my environment, I am experiencing some frustrating behavior of the Xquery Basex engine. I've done my best to single out the problem in the following XQUERY code :
declare function local:wtf($x as item() ) {function() { $x}}; declare function local:dummy($f,$x) { if(fn:empty($f())) then local:wtf($x) else local:wtf(())};
declare variable $insert := local:dummy(function(){ () }, function() { (), ()} ); fn:count($insert())
The issues are :
- executing this code yields an "Improper use? Potential bug?" exception
(see details further on). 2) If I change the execution query to be fn:count(local:dummy(function(){ () }, function() { (), ()} )()) ( I just copy and pasted the value of $insert into the fn:count(..) ) then the query is executed normally, returning "1". 3) If I change the function declaration local:wtf as follow declare function local:wtf($x) {function() { $x}}; (I just removed "as item()"), then the query is executed normally, returning "1".
Can you reproduce it with another environment ?
Cheers,
Jean-Marc
Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 7.8 beta 6aeaebf Java: Oracle Corporation, 1.7.0_05 OS: Windows 7, amd64 Stack Trace: java.lang.NullPointerException at org.basex.query.value.item.FuncItem.inlineExpr(FuncItem.java:308) at org.basex.query.func.DynFuncCall.optimize(DynFuncCall.java:58) at org.basex.query.func.DynFuncCall.compile(DynFuncCall.java:39) at org.basex.query.expr.Arr.compile(Arr.java:40) at org.basex.query.func.StandardFunc.compile(StandardFunc.java:60) at org.basex.query.MainModule.compile(MainModule.java:63) at org.basex.query.QueryCompiler.compile(QueryCompiler.java:70) at org.basex.query.QueryCompiler.compile(QueryCompiler.java:61) at org.basex.query.QueryContext.analyze(QueryContext.java:270) at org.basex.query.QueryContext.compile(QueryContext.java:253) at org.basex.query.QueryProcessor.compile(QueryProcessor.java:71) at org.basex.core.cmd.AQuery.query(AQuery.java:81) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:323) at org.basex.core.Command.execute(Command.java:92) at org.basex.server.LocalSession.execute(LocalSession.java:121) at org.basex.server.Session.execute(Session.java:37) at org.basex.core.Main.execute(Main.java:146) at org.basex.BaseX.<init>(BaseX.java:119) at org.basex.BaseX.main(BaseX.java:38)
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