Hi all,

it seems that this bug is linked to the introspection module. I isolated a code that produces on my config a exception, see at end of mail. Note : - It seems to be a regression, as this code worked finely with the 3/12 version of BaseX. - It took me a whole day to isolate this exception. This "overhead" is due to the JAVA catch / raising exception BaseX mechanism, letting the user blind with its XQUERY code. As bugs are becoming harder and harder to spot, maybe we should think about a way, or a tool, to easen trace / debug while the interpreter raises a JAVA exception ?

Cheers

declare function local:map_inspect_functions() { map:new(for $fun in inspect:functions() return map:entry(local:name-function($fun),$fun)) }; declare function local:name-function($fun){fn:data(inspect:function($fun)/@name)}; declare function local:get_void() { function(){ () }}; declare variable $local:MapIntrospecting := local:map_inspect_functions(); let $fun_2 := map:get($local:MapIntrospecting,"local:get_void") return count($fun_2())

Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 7.8 beta 132460f Java: Oracle Corporation, 1.7.0_45 OS: Windows 7, amd64 Stack Trace: java.lang.ClassCastException: org.basex.query.value.type.AtomType cannot be cast to org.basex.query.value.type.FuncType at org.basex.query.func.InlineFunc.item(InlineFunc.java:261) at org.basex.query.func.InlineFunc.value(InlineFunc.java:280) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:130) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.func.FuncCall.iter(FuncCall.java:57) at org.basex.query.QueryContext.iter(QueryContext.java:355) at org.basex.query.func.FNAggr.item(FNAggr.java:36) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.MainModule.iter(MainModule.java:96) at org.basex.query.QueryContext.iter(QueryContext.java:309) at org.basex.query.QueryProcessor.iter(QueryProcessor.java:81) at org.basex.core.cmd.AQuery.query(AQuery.java:89) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:329) at org.basex.core.Command.execute(Command.java:94) 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)

2014/1/6 jean-marc Mercier jeanmarc.mercier@gmail.com

Note : casewhere, I checked that this issue does not depend upon the values of INLINELIMIT and TAILCALL.

2014/1/6 jean-marc Mercier jeanmarc.mercier@gmail.com

...

Hello,

I have a quite strange behavior, that might be a bug in the introspection module. I am just describing it, and will work a bit to produce a reproductible code if you don't have a quick clue about the problem.

I created a map of string to functions, called $common:MapIntrospecting, generated by the introspection module.

The following code works perfectly (you can't run it, but believe me :)

declare variable $map := map:entry("Alimentation:nodes#1",Alimentation:nodes#1); declare variable $nodes := a big node...

let $fun_1 := map:get($map,"Alimentation:nodes#1") let $fun_2 := map:get($common:MapIntrospecting,"Alimentation:nodes#1") return $fun_2($nodes)

And now, the following code (I just cut the useless first line) produces a spurious and ferocious exception

let $fun_2 := map:get($common:MapIntrospecting,"Alimentation:nodes#1") return $fun_2($nodes)

Any clue ?

Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 7.8 beta 132460f Java: Oracle Corporation, 1.7.0_45 OS: Windows 7, amd64 Stack Trace: java.lang.ClassCastException: org.basex.query.value.type.AtomType cannot be cast to org.basex.query.value.type.FuncType at org.basex.query.func.InlineFunc.item(InlineFunc.java:261) at org.basex.query.func.InlineFunc.value(InlineFunc.java:280) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.var.StaticVar.value(StaticVar.java:129) at org.basex.query.var.StaticVarRef.value(StaticVarRef.java:58) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.expr.List.value(List.java:133) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:130) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.MainModule.value(MainModule.java:79) at org.basex.query.QueryContext.value(QueryContext.java:323) at org.basex.query.QueryContext.iter(QueryContext.java:309) at org.basex.query.QueryProcessor.iter(QueryProcessor.java:81) at org.basex.core.cmd.AQuery.query(AQuery.java:89) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:329) at org.basex.core.Command.execute(Command.java:94) 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)

Hi Jean-Marc,

I’ve further simplified your example to the following query:

declare function local:f() { function() { () } }; inspect:functions()()

We’ll let you know as soon as this bug is fixed [1].

Christian

[1] https://github.com/BaseXdb/basex/issues/839

On Fri, Jan 10, 2014 at 4:36 AM, jean-marc Mercier jeanmarc.mercier@gmail.com wrote:

Hi all,

it seems that this bug is linked to the introspection module. I isolated a code that produces on my config a exception, see at end of mail. Note :

• It seems to be a regression, as this code worked finely with the 3/12

version of BaseX.

• It took me a whole day to isolate this exception. This "overhead" is due

to the JAVA catch / raising exception BaseX mechanism, letting the user blind with its XQUERY code. As bugs are becoming harder and harder to spot, maybe we should think about a way, or a tool, to easen trace / debug while the interpreter raises a JAVA exception ?

Cheers

declare function local:map_inspect_functions() { map:new(for $fun in inspect:functions() return map:entry(local:name-function($fun),$fun)) }; declare function local:name-function($fun){fn:data(inspect:function($fun)/@name)}; declare function local:get_void() { function(){ () }}; declare variable $local:MapIntrospecting := local:map_inspect_functions(); let $fun_2 := map:get($local:MapIntrospecting,"local:get_void") return count($fun_2())

Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 7.8 beta 132460f Java: Oracle Corporation, 1.7.0_45 OS: Windows 7, amd64 Stack Trace: java.lang.ClassCastException: org.basex.query.value.type.AtomType cannot be cast to org.basex.query.value.type.FuncType at org.basex.query.func.InlineFunc.item(InlineFunc.java:261) at org.basex.query.func.InlineFunc.value(InlineFunc.java:280) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:130) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.func.FuncCall.iter(FuncCall.java:57) at org.basex.query.QueryContext.iter(QueryContext.java:355) at org.basex.query.func.FNAggr.item(FNAggr.java:36) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.MainModule.iter(MainModule.java:96) at org.basex.query.QueryContext.iter(QueryContext.java:309) at org.basex.query.QueryProcessor.iter(QueryProcessor.java:81) at org.basex.core.cmd.AQuery.query(AQuery.java:89) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:329) at org.basex.core.Command.execute(Command.java:94) 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)

2014/1/6 jean-marc Mercier jeanmarc.mercier@gmail.com

...

Note : casewhere, I checked that this issue does not depend upon the values of INLINELIMIT and TAILCALL.

2014/1/6 jean-marc Mercier jeanmarc.mercier@gmail.com

...

Hello,

I have a quite strange behavior, that might be a bug in the introspection module. I am just describing it, and will work a bit to produce a reproductible code if you don't have a quick clue about the problem.

I created a map of string to functions, called $common:MapIntrospecting, generated by the introspection module.

The following code works perfectly (you can't run it, but believe me :)

declare variable $map := map:entry("Alimentation:nodes#1",Alimentation:nodes#1); declare variable $nodes := a big node...

let $fun_1 := map:get($map,"Alimentation:nodes#1") let $fun_2 := map:get($common:MapIntrospecting,"Alimentation:nodes#1") return $fun_2($nodes)

And now, the following code (I just cut the useless first line) produces a spurious and ferocious exception

let $fun_2 := map:get($common:MapIntrospecting,"Alimentation:nodes#1") return $fun_2($nodes)

Any clue ?

Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 7.8 beta 132460f Java: Oracle Corporation, 1.7.0_45 OS: Windows 7, amd64 Stack Trace: java.lang.ClassCastException: org.basex.query.value.type.AtomType cannot be cast to org.basex.query.value.type.FuncType at org.basex.query.func.InlineFunc.item(InlineFunc.java:261) at org.basex.query.func.InlineFunc.value(InlineFunc.java:280) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.var.StaticVar.value(StaticVar.java:129) at org.basex.query.var.StaticVarRef.value(StaticVarRef.java:58) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:154) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.expr.List.value(List.java:133) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:203) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:130) at org.basex.query.func.FuncCall.invoke(FuncCall.java:96) at org.basex.query.func.FuncCall.value(FuncCall.java:52) at org.basex.query.QueryContext.value(QueryContext.java:366) at org.basex.query.MainModule.value(MainModule.java:79) at org.basex.query.QueryContext.value(QueryContext.java:323) at org.basex.query.QueryContext.iter(QueryContext.java:309) at org.basex.query.QueryProcessor.iter(QueryProcessor.java:81) at org.basex.core.cmd.AQuery.query(AQuery.java:89) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:329) at org.basex.core.Command.execute(Command.java:94) 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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