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https://issues.apache.org/jira/browse/JENA-1376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16100914#comment-16100914
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james michael dupont commented on JENA-1376:
--------------------------------------------
but to answer the question, no I dont need this and I have a work
around, this was an accidental crash and you do not need to support
it.
The big chain across all nodes is the linked list of global objects in
the compiler, and normally we dont want to traverse it.
On Tue, Jul 25, 2017 at 5:10 PM, Mike Dupont
--
James Michael DuPont
> FUSEKI recursive stack overflow crash on * query in optional where clause
> -------------------------------------------------------------------------
>
> Key: JENA-1376
> URL: https://issues.apache.org/jira/browse/JENA-1376
> Project: Apache Jena
> Issue Type: Bug
> Reporter: james michael dupont
>
> changing
> {noformat}
> ?b_args2 gcc:chain ?b_args3.
> {noformat}
> to
> {noformat}
> ?b_args2 gcc:chain* ?b_args3.
> {noformat}
> causes a 500 error see http://paste.debian.net/977429/ for the full stack.
> at
> org.apache.jena.sparql.path.eval.PathEngineSPARQL.ALP_1(PathEngineSPARQL.java:133)
> {noformat}
> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> PREFIX gcc:
> <https://h4ck3rm1k3.github.io/gogccintro/gcc/ontology/2017/05/20/gcc_compiler.owl#>
> PREFIX owl: <http://www.w3.org/2002/07/owl#>
> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
> select distinct
> ?b
> ?b_name_string
> ?b_args ?b_args_type ?b_args_name_string ?b_args2_name_string
> ?b_args3_name_string
> where {
>
> optional {
> ?b_args2 gcc:chain* ?b_args3.
> ?b_args3_name gcc:strg ?b_args3_name_string.
> ?b_args3 gcc:name ?b_args3_name.
> ?b_args3 rdf:type gcc:parm_decl.
> }
>
> optional {
> ?b_args gcc:chain ?b_args2.
> ?b_args2_name gcc:strg ?b_args2_name_string.
> ?b_args2 gcc:name ?b_args2_name.
> ?b_args2 rdf:type gcc:parm_decl.
> }
>
> ?b_args_name gcc:strg ?b_args_name_string.
> ?b_args gcc:name ?b_args_name.
> ?b_args rdf:type gcc:parm_decl.
>
> ?b rdf:type gcc:function_decl.
> ?b gcc:scpe ?a.
> ?b gcc:name ?b_name.
> ?b gcc:args ?b_args.
> ?b_name gcc:strg ?b_name_string.
> ?a rdf:type gcc:translation_unit_decl.
>
> }
> limit 10
> {noformat}
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