Property path wildcard query result changed from 5.0.3 to 5.0.4

Support Bug
1

To me this looks like a regression from 5.0.3 to 5.0.4, in that I expected the result from 5.0.3 as the correct one. To reproduce:

Create a database with the following data:

@prefix : <http://example.com#> .

:study1 a :Study ;
  rdfs:label "study 1" ;
  .

:donor1 a :Donor ;
  rdfs:label "donor 1" ;
  :isClassifiedBy :study1 ;
  .

:sample1 a :CollectedSample ;
  rdfs:label "sample 1" ;
  :isClassifiedBy :study1 ;
  .

:sample2 a :CollectedSample ;
  rdfs:label "sample 2" ;
  :wasDerivedFrom :donor1 ;
  .

And run the following query:

PREFIX : <http://example.com#>

SELECT
        *
WHERE {
        VALUES ?studyIRI { :study1 }
        ?studyIRI a :Study ;
                rdfs:label ?studyLabel .
        ?sampleIRI a :CollectedSample ;
                :wasDerivedFrom * / :isClassifiedBy ?studyIRI ;
                rdfs:label ?sampleLabel
}

On a 5.0.3 server I get what I expect; two results:

+---------------------------+------------+----------------------------+-------------+
|         studyIRI          | studyLabel |         sampleIRI          | sampleLabel |
+---------------------------+------------+----------------------------+-------------+ 
| http://example.com#study1 | "study 1"  | http://example.com#sample2 | "sample 2"  |
| http://example.com#study1 | "study 1"  | http://example.com#sample1 | "sample 1"  |
+---------------------------+------------+----------------------------+-------------+

But for a database created on 5.0.4 I get only one result:

+---------------------------+------------+----------------------------+-------------+
|         studyIRI          | studyLabel |         sampleIRI          | sampleLabel |
+---------------------------+------------+----------------------------+-------------+
| http://example.com#study1 | "study 1"  | http://example.com#sample1 | "sample 1"  |
+---------------------------+------------+----------------------------+-------------+
2

Thanks, Conrad, for the test case.

5.0.4 indeed had some issues with property paths but I just verified that this query returns the expected number of results with the Stardog build which is going to be released this week.

Cheers,
Pavel