another filter problem

[pfps]

Filters in subqueries only appear to work correctly if they in the first subquery.
I put together a several small examples to show the problem.

[Again, uploading problems - I'll put the example in a separate comment.]

[pfps]

import rdflib

dataGraph = rdflib.Graph()

print "SINGLE QUERY"
query = """SELECT  ?this  WHERE {  
    VALUES ?this { <http://ex.com/a> "HI" }
    FILTER ( ! isBlank(?this) ) 
}"""
result = dataGraph.query(query)
for row in result : print row
assert len(result) > 0

print "NO FILTER"
query = """
SELECT  ?this
WHERE { 
    { SELECT ?this WHERE {  
        VALUES ?this { <http://ex.com/a>  "HI"  }
      } } 
    { SELECT ?this WHERE {  
        VALUES ?this { <http://ex.com/a> "HI" }
      } } 
}"""
result = dataGraph.query(query)
for row in result : print row
assert len(result) > 0

print "FILTER in first subquery"
query = """
SELECT  ?this
WHERE { 
    { SELECT ?this WHERE {  
        VALUES ?this { <http://ex.com/a>  "HI"  }
        FILTER ( isIRI(?this) )
      } } 
    { SELECT ?this WHERE {  
        VALUES ?this { <http://ex.com/a> "HI" }
      } } 
}"""
result = dataGraph.query(query)
for row in result : print row
assert len(result) > 0

print "FILTER in second subquery"
query = """
SELECT  ?this
WHERE { 
    { SELECT ?this WHERE {  
        VALUES ?this { <http://ex.com/a> "HI" }
      } } 
    { SELECT ?this WHERE {  
        VALUES ?this { <http://ex.com/a>  "HI"  }
        FILTER ( isIRI(?this) )
      } } 
}"""
result = dataGraph.query(query)
for row in result : print row
assert len(result) > 0

[gromgull]

Thanks a lot for a very clearly diagnosed problem @pfps !

Fixed in acc6ed3