Reification inside CONSTRUCT is not accepting breakline before partial statements

[rogerlucena]

When doing reification inside a CONSTRUCT clause with partial statements, as documented here, BQL yields a parsing error if a breakline is used before the partial statements.

To illustrate, the following code for reification with CONSTRUCT works:

CONSTRUCT {
  ?ancestor "grandparent"@[] ?grandchildren ; "both_live_in"@[] /city<NY>
}
INTO ?grandparents
FROM ?family
WHERE {
  ?ancestor "parent_of"@[] ?c .
  ?c "parent_of"@[] ?grandchildren
};

But the following code does not:

CONSTRUCT {
  ?ancestor "grandparent"@[] ?grandchildren ; 
            "both_live_in"@[] /city<NY>
}
INTO ?grandparents
FROM ?family
WHERE {
  ?ancestor "parent_of"@[] ?c .
  ?c "parent_of"@[] ?grandchildren
};

Yielding the following error message:

Processing statement (3/6):
CONSTRUCT { ?ancestor "grandparent"@[] ?grandchildren ;

[FAIL] [ERROR] Failed to parse BQL statement with error Parser.parse: Failed to consume symbol CONSTRUCT_FACTS, with error Parser.parse: Failed to consume symbol CONSTRUCT_TRIPLES, with error Parser.parse: Failed to consume symbol MORE_CONSTRUCT_PREDICATE_OBJECT_PAIRS, with error Parser.parse: Failed to consume symbol CONSTRUCT_PREDICATE, with error Parser.consume: could not consume token (EOF, , ) in production CONSTRUCT_PREDICATE

Processing statement (4/6):
"both_live_in"@[] /city<NY> } INTO ?grandparents FROM ?family WHERE { ?ancestor "parent_of"@[] ?c . ?c "parent_of"@[] ?grandchildren };

[FAIL] [ERROR] Failed to parse BQL statement with error Parser.consume: could not consume token (PREDICATE, "both_live_in"@[], ) in production START

It may be related with this part of the grammar.

You can use the code in the file below to reproduce the aforementioned error.

reification_breakline_error.pdf