Bugs found in lsqb

[acquamarin]

These queries are failing while running lsqb queries on ldbc dataset:
Q1:

MATCH (:Country)<-[:IS_PART_OF]-(:City)<-[:IS_LOCATED_IN]-(:Person)<-[:HAS_MEMBER]-(:Forum)-[:CONTAINER_OF]->(:Post)<-[:REPLY_OF]-(:Comment)-[:HAS_TAG]->(:Tag)-[:HAS_TYPE]->(:TagClass)
RETURN count(*) AS count

Bug: runs into an infinite loop

Q8:

MATCH (tag1:Tag)<-[:HAS_TAG]-(message:Message)<-[:REPLY_OF]-(comment:Comment)-[:HAS_TAG]->(tag2:Tag)
WHERE NOT (comment)-[:HAS_TAG]->(tag1)
  AND tag1 <> tag2
RETURN count(*) AS count

Bug: crashes with a C++ error ("RuntimeError: _Map_base::at)"
Q9:

MATCH (person1:Person)-[:KNOWS]-(person2:Person)-[:KNOWS]-(person3:Person)-[:HAS_INTEREST]->(tag:Tag)
WHERE NOT (person1)-[:KNOWS]-(person3)
  AND person1 <> person3
RETURN count(*) AS count

Bug: crashes with a segfault

Our loader also fails on a large dataset (> sf1)

[aziz-mu]

Update:
Q1 - is working as intended now.
Q8 - Still gives an Error: _Map_base::at
Q9 - Now gives an Error: Cannot infer the size of a variable dataType instead of a segfault

[aziz-mu]

Closing this issue - Q8 and Q9, as written, give Parser Exceptions (expected), and they can be translated to working queries using WHERE NOT EXISTS {} syntax, as in #1566