Possibly incorrect result with count() on self loops

[pranet]

• Neo4j version: 3.0.4

• Operating system: El Capitan 10.11.13

• API/Driver: Cypher

• Steps to reproduce
  Create a graph using the following commands:
  create (n)-[r:CALL]->(n)
  create (n)-[r:CALL]->(n)
  create (u)-[r:CALL]->(v)

(Total 4 nodes, with 2 self loops, and one more edge)

Query A:
match(n)-[r:CALL]->(n)
return count(r)

• Expected behavior
  2
• Actual behavior
  3

Query B:
match(n)-[r:CALL]->(n)
where id(n) = id(n)
return count(r)

• Expected behavior
  2
• Actual behavior
  2

Query C:
match(n)-[r:CALL]->(n)
return r

• Expected behavior
  2 edges returned
• Actual behavior
  2 edges returned

Profiling for A gives the following

Seems to be completely ignoring the match clause. Query B, and C work as expected however.

[spacecowboy]

I agree. The result for Query A is surprising. Thanks for the report.