[TINKERPOP-2540] Unexpected count() step result

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Bug
• Affects Version/s: 3.4.10
• Component/s: process, tinkergraph
• Environment: OS: Ubuntu 20.04.2 LTS ; Java: Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
• Assignee: Unassigned
• Reporter: Guobao Chen
• Created: 23/Mar/21 06:07
• Updated: 08/Dec/21 16:49
• Resolved: 08/Dec/21 16:49

Description

After installing latest (tinkerpop version 3.4.10), it's found that running a specific gremlin script with 'count()' step gives unexpected result.

Steps to reproduce

1 Install tinkerpop 3.4.10, and connect to this server with gremlin console client

2 create a modern graph with TinkerFactory

gremlin> graph = TinkerFactory.createModern()
 ==>tinkergraph[vertices:6 edges:6]
gremlin> g=graph.traversal()
==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
gremlin> g
==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]

3 run following script:

gremlin> g.V().hasLabel('person').has('name','testuser1').or().has('name','testuser1').values('name','age').dedup().count()

Note that usser 'testuser1' doesn't exist in the created 'modern' graph.

Expected result

a numeric number showing the count (or 0 if there is no vertices from previous steps before count() step)

Actual result
See a list of vertices:

gremlin> g.V().hasLabel('person').has('name','testuser1').or().has('name','testuser1').values('name','age').dedup().count()
 ==>v[1]
 ==>v[2]
 ==>v[3]
 ==>v[4]
 ==>v[5]
 ==>v[6]