[jira] [Created] (TINKERPOP-2384) Inject and withSideEffect causing different outcomes in order step

["Kelvin R. Lawrence (Jira)" <ji...@apache.org>]

Kelvin R. Lawrence created TINKERPOP-2384:
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             Summary: Inject and withSideEffect causing different outcomes in order step
                 Key: TINKERPOP-2384
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2384
             Project: TinkerPop
          Issue Type: Bug
          Components: process
    Affects Versions: 3.4.6
         Environment: TinkerGraph @ 3.4.6 , TinkerFactory.createModern() , Gremlin Console
            Reporter: Kelvin R. Lawrence


I tried creating the following query two different ways. One using _*inject*_ and the other using _*withSideEffect*_. The version using _*inject*_ works as expected and the version using _*withSideEffect*_ causes an exception. As I understand it, in this case the two should be equivalent. When used outside of an *_order().by()_* the _*select*_ steps work fine in my testing

 
gremlin> g.inject('name').as('key').V().order().by(valueMap().select(select('key')).unfold()).values('name')

==>josh
==>lop
==>marko
==>peter
==>ripple
==>vadas

gremlin> g.withSideEffect('key','name').V().order().by(valueMap().select(select('key')).unfold()).values('name')
The provided traverser does not map to a value: v[1]->[PropertyMapStep(value), TraversalSelectStep([SelectOneStep(last,ke
y)]), UnfoldStep]
Type ':help' or ':h' for help.    

gremlin> g.withSideEffect('key','name').V().valueMap().select(select('key')).unfold()
==>marko
==>vadas
==>lop
==>josh
==>ripple
==>peter



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