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https://issues.apache.org/jira/browse/TINKERPOP-1867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318400#comment-16318400
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stephen mallette commented on TINKERPOP-1867:
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I don't get the full picture from TINKERPOP-1629. The issue is still open and I
don't see any code tied to it - does that mean nothing changed (or did he CTR
some changes in)? Also, do you understand what part of the reducing barrier
causes the extra traverser to show up in the output (i'm still trying to
understand that more fully)?
> union() can produce extra traversers
> -------------------------------------
>
> Key: TINKERPOP-1867
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1867
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.2.7
> Reporter: stephen mallette
> Assignee: stephen mallette
>
> Hard to say where this bug is coming from but basically the most simple
> representation is:
> {code}
> gremlin> g.V(1,2).local(__.union(__.constant(1).count()))
> ==>1
> ==>0
> ==>1
> {code}
> Similar problems occur with {{sum()}} and other reducing barriers when used
> in this context.
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