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https://issues.apache.org/jira/browse/TINKERPOP-1468?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ted Wilmes closed TINKERPOP-1468.
---------------------------------
Resolution: Won't Fix
Assignee: Ted Wilmes
Since this is related to Groovy and a 0 arg method call (see
[here|https://objectpartners.com/2015/09/02/groovy-gotcha-passing-zero-arguments-to-a-method-that-expects-one/]
for details) we are closing this as "won't fix".
> GraphTraversal.optional throws a NPE if no traversal is provided
> ----------------------------------------------------------------
>
> Key: TINKERPOP-1468
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1468
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.2.2
> Reporter: Ted Wilmes
> Assignee: Ted Wilmes
> Labels: trivial
>
> {{GraphTraversal.optional}} throws a NPE if no traversal is provided. We
> should probably throw a friendlier exception with instructions to provide a
> traversal as an argument.
> {code}
> gremlin> g.V().optional()
> java.lang.NullPointerException
> Type ':help' or ':h' for help.
> Display stack trace? [yN]y
> java.lang.NullPointerException
> at
> org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal.optional(GraphTraversal.java:1316)
> {code}
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