Github user dkuppitz commented on the issue: https://github.com/apache/tinkerpop/pull/355 I noticed a flaw while reading through the code. It was not introduced by this PR, but it's probably a good time to get it from the table. ``` gremlin> g = TinkerFactory.createModern().traversal() ==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard] gremlin> g.V().hasId(within(new ArrayList())) 0 Display stack trace? [yN] N gremlin> g.V().hasId(without(new ArrayList())) 0 Display stack trace? [yN] ``` A `HasContainer` with an empty collection will always throw an exception because of [line 58 in HasContainer.java](https://github.com/BrynCooke/incubator-tinkerpop/blob/ca8a4f9fb8a9bc1d69aa10870d75076b8fa906b5/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/util/HasContainer.java#L58), where we simply assume that a collection will always contain at least one element.
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