Github user okram commented on the issue: https://github.com/apache/tinkerpop/pull/486 This is a good find. However, the implementation is a bit gimpy. `Step.getRequirements()` is already a recursive process as `TraversalParents` will check their children for requirements. I propose we go back to the `INVALIDATING_STEPS` model and just list all the steps that explicitly require `PATH`. That is, add the ones we were missing and keep the new test case you added to `IncidentToAdjacentStrategyTest`. * `PathStep` * `TreeStep` * `CyclicPathStep` * `SimplePathStep` * `EdgeOtherVertexStep` * `TreeSideEffectStep` ...then also add `LambdaHolder`.
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