Github user newkek commented on the issue:
https://github.com/apache/tinkerpop/pull/390
Seems like it is only on my machine... I think Stephen tried on the docker
image ?
Yes what I have seen so far is it happens at the moment we call
`deserializationContext.findContextualValueDeserializer(typeFromId)` in
`GraphSONTypeDeserializer` where the `typeFromId` is the type that has been
constructed at init time with
`TypeFactory.defaultInstance().constructType(Tree.class)`. I also see that for
some reason I don't get, it happens to me only when the [Enums
types](https://github.com/apache/tinkerpop/blob/TINKERPOP-1278/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONModule.java#L131-L140)
from the Traversal serialzers have been constructed as well. If I comment
those lines, I've got no problem when doing constructType(Tree.class) like all
the rest..
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