Github user spmallette commented on the pull request:
https://github.com/apache/incubator-tinkerpop/pull/244#issuecomment-192387684
not sure if this is just a temporary error or not but we're seeing this
error over and over from appveyor:
https://ci.appveyor.com/project/ApacheSoftwareFoundation/incubator-tinkerpop/build/291
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