Github user felixcheung commented on the pull request:
https://github.com/apache/spark/pull/9099#issuecomment-148272667
it does look like except for a 2-3 lines the `createDataFrame` function has
not changed since 1.4.0
https://github.com/apache/spark/blob/branch-1.4/R/pkg/R/SQLContext.R#L86
so it's possible that this bug exists since then. though most people are
passing `data.frame` to this so it might not have been exercised as much
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