Github user witgo commented on the pull request:
https://github.com/apache/spark/pull/1330#issuecomment-49117596
As a result of #772. The master has fixed this problem. But we should
remove this line `<arg>-language:postfixOps</arg>` in
[pom.xml#L807](https://github.com/apache/spark/blob/master/pom.xml#L807). Once
we remove this line.The problem will be back.
May have a look the discussion in #1069
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