Github user dbtsai commented on the issue: https://github.com/apache/spark/pull/22246 `SparkILoopInterpreter.scala` and `SparkExprTyper.scala` are only on 2.11 branch. It can not be compiled in 2.12. I think it's okay to have them in 2.11 branch since they are not needed in 2.12. We can remove those two files when the support of 2.11 is ended. ``` [error] /Users/d_tsai/dev/clean/apache-spark/repl/src/main/scala/org/apache/spark/repl/SparkILoopInterpreter.scala:80: overriding lazy value importableSymbolsWithRenames in class ImportHandler of type List[(this.intp.global.Symbol, this.intp.global.Name)]; [error] lazy value importableSymbolsWithRenames needs `override' modifier [error] lazy val importableSymbolsWithRenames: List[(Symbol, Name)] = { [error] ^ [warn] two warnings found [error] one error found [error] Compile failed at Aug 27, 2018 11:51:19 AM [0.613s] ```
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