GitHub user ueshin opened a pull request:

    https://github.com/apache/spark/pull/20994

    [SPARK-21898][ML][FOLLOWUP] Fix Scala 2.12 build.

    ## What changes were proposed in this pull request?
    
    This is a follow-up pr of #19108 which broke Scala 2.12 build.
    
    ```
    [error] 
/Users/ueshin/workspace/apache-spark/spark/mllib/src/main/scala/org/apache/spark/ml/stat/KolmogorovSmirnovTest.scala:86:
 overloaded method value test with alternatives:
    [error]   (dataset: org.apache.spark.sql.DataFrame,sampleCol: String,cdf: 
org.apache.spark.api.java.function.Function[java.lang.Double,java.lang.Double])org.apache.spark.sql.DataFrame
 <and>
    [error]   (dataset: org.apache.spark.sql.DataFrame,sampleCol: String,cdf: 
scala.Double => scala.Double)org.apache.spark.sql.DataFrame
    [error]  cannot be applied to (org.apache.spark.sql.DataFrame, String, 
scala.Double => java.lang.Double)
    [error]     test(dataset, sampleCol, (x: Double) => cdf.call(x))
    [error]     ^
    [error] one error found
    ```
    
    ## How was this patch tested?
    
    Existing tests.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/ueshin/apache-spark 
issues/SPARK-21898/fix_scala-2.12

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/20994.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #20994
    
----
commit 6957f38010e5edbec26128bd9c28a6120600bd77
Author: Takuya UESHIN <ueshin@...>
Date:   2018-04-06T07:28:32Z

    Fix Scala 2.12 build.

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