LuciferYang commented on a change in pull request #30441:
URL: https://github.com/apache/spark/pull/30441#discussion_r527560437
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File path: project/SparkBuild.scala
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@@ -230,6 +231,8 @@ object SparkBuild extends PomBuild {
// see `scalac -Wconf:help` for details
"-Wconf:cat=deprecation:wv,any:e",
// 2.13-specific warning hits to be muted (as narrowly as possible)
and addressed separately
+ // TODO Enable this option when Scala 2.12 is no longer supported.
Review comment:
@HyukjinKwon A little interesting:
Scala 2.13 think this is a `unused import` but Scala 2.12 compile failed
without this import, so comments `-Wunused:imports` in Scala 2.13 and left a
TODO in this pr
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