LuciferYang commented on a change in pull request #30784:
URL: https://github.com/apache/spark/pull/30784#discussion_r544934685
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File path: pom.xml
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@@ -2508,6 +2512,9 @@
<arg>-feature</arg>
<arg>-explaintypes</arg>
<arg>-target:jvm-1.8</arg>
+ <arg>${scalac.warn-to-fatal}</arg>
+ <arg>-Ywarn-unused:imports</arg>
Review comment:
Enable unused-imports check both in Scala 2.12 and Scala 2.13
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