check initialization in community build

Author: liufengyun

community-build/src/scala/dotty/communitybuild/projects.scala

@@ -102,6 +102,7 @@ final case class SbtCommunityProject(
   private val baseCommand =
     "clean; set logLevel in Global := Level.Error; set updateOptions in Global ~= (_.withLatestSnapshots(false)); "
     ++ s"""set dependencyOverrides in ThisBuild ++= ${dependencyOverrides.mkString("Seq(", ", ", ")")}; """
+    ++ """set scalacOptions in Global += "-Ycheck-init";"""
     ++ s"++$compilerVersion!; "
 
   override val testCommand = s"$baseCommand$sbtTestCommand"