Exception in thread "main" java.lang.NullPointerException
at scalac.typechecker.RefCheck.transform(RefCheck.java:966)
at scalac.ast.Transformer.transform(Transformer.java:273)
at scalac.ast.Transformer.transform(Transformer.java:87)
at scalac.typechecker.RefCheck.transform(RefCheck.java:939)
at scalac.typechecker.RefCheck.transformStat(RefCheck.java:927)
at scalac.typechecker.RefCheck.transformStats(RefCheck.java:884)
at scalac.typechecker.RefCheck.transform(RefCheck.java:965)
at scalac.ast.Transformer.transform(Transformer.java:273)
at scalac.typechecker.RefCheck.transform(RefCheck.java:981)
at scalac.typechecker.RefCheck.transformStat(RefCheck.java:927)
at scalac.typechecker.RefCheck.transformStats(RefCheck.java:884)
at scalac.typechecker.RefCheck.apply(RefCheck.java:54)
at scalac.typechecker.RefCheckPhase.apply(RefCheckPhase.java:26)
at scalac.Global.compile(Global.java:313)
at scalac.Global.compile(Global.java:285)
at scala.tools.scalac.Main$.main(sources/scala/tools/scalac/Main.scala:33)
at scala.tools.scalac.Main.main(sources/scala/tools/scalac/Main.scala)
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