case class DebugParam[T](param: T) // TypeStack init: REFERENCE(type AnyRef) // [Now checking: typer] // [check: typer] work/fail1.scala:1: trees differ // old: T [Trees$Ident] (tpe = T) // new: T [Trees$TypeTree] (tpe = T) // [check: typer] work/fail1.scala:1: trees differ // old: DebugParam[T] [Trees$AppliedTypeTree] (tpe = null) // new: DebugParam[T] [Trees$TypeTree] (tpe = DebugParam[T]) // Exception in thread "main" java.lang.NullPointerException // at scala.tools.nsc.typechecker.Typers$Typer.typedTypeConstructor(Typers.scala:4337) // at scala.tools.nsc.typechecker.Typers$Typer.typedTypeConstructor(Typers.scala:4358) // at scala.tools.nsc.typechecker.Typers$Typer.typedNew$1(Typers.scala:3240) // at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3994) // at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4223) // at scala.tools.nsc.typechecker.TreeCheckers$TreeChecker.scala$tools$nsc$typechecker$TreeCheckers$TreeChecker$$super$typed(TreeCheckers.scala:101)