Compiler crash: does not have an outer accessor

[flomebul]

Hello,
This simple program provokes the crash:

class ABug
  enum Tag
    case first
  import Tag._
  val xx = first

The reported error is

Error while emitting ABug.scala
exception occurred while compiling ABug.scala
java.lang.AssertionError: assertion failed: failure to construct path from package <root> to `this` of class ABug;
package <root> does not have an outer accessor while compiling ABug.scala
Exception in thread "main" java.lang.AssertionError: assertion failed: failure to construct path from package <root> to `this` of class ABug;
package <root> does not have an outer accessor