ticket/6666 ~/code/scala2 cat sandbox/test.scala
class C(a: Any)
object O4 extends C({
  object Nested
  Nested
})
O4
ticket/6666 ~/code/scala2 scala210 -nc -Xprint:lambdalift -Ylog:lambdalift sandbox/test.scala 
[log lambdalift] Renaming object Nested to Nested$1
[log lambdalift] Renaming anonymous class $anon to $anon$1
[log lambdalift] Renaming object Nested to Nested$2
[log lambdalift(->constructors)] Couldn't determine how to properly construct variable Nested$module
[[syntax trees at end of                lambdalift]] // test.scala
package <empty> {
  object Main extends Object {
    def <init>(): Main.type = {
      Main.super.<init>();
      ()
    };
    def main(argv: Array[String]): Unit = {
      val args: Array[String] = argv;
      {
        {
          new anonymous class $anon$1();
          ()
        }
      }
    };
    final class $anon$1 extends Object {
      def <init>(): anonymous class $anon$1 = {
        $anon$1.super.<init>();
        ()
      };
      class C extends Object {
        <paramaccessor> private[this] val a: Object = _;
        def <init>($outer: anonymous class $anon$1, a: Object): this.C = {
          C.super.<init>();
          ()
        };
        <synthetic> <paramaccessor> protected val $outer: anonymous class $anon$1 = _;
        <synthetic> <stable> def Main$$anon$C$$$outer(): anonymous class $anon$1 = C.this.$outer
      };
      object O4 extends C {
        def <init>($outer: anonymous class $anon$1): this.O4.type = {
          O4.super.<init>($outer, {
            @volatile var Nested$module: runtime.VolatileObjectRef = new runtime.VolatileObjectRef(<empty>);
            O4.this.Nested$1(Nested$module, $outer)
          });
          ()
        };
        <synthetic> <stable> def Main$$anon$O4$$$outer(): anonymous class $anon$1 = O4.this.$outer;
        object Nested$2 extends Object {
          def <init>($outer: anonymous class $anon$1): O4.Nested$2.type = {
            Nested$2.super.<init>();
            ()
          };
          <synthetic> <paramaccessor> private[this] val $outer: anonymous class $anon$1 = _;
          <synthetic> <stable> def Main$$anon$O4$Nested$$$outer(): anonymous class $anon$1 = Nested$2.this.$outer
        };
        final <stable> private[this] def Nested$1(Nested$module$1: runtime.VolatileObjectRef, $outer$1: anonymous class $anon$1): O4.Nested$2.type = {
          Nested$module$1.elem = new O4.Nested$2.type($outer$1);
          Nested$module$1.elem.$asInstanceOf[O4.Nested$2.type]()
        }
      };
      @volatile <synthetic> private[this] var O4$module: O4.type = _;
      <stable> private def O4(): O4.type = {
        $anon$1.this.O4$module = new O4.type($anon$1.this);
        $anon$1.this.O4$module
      };
      $anon$1.this.O4()
    }
  }
}

java.lang.VerifyError: (class: Main$$anon$1$O4$, method: <init> signature: (LMain$$anon$1;)V) Expecting to find object/array on stack
	at Main$$anon$1.O4$lzycompute(test.scala:2)