B.scala:2: error: illegal inheritance from sealed trait T: t0699/B.scala != t0699/A.scala
  trait T1 extends A.T
                     ^
B.scala:3: error: illegal inheritance from sealed class C: t0699/B.scala != t0699/A.scala
  trait T2 extends A.C
                     ^
B.scala:4: error: illegal inheritance from sealed class C: t0699/B.scala != t0699/A.scala
  class C1 extends A.C
                     ^
three errors found