scala/scala — pull request #732 by retronym (2012-06-17 11:52:40+00:00)
Title: SI-4989 Reject super.x if an intermediate class declares x abstract.

This is in line with Java's treatment. Without this, an AbstractMethodError
is thrown at runtime.

Review by @hubertp

Discussion: https://groups.google.com/d/topic/scala-internals/1D9HEe-CIe0/discussion