Fix #1401: Make sure all refs are forwarded

Faced with recursive dependencies through self types, we might have
to apply `normalizeToClassRefs` to a class P with a parent that is not
yet initialized (witnessed by P's parents being Nil). In that case
we should still execute forwardRefs on P, but we have to
wait in a suspension until P is initialized.

This avoids the problem raised in #1401. I am still not quite sure
why forwardRefs is needed, but it seems that asSeenFrom alone is not
enough to track the dependencies in this case.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/dotc/scala-collections.whitelist b/test/dotc/scala-collections.whitelist
index 50a3f3479..29db48cf2 100644
--- a/test/dotc/scala-collections.whitelist
+++ b/test/dotc/scala-collections.whitelist
@@ -83,7 +83,7 @@
 ./scala-scala/src/library/scala/collection/immutable/Seq.scala
 ./scala-scala/src/library/scala/collection/mutable/IndexedSeq.scala
 ./scala-scala/src/library/scala/collection/mutable/ListBuffer.scala
-#./scala-scala/src/library/scala/collection/mutable/BufferLike.scala // works under junit, fails under partest, but can't see more info on the cause
+./scala-scala/src/library/scala/collection/mutable/BufferLike.scala
 
 ./scala-scala/src/library/scala/collection/mutable/ArrayBuilder.scala