Avoid omitting constant typed vals in constructors

Fix for regression in 2.12.0-RC1 compiling shapeless tests.

They were given the same treatment as vals that are
members of classes on the definition side without the
requisite transformation of references to the val to
fold the constant into references.

This commit limits the transform to members of classes.

Co-Authored-By: Miles Sabin <miles@milessabin.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/test/files/pos/shapeless-regression.scala b/test/files/pos/shapeless-regression.scala
new file mode 100644
index 0000000000..f3a1ed1ba0
--- /dev/null
+++ b/test/files/pos/shapeless-regression.scala
@@ -0,0 +1,16 @@
+class W[T <: AnyRef](val t: T) {
+  val v: T {} = t
+}
+
+object W {
+  def apply[T <: AnyRef](t: T) = new W[t.type](t)
+}
+
+object RightAssoc {
+  def ra_:[T](t: T): Unit = ()
+}
+
+object Boom {
+  W("fooo").v ra_: RightAssoc
+}
+