SI-6274 Fix owners when eta-expanding function with byName param

When eta-expanding a function that takes a by-name param the local definition
for the corresponding argument is a function-0

  val eta$1 = () => { argument-to-by-name }

If there are any definitinos in the `argument-to-by-name`, the symbol
owner needs to be changed to the anonymous function's symbol.

To know the function symbol in eta expand, we need to type-check the
function, and therefore pass the `Typer` instance to `etaExpand`.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala
index 1845776c2d..34cb0fa59c 100644
--- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala
@@ -886,7 +886,7 @@ trait Typers extends Modes with Adaptations with Tags {
         if (!meth.isConstructor && !meth.isTermMacro && isFunctionType(pt)) { // (4.2)
           debuglog("eta-expanding " + tree + ":" + tree.tpe + " to " + pt)
           checkParamsConvertible(tree, tree.tpe)
-          val tree0 = etaExpand(context.unit, tree)
+          val tree0 = etaExpand(context.unit, tree, this)
           // println("eta "+tree+" ---> "+tree0+":"+tree0.tpe+" undet: "+context.undetparams+ " mode: "+Integer.toHexString(mode))
 
           if (context.undetparams.nonEmpty) {