From 27bc034eaf9b310214d75e3d9cd2fff4d99d544c Mon Sep 17 00:00:00 2001
From: Allan Renucci <allan.renucci@gmail.com>
Date: Fri, 29 Jun 2018 17:58:31 +0200
Subject: [PATCH 1/2] Resolve SeqType based in alias defined in scala package
 object

  - in 2.12: scala.collection.Seq
  - in 2.13: scala.collection.immutable.Seq

Revert when we drop support for 2.12?
---
 compiler/src/dotty/tools/dotc/core/Definitions.scala | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/compiler/src/dotty/tools/dotc/core/Definitions.scala b/compiler/src/dotty/tools/dotc/core/Definitions.scala
index 77cca3dffe85..21c5a1a6773e 100644
--- a/compiler/src/dotty/tools/dotc/core/Definitions.scala
+++ b/compiler/src/dotty/tools/dotc/core/Definitions.scala
@@ -400,7 +400,15 @@ class Definitions {
       List(AnyClass.typeRef), EmptyScope)
   lazy val SingletonType: TypeRef = SingletonClass.typeRef
 
-  lazy val SeqType: TypeRef = ctx.requiredClassRef("scala.collection.Seq")
+  lazy val SeqType: TypeRef = {
+    // We load SeqType from the alias in scala package object
+    //  - in 2.12: scala.collection.Seq
+    //  - in 2.13: scala.collection.immutable.Seq
+    val alias = ctx.base.staticRef("scala.Seq".toTypeName).requiredSymbol(_.isAliasType)
+    alias.info.classSymbol.typeRef
+  }
+
+  // lazy val SeqType: TypeRef = ctx.requiredClassRef("scala.collection.Seq")
   def SeqClass(implicit ctx: Context) = SeqType.symbol.asClass
     lazy val Seq_applyR = SeqClass.requiredMethodRef(nme.apply)
     def Seq_apply(implicit ctx: Context) = Seq_applyR.symbol

From 01427b9a0def5281ba9773abe0ae70753e0df853 Mon Sep 17 00:00:00 2001
From: Allan Renucci <allan.renucci@gmail.com>
Date: Fri, 29 Jun 2018 17:59:55 +0200
Subject: [PATCH 2/2] More tests for repeated

---
 tests/pos/repeatedArgs.scala | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tests/pos/repeatedArgs.scala b/tests/pos/repeatedArgs.scala
index f9abb4aee70e..d11f270824fd 100644
--- a/tests/pos/repeatedArgs.scala
+++ b/tests/pos/repeatedArgs.scala
@@ -1,3 +1,15 @@
 object testRepeated {
- def foo = java.lang.System.out.format("%4$2s %3$2s %2$2s %1$2s", "a", "b", "c", "d")
+  def foo = java.lang.System.out.format("%4$2s %3$2s %2$2s %1$2s", "a", "b", "c", "d")
+
+  def bar(xs: Int*): Int = xs.length
+  def bat(xs: scala.Seq[Int]): Int = xs.length
+
+  def test(xs: List[Int]): Unit = {
+    bar(1, 2, 3)
+    bar(xs: _*)
+
+    val List(_, ys: _*) = xs
+    bar(ys: _*)
+    bat(ys)
+  }
 }