Merge pull request #7012 from dotty-staging/fix-7008

Fix #7008: dealias temporary types in pickling types

Author: liufengyun

compiler/src/dotty/tools/dotc/core/quoted/PickledQuotes.scala

@@ -72,12 +72,13 @@ object PickledQuotes {
   def unpickleType(tasty: PickledQuote, args: PickledTypeArgs)(implicit ctx: Context): Tree = {
     val tastyBytes = TastyString.unpickle(tasty)
     val unpickled = unpickle(tastyBytes, args, isType = true)(ctx.addMode(Mode.ReadPositions))
-    unpickled match {
+    val tpt = unpickled match {
       case Block(aliases, tpt) =>
         // `@quoteTypeTag type` aliasses are not required after unpickling
         tpt
       case tpt => tpt
     }
+    tpt.withType(dealiasTypeTags(tpt.tpe))
   }
 
   // TASTY picklingtests/pos/quoteTest.scala

compiler/test-resources/repl-macros/i6263

@@ -7,9 +7,5 @@ scala> withQuoteContext { fn("foo") }
 ok
 scala> withQuoteContext { fn((1,2)) }
 ok
-scala> object O
-// defined object O
-scala> withQuoteContext { fn(O) }
-ok
 scala> withQuoteContext { fn(1) }
 ok

tests/run-macros/i7008/macro_1.scala

@@ -0,0 +1,19 @@
+import scala.quoted._, scala.quoted.matching._
+import delegate scala.quoted._
+import scala.tasty._
+
+case class Box[T](v: T)
+
+inline def mcr(expr: => Boolean): Unit = ${mcrProxy('expr)}
+
+def mcrProxy(expr: Expr[Boolean]) given QuoteContext: Expr[Unit] = {
+  val res = mcrImpl[Boolean]('{ (esx: Seq[Box[Boolean]]) => () }, expr)
+  // println(s"Out: ${res.show}")
+  res
+}
+
+def mcrImpl[T](func: Expr[Seq[Box[T]] => Unit], expr: Expr[T]) given (ctx: QuoteContext, tt: Type[T]): Expr[Unit] = {
+  import ctx.tasty._
+  val arg = Seq('{(Box($expr))}).toExprOfSeq
+  func(arg)
+}

tests/run-macros/i7008/test_2.scala

@@ -0,0 +1 @@
+@main def Test = println(mcr(true))