-Ytest-pickler: Fix printing of This

Author: smarter

compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala

@@ -303,7 +303,8 @@ class RefinedPrinter(_ctx: Context) extends PlainPrinter(_ctx) {
         if (qual.isType) toTextLocal(qual) ~ "#" ~ toText(name)
         else toTextLocal(qual) ~ ("." ~ nameIdText(tree) provided name != nme.CONSTRUCTOR)
       case tree: This =>
-        optDotPrefix(tree) ~ "this" ~ idText(tree)
+        if (homogenizedView && tree.hasType) toText(tree.typeOpt) // We only pickle the type of This, not the tree
+        else optDotPrefix(tree) ~ "this" ~ idText(tree)
       case Super(qual: This, mix) =>
         optDotPrefix(qual) ~ "super" ~ optText(mix)("[" ~ _ ~ "]")
       case Apply(fun, args) =>