Fix #744

Mixi was not calling transformFollowing on generated setters.

Author: DarkDimius

src/dotty/tools/dotc/transform/Mixin.scala

@@ -230,7 +230,7 @@ class Mixin extends MiniPhaseTransform with SymTransformer { thisTransform =>
 
     def setters(mixin: ClassSymbol): List[Tree] =
       for (setter <- mixin.info.decls.filter(setr => setr.isSetter && !wasDeferred(setr)).toList)
-        yield DefDef(implementation(setter.asTerm), unitLiteral.withPos(cls.pos))
+        yield transformFollowing(DefDef(implementation(setter.asTerm), unitLiteral.withPos(cls.pos)))
 
     cpy.Template(impl)(
       constr =

tests/run/i744.check

@@ -0,0 +1,2 @@
+1
+

tests/run/i744.scala

@@ -0,0 +1,8 @@
+trait A{
+  private var s = 1
+  def getS = s
+}
+
+object Test extends A {
+ def main(args: Array[String]): Unit = println(getS)
+}