Superaccessors are methods

Need to have Method flag set

Author: odersky

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

@@ -90,7 +90,7 @@ class SuperAccessors extends MacroTransform with IdentityDenotTransformer { this
       val superAcc = clazz.info.decl(supername).suchThat(_.signature == sym.signature).symbol orElse {
         ctx.debuglog(s"add super acc ${sym.showLocated} to $clazz")
         val acc = ctx.newSymbol(
-            clazz, supername, SuperAccessor | Private | Artifact,
+            clazz, supername, SuperAccessor | Private | Artifact | Method,
             ensureMethodic(sel.tpe.widenSingleton), coord = sym.coord).enteredAfter(thisTransformer)
         // Diagnostic for SI-7091
         if (!accDefs.contains(clazz))