Add assertion to debug community build stdlib 2.13

Author: liufengyun

compiler/src/dotty/tools/dotc/transform/ExpandSAMs.scala

@@ -46,6 +46,7 @@ class ExpandSAMs extends MiniPhase {
           tree
         case tpe =>
           val tpe1 = checkRefinements(tpe, fn)
+          assert(!tpe1.isRef(defn.AnyClass), "Tree: " + tree.show + " @ " + tree.sourcePos)
           val Seq(samDenot) = tpe1.abstractTermMembers.filter(!_.symbol.isSuperAccessor)
           cpy.Block(tree)(stats,
               AnonClass(tpe1 :: Nil, fn.symbol.asTerm :: Nil, samDenot.symbol.asTerm.name :: Nil))

compiler/src/dotty/tools/dotc/typer/Typer.scala

@@ -515,7 +515,7 @@ class Typer extends Namer
       case templ: untpd.Template =>
         import untpd._
         var templ1 = templ
-        def isEligible(tp: Type) = tp.exists && !tp.typeSymbol.is(Final) && tp.classSymbol != defn.AnyClass
+        def isEligible(tp: Type) = tp.exists && !tp.typeSymbol.is(Final) && !tp.isRef(defn.AnyClass)
         if (templ1.parents.isEmpty &&
             isFullyDefined(pt, ForceDegree.noBottom) &&
             isEligible(pt.underlyingClassRef(refinementOK = false)))