Optimize isStable by using normalize, which is cached

dyuval · May 4, 2018 · 9e53387 · 9e53387
1 parent c8fd337
commit 9e53387
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/reflect/scala/reflect/internal/Definitions.scala b/src/reflect/scala/reflect/internal/Definitions.scala
@@ -763,7 +763,7 @@ trait Definitions extends api.StandardDefinitions {
       case TypeRef(_, NothingClass | SingletonClass, _) => true
       case TypeRef(_, sym, _) if sym.isAbstractType     => tp.bounds.hi.typeSymbol isSubClass SingletonClass
       case TypeRef(pre, sym, _) if sym.isModuleClass    => isStable(pre)
-      case TypeRef(_, _, _)                             => val dealiased = tp.dealias; (dealiased ne tp) && isStable(dealiased)
+      case TypeRef(_, _, _)                             => val normalize = tp.normalize; (normalize ne tp) && isStable(normalize)
       case TypeVar(origin, _)                           => isStable(origin)
       case AnnotatedType(_, atp)                        => isStable(atp)    // Really?
       case _: SimpleTypeProxy                           => isStable(tp.underlying)