accommodates Martin's comments

Author: xeno-by

src/reflect/scala/reflect/api/Mirrors.scala

@@ -242,6 +242,8 @@ trait Mirrors { self: Universe =>
      *  Such a mirror can be used to further reflect against the members of the object
      *  to get/set fields, invoke methods and inspect inner classes and objects.
      */
+    // we need a ClassTag here to preserve boxity of primitives
+    // the class tag lets us tell apart `mirror.reflect(2)` and `mirror.reflect(new Integer(2))`
     def reflect[T: ClassTag](obj: T): InstanceMirror
 
     /** Reflects against a static class symbol and returns a mirror

src/reflect/scala/reflect/runtime/JavaMirrors.scala

@@ -161,11 +161,7 @@ trait JavaMirrors extends internal.SymbolTable with api.JavaUniverse { self: Sym
       } else if (wannabe.owner == AnyValClass) {
         if (!owner.isPrimitiveValueClass && !owner.isDerivedValueClass) ErrorNotMember(wannabe, owner)
       } else {
-        def isMemberOf(wannabe: Symbol, owner: ClassSymbol): Boolean = {
-          val isNonShadowedMember = owner.info.member(wannabe.name).alternatives.contains(wannabe)
-          isNonShadowedMember || owner.info.baseClasses.tail.exists(base => isMemberOf(wannabe, base.asClass))
-        }
-        if (!isMemberOf(wannabe, owner)) ErrorNotMember(wannabe, owner)
+        if (!(owner.info.baseClasses contains wannabe.owner)) ErrorNotMember(wannabe, owner)
       }
     }