diff -r 044721d4d359 -r a76c663a9cac src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
--- a/src/share/classes/com/sun/tools/javac/jvm/ClassReader.java	Wed Sep 04 14:44:05 2013 -0700
+++ b/src/share/classes/com/sun/tools/javac/jvm/ClassReader.java	Thu Sep 05 11:27:27 2013 +0200
@@ -72,7 +72,7 @@
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
-public class ClassReader implements Completer {
+public class ClassReader {
     /** The context key for the class reader. */
     protected static final Context.Key<ClassReader> classReaderKey =
         new Context.Key<ClassReader>();
@@ -234,6 +234,17 @@
      */
     Set<Name> warnedAttrs = new HashSet<Name>();
 
+    /**
+     * Completer that delegates to the complete-method of this class.
+     */
+    private final Completer thisCompleter = new Completer() {
+        @Override
+        public void complete(Symbol sym) throws CompletionFailure {
+            ClassReader.this.complete(sym);
+        }
+    };
+
+
     /** Get the ClassReader instance for this invocation. */
     public static ClassReader instance(Context context) {
         ClassReader instance = context.get(classReaderKey);
@@ -264,8 +275,8 @@
         }
 
         packages.put(names.empty, syms.rootPackage);
-        syms.rootPackage.completer = this;
-        syms.unnamedPackage.completer = this;
+        syms.rootPackage.completer = thisCompleter;
+        syms.unnamedPackage.completer = thisCompleter;
     }
 
     /** Construct a new class reader, optionally treated as the
@@ -2319,7 +2330,7 @@
         ClassSymbol c = new ClassSymbol(0, name, owner);
         if (owner.kind == PCK)
             Assert.checkNull(classes.get(c.flatname), c);
-        c.completer = this;
+        c.completer = thisCompleter;
         return c;
     }
 
@@ -2389,7 +2400,7 @@
     /** Completion for classes to be loaded. Before a class is loaded
      *  we make sure its enclosing class (if any) is loaded.
      */
-    public void complete(Symbol sym) throws CompletionFailure {
+    private void complete(Symbol sym) throws CompletionFailure {
         if (sym.kind == TYP) {
             ClassSymbol c = (ClassSymbol)sym;
             c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
@@ -2610,7 +2621,7 @@
             p = new PackageSymbol(
                 Convert.shortName(fullname),
                 enterPackage(Convert.packagePart(fullname)));
-            p.completer = this;
+            p.completer = thisCompleter;
             packages.put(fullname, p);
         }
         return p;