--- a/langtools/src/share/classes/com/sun/tools/javac/comp/DeferredAttr.java	Wed Apr 30 23:02:14 2014 -0700
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/DeferredAttr.java	Thu May 01 20:36:11 2014 +0100
@@ -109,6 +109,11 @@
                 void complete() {
                     Assert.error("Empty deferred context!");
                 }
+
+                @Override
+                public String toString() {
+                    return "Empty deferred context!";
+                }
             };
     }