src/java.base/share/classes/sun/reflect/annotation/AnnotationInvocationHandler.java

*** 159,168 ****
--- 159,171 ----
  
      /**
       * Translates a member value (in "dynamic proxy return form") into a string
       */
      private static String memberValueToString(Object value) {
+         if (value instanceof ExceptionProxy) {
+             return ((ExceptionProxy)value).memberToString();
+         }
          Class<?> type = value.getClass();
          if (!type.isArray())    // primitive, string, class, enum const,
                                  // or annotation
              return value.toString();