From fac90c66c37d8659c644019ffb4a2540b8050ae8 Mon Sep 17 00:00:00 2001
From: goorov <goorov@gmail.com>
Date: Thu, 12 Jan 2017 09:35:19 +0300
Subject: Update AbstractMessage.java

Method Builder#clone() has been changed to bypass Java 1.6 compiler issue.
---
 java/core/src/main/java/com/google/protobuf/AbstractMessage.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/java/core/src/main/java/com/google/protobuf/AbstractMessage.java b/java/core/src/main/java/com/google/protobuf/AbstractMessage.java
index 7639efcf..7935d6fe 100644
--- a/java/core/src/main/java/com/google/protobuf/AbstractMessage.java
+++ b/java/core/src/main/java/com/google/protobuf/AbstractMessage.java
@@ -328,8 +328,11 @@ public abstract class AbstractMessage
       extends AbstractMessageLite.Builder
       implements Message.Builder {
     // The compiler produces an error if this is not declared explicitly.
+    /** Method isn't abstact to bypass Java 1.6 compiler issue. */
     @Override
-    public abstract BuilderType clone();
+    public BuilderType clone() {
+      throw new UnsupportedOperationException("clone() should be implemented in subclasses.");
+    }
 
     /** TODO(jieluo): Clear it when all subclasses have implemented this method. */
     @Override
-- 
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