From c87a767300ebd0ca71723a73db3aa680f34a9798 Mon Sep 17 00:00:00 2001
From: Martijn Vels <mvels@google.com>
Date: Thu, 13 Jul 2023 15:00:58 -0700
Subject: [PATCH] Make Arena a friend class as it needs to be able to use
 InternalVisibility

PiperOrigin-RevId: 547932793
---
 src/google/protobuf/internal_visibility.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/google/protobuf/internal_visibility.h b/src/google/protobuf/internal_visibility.h
index 32a5a7f4bb..1c89b637aa 100644
--- a/src/google/protobuf/internal_visibility.h
+++ b/src/google/protobuf/internal_visibility.h
@@ -33,6 +33,7 @@
 namespace google {
 namespace protobuf {
 
+class Arena;
 class Message;
 class MessageLite;
 
@@ -48,6 +49,7 @@ class InternalVisibility {
   // ctor outside of the class to force a private ctor instance.
   explicit constexpr InternalVisibility();
 
+  friend class ::google::protobuf::Arena;
   friend class ::google::protobuf::Message;
   friend class ::google::protobuf::MessageLite;