From b091bfb07bcf83972c76130d21bac3ed1b4b707a Mon Sep 17 00:00:00 2001
From: Jisi Liu <jisi.liu@gmail.com>
Date: Thu, 21 Sep 2017 14:08:01 -0700
Subject: [PATCH] Test Shutdown can be called multiple times.

---
 src/google/protobuf/testing/googletest.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/google/protobuf/testing/googletest.cc b/src/google/protobuf/testing/googletest.cc
index 33a75ed68..91f0ef89d 100644
--- a/src/google/protobuf/testing/googletest.cc
+++ b/src/google/protobuf/testing/googletest.cc
@@ -286,6 +286,8 @@ namespace {
 struct ForceShutdown {
   ~ForceShutdown() {
     ShutdownProtobufLibrary();
+    // Test to shutdown the library twice, which should succeed.
+    ShutdownProtobufLibrary();
   }
 } force_shutdown;