From ee9c7f17e953243943181bcbc84590118be6b3c6 Mon Sep 17 00:00:00 2001
From: Feng Xiao <xfxyjwf@gmail.com>
Date: Thu, 6 Apr 2017 16:47:18 -0700
Subject: Cleanup reflection objects for map entry.

---
 src/google/protobuf/compiler/cpp/cpp_file.cc | 9 +++++++++
 src/google/protobuf/struct.pb.cc             | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/google/protobuf/compiler/cpp/cpp_file.cc b/src/google/protobuf/compiler/cpp/cpp_file.cc
index 83e68c12..e0542ae8 100644
--- a/src/google/protobuf/compiler/cpp/cpp_file.cc
+++ b/src/google/protobuf/compiler/cpp/cpp_file.cc
@@ -751,6 +751,15 @@ void FileGenerator::GenerateBuildDescriptors(io::Printer* printer) {
     message_generators_[i]->GenerateShutdownCode(printer);
   }
 
+  if (HasDescriptorMethods(file_, options_)) {
+    for (int i = 0; i < message_generators_.size(); i++) {
+      if (!IsMapEntryMessage(message_generators_[i]->descriptor_)) continue;
+      printer->Print(
+          "delete file_level_metadata[$index$].reflection;\n",
+          "index", SimpleItoa(i));
+    }
+  }
+
   printer->Outdent();
   printer->Print(
     "}\n\n");
diff --git a/src/google/protobuf/struct.pb.cc b/src/google/protobuf/struct.pb.cc
index 825810b1..207e9efe 100644
--- a/src/google/protobuf/struct.pb.cc
+++ b/src/google/protobuf/struct.pb.cc
@@ -133,6 +133,7 @@ void TableStruct::Shutdown() {
   delete file_level_metadata[2].reflection;
   _ListValue_default_instance_.Shutdown();
   delete file_level_metadata[3].reflection;
+  delete file_level_metadata[0].reflection;
 }
 
 void TableStruct::InitDefaultsImpl() {
-- 
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