Merge tag 'refs/tags/sync-piper' into sync-stage

Makefile.am

@@ -92,6 +92,7 @@ csharp_EXTRA_DIST=                                                           \
   csharp/src/AddressBook/ListPeople.cs                                       \
   csharp/src/AddressBook/Program.cs                                          \
   csharp/src/AddressBook/SampleUsage.cs                                      \
+  csharp/src/Directory.Build.props                                           \
   csharp/src/Google.Protobuf.Benchmarks/BenchmarkDatasetConfig.cs            \
   csharp/src/Google.Protobuf.Benchmarks/BenchmarkMessage1Proto3.cs           \
   csharp/src/Google.Protobuf.Benchmarks/Benchmarks.cs                        \

Protobuf-C++.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = 'Protobuf-C++'
-  s.version  = '3.21.1'
+  s.version  = '3.21.2'
   s.summary  = 'Protocol Buffers v3 runtime library for C++.'
   s.homepage = 'https://github.com/google/protobuf'
   s.license  = 'BSD-3-Clause'

cmake/install.cmake

@@ -102,47 +102,55 @@ foreach(_file ${nobase_dist_proto_DATA})
 endforeach()
 
 # Install configuration
-set(_cmakedir_desc "Directory relative to CMAKE_INSTALL to install the cmake configuration files")
+set(_install_cmakedir_desc "Directory relative to CMAKE_INSTALL to install the cmake configuration files")
+set(_build_cmakedir_desc "Directory relative to CMAKE_CURRENT_BINARY_DIR for cmake configuration files")
 set(_exampledir_desc "Directory relative to CMAKE_INSTALL_DATA to install examples")
+set(_protobuf_subdir_desc "Subdirectory in which to install cmake configuration files")
 if(NOT MSVC)
-  set(CMAKE_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/protobuf" CACHE STRING "${_cmakedir_desc}")
+  set(protobuf_CMAKE_SUBDIR "cmake/protobuf" CACHE STRING "${_protobuf_subdir_desc}")
+  set(CMAKE_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/${protobuf_CMAKE_SUBDIR}" CACHE STRING "${_install_cmakedir_desc}")
   set(CMAKE_INSTALL_EXAMPLEDIR "${CMAKE_INSTALL_DATADIR}/protobuf/examples" CACHE STRING "${_exampledir_desc}")
 else()
+  set(protobuf_CMAKE_SUBDIR "cmake" CACHE STRING "${_protobuf_subdir_desc}")
   set(CMAKE_INSTALL_CMAKEDIR "cmake" CACHE STRING "${_cmakedir_desc}")
   set(CMAKE_INSTALL_EXAMPLEDIR "examples" CACHE STRING "${_exampledir_desc}")
 endif()
+set(CMAKE_BUILD_CMAKEDIR "${CMAKE_CURRENT_BINARY_DIR}/${protobuf_CMAKE_SUBDIR}" CACHE STRING "${_build_cmakedir_desc}")
+mark_as_advanced(protobuf_CMAKE_SUBDIR)
+mark_as_advanced(CMAKE_BUILD_CMAKEDIR)
 mark_as_advanced(CMAKE_INSTALL_CMAKEDIR)
 mark_as_advanced(CMAKE_INSTALL_EXAMPLEDIR)
 
 configure_file(${protobuf_SOURCE_DIR}/cmake/protobuf-config.cmake.in
-  ${CMAKE_INSTALL_CMAKEDIR}/protobuf-config.cmake @ONLY)
+  ${CMAKE_BUILD_CMAKEDIR}/protobuf-config.cmake @ONLY)
 configure_file(${protobuf_SOURCE_DIR}/cmake/protobuf-config-version.cmake.in
-  ${CMAKE_INSTALL_CMAKEDIR}/protobuf-config-version.cmake @ONLY)
+  ${CMAKE_BUILD_CMAKEDIR}/protobuf-config-version.cmake @ONLY)
 configure_file(${protobuf_SOURCE_DIR}/cmake/protobuf-module.cmake.in
-  ${CMAKE_INSTALL_CMAKEDIR}/protobuf-module.cmake @ONLY)
+  ${CMAKE_BUILD_CMAKEDIR}/protobuf-module.cmake @ONLY)
 configure_file(${protobuf_SOURCE_DIR}/cmake/protobuf-options.cmake
-  ${CMAKE_INSTALL_CMAKEDIR}/protobuf-options.cmake @ONLY)
+  ${CMAKE_BUILD_CMAKEDIR}/protobuf-options.cmake @ONLY)
 
 # Allows the build directory to be used as a find directory.
 
 if (protobuf_BUILD_PROTOC_BINARIES)
   export(TARGETS libprotobuf-lite libprotobuf libprotoc protoc
     NAMESPACE protobuf::
-    FILE ${CMAKE_INSTALL_CMAKEDIR}/protobuf-targets.cmake
+    FILE ${CMAKE_BUILD_CMAKEDIR}/protobuf-targets.cmake
   )
 else (protobuf_BUILD_PROTOC_BINARIES)
   export(TARGETS libprotobuf-lite libprotobuf
     NAMESPACE protobuf::
-    FILE ${CMAKE_INSTALL_CMAKEDIR}/protobuf-targets.cmake
+    FILE ${CMAKE_BUILD_CMAKEDIR}/protobuf-targets.cmake
   )
 endif (protobuf_BUILD_PROTOC_BINARIES)
 
 install(EXPORT protobuf-targets
   DESTINATION "${CMAKE_INSTALL_CMAKEDIR}"
   NAMESPACE protobuf::
-  COMPONENT protobuf-export)
+  COMPONENT protobuf-export
+)
 
-install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_CMAKEDIR}/
+install(DIRECTORY ${CMAKE_BUILD_CMAKEDIR}/
   DESTINATION "${CMAKE_INSTALL_CMAKEDIR}"
   COMPONENT protobuf-export
   PATTERN protobuf-targets.cmake EXCLUDE

configure.ac

@@ -17,7 +17,7 @@ AC_PREREQ(2.59)
 # In the SVN trunk, the version should always be the next anticipated release
 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
 # the size of one file name in the dist tarfile over the 99-char limit.)
-AC_INIT([Protocol Buffers],[3.21.1],[protobuf@googlegroups.com],[protobuf])
+AC_INIT([Protocol Buffers],[3.21.2],[protobuf@googlegroups.com],[protobuf])
 
 AM_MAINTAINER_MODE([enable])
 

csharp/src/Google.Protobuf/Google.Protobuf.csproj

@@ -5,8 +5,7 @@
     <Copyright>Copyright 2015, Google Inc.</Copyright>
     <AssemblyTitle>Google Protocol Buffers</AssemblyTitle>
     <VersionPrefix>3.21.2</VersionPrefix>
-    <!-- C# 7.2 is required for Span/BufferWriter/ReadOnlySequence -->
+    <LangVersion>10.0</LangVersion>
-    <LangVersion>7.2</LangVersion>
     <Authors>Google Inc.</Authors>
     <TargetFrameworks>netstandard1.1;netstandard2.0;net45;net50</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>

docs/jvm_aot.md

@@ -1,8 +1,8 @@
-# Ahead Of Time (AOT) compilation for the Java Virtual Machine (JVM)"
+# Ahead Of Time (AOT) compilation for the Java Virtual Machine (JVM)
 
 Ahead Of Time (AOT) compilation build tools such as those provided by [GraalVM's `native-image`](https://www.graalvm.org/reference-manual/native-image/) can require some configuration when using protobuf.
-Protobuf for the JVM uses reflection and some of its target classes are not possible to determine in advance.
+Protobuf for the JVM uses reflection, and some of its target classes are not possible to determine in advance.
-Historically, there were good reasons to use reflection based on APIs that were published effectively requiring them, and this situation is unlikely to change.
+This situation is unlikely to change.
 
 [The Lite version of protobuf for the JVM](https://github.com/protocolbuffers/protobuf/blob/main/java/lite.md)
 avoids reflection and may be better suited for use with AOT compilation tooling. This Lite version was originally targeted for use on Android which has similar AOT compilation
@@ -10,9 +10,11 @@ goals as GraalVM's native-image tool.
 
 ## GraalVM native-image
 
-This section addresses GraalVM's `native-image` configuration specifically as this AOT compilation tool due to its popularity. The `native-image` tool can be configured
+The GraalVM `native-image` tool can be configured with options for the  
-with respect to: the [Java Native Interface](https://en.wikipedia.org/wiki/Java_Native_Interface) (JNI), http proxying, reflection, and other resources. While these
+[Java Native Interface](https://www.graalvm.org/22.0/reference-manual/native-image/JNI/) (JNI), 
-considerations can be manually declared as JSON files, we recommend that a JVM application is exercised along with 
+http proxying, reflection, and other resources. While these
+configuration options can be manually specified in JSON files, we recommend 
+that you exercise the application with 
 [the assisted configuration agent](https://www.graalvm.org/reference-manual/native-image/BuildConfiguration/#assisted-configuration-of-native-image-builds). The agent
-will generate files that you can then subsequently point at when invoking `native-image`. We recommend that the generated files are retained with a project's source
+will generate native-image.properties files that you add to the project's
-code.
+META-INF/native-image/ directory. The  Native Image builder uses configuration options provided in META-INF/native-image/ to construct native-image command line arguments.

java/core/src/main/java/com/google/protobuf/UnsafeByteOperations.java

@@ -43,7 +43,7 @@ import java.nio.ByteBuffer;
  * ByteString} can lead to unexpected and undesirable consequences in your application, and will
  * likely be difficult to debug. Proceed with caution!
  *
- * <p>This can have a number of significant side affects that have spooky-action-at-a-distance-like
+ * <p>This can have a number of significant side effects that have spooky-action-at-a-distance-like
  * behavior. In particular, if the bytes value changes out from under a Protocol Buffer:
  *
  * <ul>

java/util/src/main/java/com/google/protobuf/util/FieldMaskUtil.java

@@ -101,9 +101,8 @@ public final class FieldMaskUtil {
   /**
    * Constructs a FieldMask for a list of field paths in a certain type.
    *
-   * @throws IllegalArgumentException if any of the field path is not valid.
+   * @throws IllegalArgumentException if any of the field path is not valid
    */
-  // TODO(xiaofeng): Consider renaming fromStrings()
   public static FieldMask fromStringList(Class<? extends Message> type, Iterable<String> paths) {
     return fromStringList(Internal.getDefaultInstance(type).getDescriptorForType(), paths);
   }

python/google/protobuf/__init__.py

@@ -30,4 +30,4 @@
 
 # Copyright 2007 Google Inc. All Rights Reserved.
 
-__version__ = '4.21.1'
+__version__ = '4.21.2'

python/google/protobuf/descriptor.py

@@ -873,11 +873,14 @@ class ServiceDescriptor(_NestedDescriptorBase):
 
     Args:
       name (str): Name of the method.
+
     Returns:
-      MethodDescriptor or None: the descriptor for the requested method, if
+      MethodDescriptor: The descriptor for the requested method.
-      found.
+
+    Raises:
+      KeyError: if the method cannot be found in the service.
     """
-    return self.methods_by_name.get(name, None)
+    return self.methods_by_name[name]
 
   def CopyToProto(self, proto):
     """Copies this to a descriptor_pb2.ServiceDescriptorProto.

python/google/protobuf/internal/descriptor_test.py

@@ -118,6 +118,14 @@ class DescriptorTest(unittest.TestCase):
   def GetDescriptorPool(self):
     return symbol_database.Default().pool
 
+  def testFindMethodByName(self):
+    service_descriptor = (unittest_custom_options_pb2.
+                          TestServiceWithCustomOptions.DESCRIPTOR)
+    method_descriptor = service_descriptor.FindMethodByName('Foo')
+    self.assertEqual(method_descriptor.name, 'Foo')
+    with self.assertRaises(KeyError):
+      service_descriptor.FindMethodByName('MethodDoesNotExist')
+
   def testEnumValueName(self):
     self.assertEqual(self.my_message.EnumValueName('ForeignEnum', 4),
                      'FOREIGN_FOO')

src/Makefile.am

@@ -18,7 +18,7 @@ else
 PTHREAD_DEF =
 endif
 
-PROTOBUF_VERSION = 32:1:0
+PROTOBUF_VERSION = 32:2:0
 
 if GCC
 # Turn on all warnings except for sign comparison (we ignore sign comparison

src/google/protobuf/any.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/api.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/arena.cc

@@ -153,7 +153,8 @@ void* SerialArena::AllocateAlignedWithCleanupFallback(
 PROTOBUF_NOINLINE
 void SerialArena::AddCleanupFallback(void* elem, void (*destructor)(void*),
                                      const AllocationPolicy* policy) {
-  AllocateNewBlock(0, policy);
+  size_t required = cleanup::Size(destructor);
+  AllocateNewBlock(required, policy);
   AddCleanupFromExisting(elem, destructor);
 }
 

src/google/protobuf/arena_impl.h

@@ -136,6 +136,7 @@ inline PROTOBUF_ALWAYS_INLINE void CreateNode(Tag tag, void* pos,
 }
 
 inline PROTOBUF_ALWAYS_INLINE void PrefetchNode(const void* elem_address) {
+  (void)elem_address;
 }
 
 inline PROTOBUF_ALWAYS_INLINE void DestroyNode(Tag tag, const void* pos) {

src/google/protobuf/compiler/cpp/field.cc

@@ -330,6 +330,7 @@ void FieldGenerator::GenerateCopyConstructorCode(io::Printer* printer) const {
   }
 }
 
+
 void SetCommonOneofFieldVariables(
     const FieldDescriptor* descriptor,
     std::map<std::string, std::string>* variables) {

src/google/protobuf/compiler/cpp/field.h

@@ -208,6 +208,7 @@ class FieldGenerator {
 
   virtual bool IsInlined() const { return false; }
 
+
   virtual ArenaDtorNeeds NeedsArenaDestructor() const {
     return ArenaDtorNeeds::kNone;
   }

src/google/protobuf/compiler/cpp/helpers.cc

@@ -76,7 +76,8 @@ std::string DotsToColons(const std::string& name) {
   return StringReplace(name, ".", "::", true);
 }
 
-static const char* const kKeywordList[] = {  //
+static const char* const kKeywordList[] = {
+    //
     "NULL",
     "alignas",
     "alignof",
@@ -159,7 +160,21 @@ static const char* const kKeywordList[] = {  //
     "wchar_t",
     "while",
     "xor",
-    "xor_eq"};
+    "xor_eq",
+#ifdef PROTOBUF_FUTURE_CPP20_KEYWORDS  // C++20 keywords.
+    "char8_t",
+    "char16_t",
+    "char32_t",
+    "concept",
+    "consteval",
+    "constinit",
+    "co_await",
+    "co_return",
+    "co_yield",
+    "requires",
+#endif  // !PROTOBUF_FUTURE_BREAKING_CHANGES
+};
+
 
 static std::unordered_set<std::string>* MakeKeywordsMap() {
   auto* result = new std::unordered_set<std::string>();
@@ -509,6 +524,7 @@ std::string FieldName(const FieldDescriptor* field) {
   return result;
 }
 
+
 std::string FieldMemberName(const FieldDescriptor* field, bool split) {
   StringPiece prefix =
       IsMapEntryMessage(field->containing_type()) ? "" : "_impl_.";
@@ -856,6 +872,7 @@ std::string SafeFunctionName(const Descriptor* descriptor,
   return function_name;
 }
 
+
 bool IsStringInlined(const FieldDescriptor* descriptor,
                      const Options& options) {
   (void)descriptor;

src/google/protobuf/compiler/cpp/message.cc

@@ -790,10 +790,12 @@ void MessageGenerator::GenerateFieldAccessorDeclarations(io::Printer* printer) {
 
     std::map<std::string, std::string> vars;
     SetCommonFieldVariables(field, &vars, options_);
+
     format.AddMap(vars);
 
       if (field->is_repeated()) {
-      format("$deprecated_attr$int ${1$$name$_size$}$() const$2$\n", field,
+        format(
+            "$deprecated_attr$int ${1$$name$_size$}$() const$2$\n", field,
             !IsFieldStripped(field, options_) ? ";" : " {__builtin_trap();}");
         if (!IsFieldStripped(field, options_)) {
           format(
@@ -803,7 +805,8 @@ void MessageGenerator::GenerateFieldAccessorDeclarations(io::Printer* printer) {
               field);
         }
       } else if (HasHasMethod(field)) {
-      format("$deprecated_attr$bool ${1$has_$name$$}$() const$2$\n", field,
+        format(
+            "$deprecated_attr$bool ${1$has_$name$$}$() const$2$\n", field,
             !IsFieldStripped(field, options_) ? ";" : " {__builtin_trap();}");
         if (!IsFieldStripped(field, options_)) {
           format(
@@ -1235,7 +1238,6 @@ void MessageGenerator::GenerateFieldAccessorDefinitions(io::Printer* printer) {
 
     Formatter::SaveState saver(&format);
     format.AddMap(vars);
-
       // Generate has_$name$() or $name$_size().
       if (field->is_repeated()) {
         if (IsFieldStripped(field, options_)) {

src/google/protobuf/compiler/plugin.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/descriptor.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/duration.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/empty.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/field_mask.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/port_def.inc

@@ -189,6 +189,10 @@
 // Used to remove the manipulation of cleared elements in RepeatedPtrField.
 // Owner: mkruskal@
 #define PROTOBUF_FUTURE_REMOVE_CLEARED_API 1
+
+// Used to escape C++20 keywords.
+// Owner: mkruskal@
+#define PROTOBUF_FUTURE_CPP20_KEYWORDS 1
 #else
 #define PROTOBUF_FUTURE_FINAL
 #endif
@@ -196,7 +200,7 @@
 #ifdef PROTOBUF_VERSION
 #error PROTOBUF_VERSION was previously defined
 #endif
-#define PROTOBUF_VERSION 3021001
+#define PROTOBUF_VERSION 3021002
 
 #ifdef PROTOBUF_MIN_HEADER_VERSION_FOR_PROTOC
 #error PROTOBUF_MIN_HEADER_VERSION_FOR_PROTOC was previously defined

src/google/protobuf/source_context.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/struct.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/stubs/common.h

@@ -82,7 +82,7 @@ namespace internal {
 
 // The current version, represented as a single integer to make comparison
 // easier:  major * 10^6 + minor * 10^3 + micro
-#define GOOGLE_PROTOBUF_VERSION 3021001
+#define GOOGLE_PROTOBUF_VERSION 3021002
 
 // A suffix string for alpha, beta or rc releases. Empty for stable releases.
 #define GOOGLE_PROTOBUF_VERSION_SUFFIX ""

src/google/protobuf/test_messages_proto2.proto

@@ -295,3 +295,9 @@ message EnumOnlyProto2 {
 message OneStringProto2 {
   optional string data = 1;
 }
+
+message ProtoWithKeywords {
+  optional int32 inline = 1;
+  optional string concept = 2;
+  repeated string requires = 3;
+}

src/google/protobuf/timestamp.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/type.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/wrappers.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3021001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3021002 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.