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CHANGES.txt
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2022-07-01 Unreleased version
C++
* cpp_generated_lib_linked support is removed in protoc
* Reduced .pb.o object file size slightly by explicitly instantiating
InternalMetadata templates in the runtime.
* Add C++20 keywords guarded by PROTOBUF_FUTURE_CPP20_KEYWORDS
* Fixed crash in ThreadLocalStorage for pre-C++17 compilers on 32-bit ARM.
* Clarified that JSON API non-OK statuses are not a stable API.
* Added a default implementation of MessageDifferencer::Reporter methods.
* proto2::MapPair is now an alias to std::pair.
* Hide C++ RepeatedField::UnsafeArenaSwap
* Use table-driven parser for reflection based objects.
Kotlin
* Suppress deprecation warnings in Kotlin generated code.
* Kotlin generated code comments now use kdoc format instead of javadoc.
* Escape keywords in package names in proto generated code
* Add Kotlin enum int value getters and setters
Java
* Performance improvement for repeated use of FieldMaskUtil#merge by caching
constructed FieldMaskTrees.
* Optimized Java proto serialization gencode for protos having many extension ranges with few fields in between.
Python
* Changes ordering of printed fields in .pyi files from lexicographic to the same ordering found in the proto descriptor.
Compiler
* Print full path name of source .proto file on error
2022-08-09 version 21.5 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
PHP
* Added getContainingOneof and getRealContainingOneof to descriptor.
* fix PHP readonly legacy files for nested messages
Python
* Fixed comparison of maps in Python.
2022-07-25 version 21.4 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
C++
* Reduce the required alignment of ArenaString from 8 to 4 (#10298)
2022-07-19 version 21.3 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
C++
* Add header search paths to Protobuf-C++.podspec (#10024)
* Fixed Visual Studio constinit errors (#10232)
* Fix #9947: make the ABI compatible between debug and non-debug builds (#10271)
UPB
* Allow empty package names (fixes behavior regression in 4.21.0)
* Fix a SEGV bug when comparing a non-materialized sub-message (#10208)
* Fix several bugs in descriptor mapping containers (eg. descriptor.services_by_name)
* for x in mapping now yields keys rather than values, to match Python conventions and the behavior of the old library.
* Lookup operations now correctly reject unhashable types as map keys.
* We implement repr() to use the same format as dict.
* Fix maps to use the ScalarMapContainer class when appropriate
* Fix bug when parsing an unknown value in a proto2 enum extension (protocolbuffers/upb#717)
PHP
* Add "readonly" as a keyword for PHP and add previous classnames to descriptor pool (#10041)
Python
* Make //:protobuf_python and //:well_known_types_py_pb2 public (#10118)
Bazel
* Add back a filegroup for :well_known_protos (#10061)
2022-06-27 version 21.2 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
C++
* ArenaString improvements (fix alignment issue)
PHP
* API changes for OneOf (#10102)
2022-05-27 version 21.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
C++
* cmake: Revert "Fix cmake install targets (#9822)" (#10060)
* Remove Abseil dependency from CMake build (#10056)
Python
* Update python wheel metadata with more information incl. required python version (#10058)
* Fix segmentation fault when instantiating field via repeated field assignment (#10066)
2022-05-25 version 21.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
C++
* cmake: Call get_filename_component() with DIRECTORY mode instead of PATH mode (#9614)
* Escape GetObject macro inside protoc-generated code (#9739)
* Update CMake configuration to add a dependency on Abseil (#9793)
* Fix cmake install targets (#9822)
* Use __constinit only in GCC 12.2 and up (#9936)
Java
* Update protobuf_version.bzl to separate protoc and per-language java … (#9900)
Python
* Increment python major version to 4 in version.json for python upb (#9926)
* The C extension module for Python has been rewritten to use the upb library.
This is expected to deliver significant performance benefits, especially when
parsing large payloads. There are some minor breaking changes, but these
should not impact most users. For more information see:
https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates
* Fixed win32 build and fixed str(message) on all Windows platforms. (#9976)
* The binary wheel for macOS now supports Apple silicon.
PHP
* [PHP] fix PHP build system (#9571)
* Fix building packaged PHP extension (#9727)
* fix: reserve "ReadOnly" keyword for PHP 8.1 and add compatibility (#9633)
* fix: phpdoc syntax for repeatedfield parameters (#9784)
* fix: phpdoc for repeatedfield (#9783)
* Change enum string name for reserved words (#9780)
* chore: [PHP] fix phpdoc for MapField keys (#9536)
* Fixed PHP SEGV by not writing to shared memory for zend_class_entry. (#9996)
Ruby
* Allow pre-compiled binaries for ruby 3.1.0 (#9566)
* Implement `respond_to?` in RubyMessage (#9677)
* [Ruby] Fix RepeatedField#last, #first inconsistencies (#9722)
* Do not use range based UTF-8 validation in truffleruby (#9769)
* Improve range handling logic of `RepeatedField` (#9799)
* Support x64-mingw-ucrt platform
Other
* [Kotlin] remove redundant public modifiers for compiled code (#9642)
* [C#] Update GetExtension to support getting typed value (#9655)
* Fix invalid dependency manifest when using `descriptor_set_out` (#9647)
* Fix C# generator handling of a field named "none" in a oneof (#9636)
* Add initial version.json file for 21-dev (#9840)
* Remove duplicate java generated code (#9909)
* Cherry-pick PR #9981 into 21.x branch (#10000)
2022-05-19 version 21.0-rc2(C++/Java/Python/PHP/Objective-C/C#/Ruby)
Python
* Fix windows builds
* Throw more helpful error if generated code is out of date
* Fixed two reference leaks
Ruby
* Support x64-mingw-ucrt platform
PHP
* Fix SEGV by not writing to shared memory for zend_class_entry
C#
* Suppress warning CS8981
Other
* Fix Maven release to release actual osx_aarch64 binary
* Fix protoc zips to have the proto files for well known types
2022-05-10 version 21.0-rc1 (C++/Java/Python/PHP/Objective-C/C#/Ruby)
C++
* Rename main cmake/CMakeLists.txt to CMakeLists.txt (#9603)
* avoid allocating memory if all extension are cleared (#9345)
* cmake: Call get_filename_component() with DIRECTORY mode instead of PATH mode (#9614)
* Escape GetObject macro inside protoc-generated code (#9739)
* Update CMake configuration to add a dependency on Abseil (#9793)
* Use __constinit only in GCC 12.2 and up (#9936)
* Refactor generated message class layout
* Optimize tokenizer ParseInteger by removing division
* Reserve exactly the right amount of capacity in ExtensionSet::MergeFrom
* Parse FLT_MAX correctly when represented in JSON
Java
* Update protobuf_version.bzl to separate protoc and per-language java … (#9900)
* 6x speedup in ArrayEncoder.writeUInt32NotTag
* Java generated code is no longer compatible with runtimes 2.6.1 and earlier
Python
* Increment python major version to 4 in version.json for python upb (#9926)
* The C extension module for Python has been rewritten to use the upb library.
This is expected to deliver significant performance benefits, especially when
parsing large payloads. There are some minor breaking changes, but these
should not impact most users. For more information see:
https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates
* Due to the breaking changes for Python, the major version number for Python
has been incremented.
* The binary wheel for macOS now supports Apple silicon.
* In TextFormat, transform UnicodeDecodeError into ParseError.
PHP
* chore: [PHP] fix phpdoc for MapField keys (#9536)
* [PHP] Remove unnecessary zval initialization (#9600)
* [PHP] fix PHP build system (#9571)
* Fix building packaged PHP extension (#9727)
* fix: reserve "ReadOnly" keyword for PHP 8.1 and add compatibility (#9633)
* fix: phpdoc syntax for repeatedfield parameters (#9784)
* fix: phpdoc for repeatedfield (#9783)
* Change enum string name for reserved words (#9780)
* Fixed composer.json to only advertise compatibility with PHP 7.0+. (#9819)
Ruby
* Allow pre-compiled binaries for ruby 3.1.0 (#9566)
* Implement `respond_to?` in RubyMessage (#9677)
* [Ruby] Fix RepeatedField#last, #first inconsistencies (#9722)
* Do not use range based UTF-8 validation in truffleruby (#9769)
* Improve range handling logic of `RepeatedField` (#9799)
* Disable the aarch64 build on macOS until it can be fixed. (#9816)
Other
* [Kotlin] remove redundant public modifiers for compiled code (#9642)
* [C#] Update GetExtension to support getting typed value (#9655)
* Fix invalid dependency manifest when using `descriptor_set_out` (#9647)
* Fix C# generator handling of a field named "none" in a oneof (#9636)
* Add initial version.json file for 21-dev (#9840)
* Remove duplicate java generated code (#9909)
* Fix versioning issues in 3.20.0
Compiler
* Protoc outputs the list of suggested field numbers when invalid field
numbers are specified in the .proto file.
* Require package names to be less than 512 bytes in length
2022-04-21 version 3.20.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
PHP
* Fix building packaged PHP extension (#9727)
Other
* Fix versioning issues in 3.20.0
2022-03-04 version 3.20.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Dropped Ruby 2.3 and 2.4 support for CI and releases. (#9311)
* Added Ruby 3.1 support for CI and releases (#9566).
* Message.decode/encode: Add recursion_limit option (#9218/#9486)
* Allocate with xrealloc()/xfree() so message allocation is visible to the
Ruby GC. In certain tests this leads to much lower memory usage due to more
frequent GC runs (#9586).
* Fix conversion of singleton classes in Ruby (#9342)
* Suppress warning for intentional circular require (#9556)
* JSON will now output shorter strings for double and float fields when possible
without losing precision.
* Encoding and decoding of binary format will now work properly on big-endian
systems.
* UTF-8 verification was fixed to properly reject surrogate code points.
* Unknown enums for proto2 protos now properly implement proto2's behavior of
putting such values in unknown fields.
Java
* Revert "Standardize on Array copyOf" (#9400)
* Resolve more java field accessor name conflicts (#8198)
* Don't support map fields in DynamicMessage.Builder.{getFieldBuilder,getRepeatedFieldBuilder}
* Fix parseFrom to only throw InvalidProtocolBufferException
* InvalidProtocolBufferException now allows arbitrary wrapped Exception types.
* Fix bug in `FieldSet.Builder.mergeFrom`
* Flush CodedOutputStream also flushes underlying OutputStream
* When oneof case is the same and the field type is Message, merge the
subfield. (previously it was replaced.)’
* Add @CheckReturnValue to some protobuf types
* Report original exceptions when parsing JSON
* Add more info to @deprecated javadoc for set/get/has methods
* Fix initialization bug in doc comment line numbers
* Fix comments for message set wire format.
Kotlin
* Add test scope to kotlin-test for protobuf-kotlin-lite (#9518)
* Add orNull extensions for optional message fields.
* Add orNull extensions to all proto3 message fields.
Python
* Dropped support for Python < 3.7 (#9480)
* Protoc is now able to generate python stubs (.pyi) with --pyi_out
* Pin multibuild scripts to get manylinux1 wheels back (#9216)
* Fix type annotations of some Duration and Timestamp methods.
* Repeated field containers are now generic in field types and could be used
in type annotations.
* Protobuf python generated codes are simplified. Descriptors and message
classes' definitions are now dynamic created in internal/builder.py.
Insertion Points for messages classes are discarded.
* has_presence is added for FieldDescriptor in python
* Loosen indexing type requirements to allow valid __index__() implementations
rather than only PyLongObjects.
* Fix the deepcopy bug caused by not copying message_listener.
* Added python JSON parse recursion limit (default 100)
* Path info is added for python JSON parse errors
* Pure python repeated scalar fields will not able to pickle. Convert to list
first.
* Timestamp.ToDatetime() now accepts an optional tzinfo parameter. If
specified, the function returns a timezone-aware datetime in the given time
zone. If omitted or None, the function returns a timezone-naive UTC datetime
(as previously).
* Adds client_streaming and server_streaming fields to MethodDescriptor.
* Add "ensure_ascii" parameter to json_format.MessageToJson. This allows smaller
JSON serializations with UTF-8 or other non-ASCII encodings.
* Added experimental support for directly assigning numpy scalars and array.
* Improve the calculation of public_dependencies in DescriptorPool.
* [Breaking Change] Disallow setting fields to numpy singleton arrays or repeated fields to numpy
multi-dimensional arrays. Numpy arrays should be indexed or flattened explicitly before assignment.
Compiler
* Migrate IsDefault(const std::string*) and UnsafeSetDefault(const std::string*)
* Implement strong qualified tags for TaggedPtr
* Rework allocations to power-of-two byte sizes.
* Migrate IsDefault(const std::string*) and UnsafeSetDefault(const std::string*)
* Implement strong qualified tags for TaggedPtr
* Make TaggedPtr Set...() calls explicitly spell out the content type.
* Check for parsing error before verifying UTF8.
* Enforce a maximum message nesting limit of 32 in the descriptor builder to
guard against stack overflows
* Fixed bugs in operators for RepeatedPtrIterator
* Assert a maximum map alignment for allocated values
* Fix proto1 group extension protodb parsing error
* Do not log/report the same descriptor symbol multiple times if it contains
more than one invalid character.
* Add UnknownFieldSet::SerializeToString and SerializeToCodedStream.
* Remove explicit default pointers and deprecated API from protocol compiler
Arenas
* Change Repeated*Field to reuse memory when using arenas.
* Implements pbarenaz for profiling proto arenas
* Introduce CreateString() and CreateArenaString() for cleaner semantics
* Fix unreferenced parameter for MSVC builds
* Add UnsafeSetAllocated to be used for one-of string fields.
* Make Arena::AllocateAligned() a public function.
* Determine if ArenaDtor related code generation is necessary in one place.
* Implement on demand register ArenaDtor for InlinedStringField
C++
* Enable testing via CTest (#8737)
* Add option to use external GTest in CMake (#8736)
* CMake: Set correct sonames for libprotobuf-lite.so and libprotoc.so (#8635) (#9529)
* Add cmake option `protobuf_INSTALL` to not install files (#7123)
* CMake: Allow custom plugin options e.g. to generate mocks (#9105)
* CMake: Use linker version scripts (#9545)
* Manually *struct Cord fields to work better with arenas.
* Manually destruct map fields.
* Generate narrower code
* Fix https://github.com/protocolbuffers/protobuf/issues/9378 by removing
shadowed _cached_size_ field
* Remove GetPointer() and explicit nullptr defaults.
* Add proto_h flag for speeding up large builds
* Add missing overload for reference wrapped fields.
* Add MergedDescriptorDatabase::FindAllFileNames()
* RepeatedField now defines an iterator type instead of using a pointer.
* Remove obsolete macros GOOGLE_PROTOBUF_HAS_ONEOF and GOOGLE_PROTOBUF_HAS_ARENAS.
PHP
* Fix: add missing reserved classnames (#9458)
* PHP 8.1 compatibility (#9370)
C#
* Fix trim warnings (#9182)
* Fixes NullReferenceException when accessing FieldDescriptor.IsPacked (#9430)
* Add ToProto() method to all descriptor classes (#9426)
* Add an option to preserve proto names in JsonFormatter (#6307)
Objective-C
* Add prefix_to_proto_package_mappings_path option. (#9498)
* Rename `proto_package_to_prefix_mappings_path` to `package_to_prefix_mappings_path`. (#9552)
* Add a generation option to control use of forward declarations in headers. (#9568)
2022-01-28 version 3.19.4 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Python
* Make libprotobuf symbols local on OSX to fix issue #9395 (#9435)
Ruby
* Fixed a data loss bug that could occur when the number of `optional`
fields in a message is an exact multiple of 32. (#9440).
PHP
* Fixed a data loss bug that could occur when the number of `optional`
fields in a message is an exact multiple of 32. (#9440).
2022-01-10 version 3.19.3 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Python
* Fix missing Windows wheel for Python 3.10 on PyPI
2022-01-05 version 3.19.2 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Java
* Improve performance characteristics of UnknownFieldSet parsing (#9371)
* This release addresses a Security Advisory for Java users
(https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-wrvw-hg22-4m67)
2022-01-05 version 3.18.2 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Java
* Improve performance characteristics of UnknownFieldSet parsing (#9371)
* This release addresses a Security Advisory for Java users
(https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-wrvw-hg22-4m67)
2022-01-05 version 3.16.1 (Java)
Java
* Improve performance characteristics of UnknownFieldSet parsing (#9371)
* This release addresses a Security Advisory for Java users
(https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-wrvw-hg22-4m67)
2021-10-28 version 3.19.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Bazel
* Ensure that release archives contain everything needed for Bazel (#9131)
* Align dependency handling with Bazel best practices (#9165)
JavaScript
* Fix `ReferenceError: window is not defined` when getting the global object (#9156)
Ruby
* Fix memory leak in MessageClass.encode (#9150)
2021-10-15 version 3.19.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
C++
* Make proto2::Message::DiscardUnknownFields() non-virtual
* Separate RepeatedPtrField into its own header file
* For default floating point values of 0, consider all bits significant
* cmake: support `MSVC_RUNTIME_LIBRARY` property (#8851)
* Fix shadowing warnings (#8926)
* Fix for issue #8484, constant initialization doesn't compile in msvc clang-cl environment (#8993)
* Fix build on AIX and SunOS (#8373) (#9065)
* Add Android stlport and default toolchains to BUILD. (#8290)
Java
* For default floating point values of 0, consider all bits significant
* Annotate `//java/com/google/protobuf/util/...` with nullness annotations
* Use ArrayList copy constructor (#7853)
Kotlin
* Switch Kotlin proto DSLs to be implemented with inline value classes
* Fix inlining and deprecation for repeated string fields in kotlin (#9120)
Python
* Proto2 DecodeError now includes message name in error message
* Make MessageToDict convert map keys to strings (#8122)
* Add python-requires in setup.py (#8989)
* Add python 3.10 (#9034)
JavaScript
* Skip exports if not available by CommonJS (#8856)
* JS: Comply with CSP no-unsafe-eval. (#8864)
PHP
* Added "object" as a reserved name for PHP (#8962)
Ruby
* Override Map.clone to use Map's dup method (#7938)
* Ruby: build extensions for arm64-darwin (#8232)
* Add class method Timestamp.from_time to ruby well known types (#8562)
* Adopt pure ruby DSL implementation for JRuby (#9047)
* Add size to Map class (#8068)
* Fix for descriptor_pb.rb: google/protobuf should be required first (#9121)
C#
* Correctly set ExtensionRegistry when parsing with MessageParser, but using an already existing CodedInputStream (#7246)
* [C#] Make FieldDescriptor propertyName public (#7642)
2021-10-04 version 3.18.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Python
* Update setup.py to reflect that we now require at least Python 3.5 (#8989)
* Performance fix for DynamicMessage: force GetRaw() to be inlined (#9023)
Ruby
* Update ruby_generator.cc to allow proto2 imports in proto3 (#9003)
2021-09-13 version 3.18.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Python
* Removed Python 2.x support.
* Pure python descriptor_pool.AddSerializedFile() will always build the
file and return FileDescriptor which is same with python c++ extension
* type errors thrown by MergeFrom now report fully qualified class names
* Protobuf python generated code are simplified. Some platforms that uses
"is"("is not") to compare the enum or descriptor's label/type may fail,
should use "=="("!=") instead.
C++
* Generated code now uses the c++11 standard integer types int{32,64}_t and
uint{32,64}_t
* Reduce memory usage of the DescriptorPool type.
* Moved the zero-argument New() method on messages to the base class (internal
optimization).
* Unused return values marked with `PROTOBUF_MUST_USE_RESULT` are now
correctly attributed.
* Demotes PrintPath log for maps in MessageDifferencer down from WARNING to
INFO.
* Make sure FullMessageName() is always private.
* Fix race condition in EnumDescriptor.
* Remove MessageLite::GetMaybeArenaPointer.
Java
* Add @deprecated javadoc for set/get/has methods
* correctly decode \? escape sequence in text protos
* Avoid depending on Objects.requireNonNull() until we can verify that no
users are depending on older Android versions.
* disallow null string map values in put and putAll
* Add `@CheckReturnValue` to `ByteString` API.
* Make the `hasPresence` method public in `FieldDescriptor`.
* Report more detailed messages in Duration and Timestamp proto parsing
errors.
* New Timestamps.fromDate utility method that converts a java.util.Date to a
Timestamp proto object.
Kotlin
* Generated Kotlin code is Explicit API mode compatible
2021-09-13 version 3.18.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
C++
* Fix warnings raised by clang 11 (#8664)
* Make StringPiece constructible from std::string_view (#8707)
* Add missing capability attributes for LLVM 12 (#8714)
* Stop using std::iterator (deprecated in C++17). (#8741)
* Move field_access_listener from libprotobuf-lite to libprotobuf (#8775)
* Fix #7047 Safely handle setlocale (#8735)
* Remove deprecated version of SetTotalBytesLimit() (#8794)
* Support arena allocation of google::protobuf::AnyMetadata (#8758)
* Fix undefined symbol error around SharedCtor() (#8827)
* Fix default value of enum(int) in json_util with proto2 (#8835)
* Better Smaller ByteSizeLong
* Introduce event filters for inject_field_listener_events
* Reduce memory usage of DescriptorPool
* For lazy fields copy serialized form when allowed.
* Re-introduce the InlinedStringField class
* v2 access listener
* Reduce padding in the proto's ExtensionRegistry map.
* GetExtension performance optimizations
* Make tracker a static variable rather than call static functions
* Support extensions in field access listener
* Annotate MergeFrom for field access listener
* Fix incomplete types for field access listener
* Add map_entry/new_map_entry to SpecificField in MessageDifferencer. They
record the map items which are different in MessageDifferencer's reporter.
* Reduce binary size due to fieldless proto messages
* TextFormat: ParseInfoTree supports getting field end location in addition to
start.
* Fix repeated enum extension size in field listener
* Enable Any Text Expansion for Descriptors::DebugString()
* Switch from int{8,16,32,64} to int{8,16,32,64}_t
* Reduce memory usage of the DescriptorPool type.
Java
* Fix errorprone conflict (#8723)
* Removing deprecated TimeUtil class. (#8749)
* Optimized FieldDescriptor.valueOf() to avoid array copying.
* Removing deprecated TimeUtil class.
* Add Durations.parseUnchecked(String) and Timestamps.parseUnchecked(String)
* FieldMaskUtil: Add convenience method to mask the fields out of a given proto.
JavaScript
* Optimize binary parsing of repeated float64
* Fix for optimization when reading doubles from binary wire format
* Replace toArray implementation with toJSON.
Python
* Drops support for 2.7 and 3.5.
PHP
* Migrate PHP & Ruby to ABSL wyhash (#8854)
* Added support for PHP 8.1 (currently in RC1) to the C extension (#8964)
* Fixed PHP SEGV when constructing messages from a destructor. (#8969)
Ruby
* Move DSL implementation from C to pure Ruby (#8850)
* Fixed a memory bug with RepeatedField#+. (#8970)
Other
* [csharp] ByteString.CreateCodedInput should use ArraySegment offset and count (#8740)
* [ObjC] Add support for using the proto package to prefix symbols. (#8760)
* field_presence.md: fix Go example (#8788)
Kotlin
* Suppress NOTHING_TO_INLINE in Kotlin generated inline functions.
2021-06-04 version 3.17.3 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Python
* Note: This is the last release to support Python 2.7. Future releases will
require Python >= 3.5.
C++
* Introduce FieldAccessListener.
* Stop emitting boilerplate {Copy/Merge}From in each ProtoBuf class
* Fixed some uninitialized variable warnings in generated_message_reflection.cc.
Kotlin
* Fix duplicate proto files error (#8699)
Java
* Fixed parser to check that we are at a proper limit when a sub-message has
finished parsing.
2021-05-25 version 3.17.2 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Kotlin
* Fix duplicate class error (#8653)
PHP
* Fixed SEGV in sub-message getters for well-known types when message is unset
(#8670)
2021-05-07 version 3.17.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
PHP
* Fixed PHP memory leaks and arginfo errors. (#8614)
* Fixed JSON parser to allow multiple values from the same oneof as long as
all but one are null.
Ruby
* Fixed memory bug: properly root repeated/map field when assigning. (#8639)
* Fixed JSON parser to allow multiple values from the same oneof as long as
all but one are null.
2021-05-07 version 3.17.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Protocol Compiler
* Fix the generated source information for reserved values in Enums.
C++
* Fix -Wunused-parameter in map<string, int> fields (fixes #8494) (#8500)
* Use byteswap.h when building against musl libc (#8503)
* Fix -Wundefined-inline error when using SharedCtor() or SharedDtor() (#8532)
* Fix bug where `Descriptor::DebugString()` printed proto3 synthetic oneofs.
* Provide stable versions of `SortAndUnique()`.
* Make sure to cache proto3 optional message fields when they are cleared.
* Expose UnsafeArena methods to Reflection.
* Use std::string::empty() rather than std::string::size() > 0.
Kotlin
* Restrict extension setter and getter operators to non-nullable T.
Java
* updating GSON and Guava to more recent versions (#8524)
* Reduce the time spent evaluating isExtensionNumber by storing the extension
ranges in a TreeMap for faster queries. This is particularly relevant for
protos which define a large number of extension ranges, for example when
each tag is defined as an extension.
* Fix java bytecode estimation logic for optional fields.
* Optimize Descriptor.isExtensionNumber.
Python
* Add MethodDescriptor.CopyToProto() (#8327)
* Remove unused python_protobuf.{cc,h} (#8513)
* Start publishing python aarch64 manylinux wheels normally (#8530)
* Fix constness issue detected by MSVC standard conforming mode (#8568)
* Make JSON parsing match C++ and Java when multiple fields from the same
oneof are present and all but one is null.
Ruby
* Add support for proto3 json_name in compiler and field definitions (#8356)
* Fixed memory leak of Ruby arena objects. (#8461)
* Fix source gem compilation (#8471)
* Fix various exceptions in Ruby on 64-bit Windows (#8563)
* Fix crash when calculating Message hash values on 64-bit Windows (#8565)
Conformance Tests
* Added a conformance test for the case of multiple fields from the same
oneof.
2021-04-06 version 3.16.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Other
* Opensourcing kotlin protos (#8272)
* Use a newer version of rules_proto, with the new rule `proto_descriptor_set` (#8469)
C++
* Fix compiler warnings issue found in conformance_test_runner #8189 (#8190)
* Fix MinGW-w64 build issues. (#8286)
* [Protoc] C++ Resolved an issue where NO_DESTROY and CONSTINIT are in incorrect order (#8296)
* Fix PROTOBUF_CONSTINIT macro redefinition (#8323)
* Delete StringPiecePod (#8353)
* Fix gcc error: comparison of unsigned expression in '>= 0' is always … (#8309)
* Fix cmake install on iOS (#8301)
* Create a CMake option to control whether or not RTTI is enabled (#8347)
* Fix endian.h location on FreeBSD (#8351)
* Refactor util::Status (#8354)
* Make util::Status more similar to absl::Status (#8405)
* Fix -Wsuggest-destructor-override for generated C++ proto classes. (#8408)
* Refactor StatusOr and StringPiece (#8406)
* Refactor uint128 (#8416)
* The ::pb namespace is no longer exposed due to conflicts.
* Allow MessageDifferencer::TreatAsSet() (and friends) to override previous
calls instead of crashing.
* Reduce the size of generated proto headers for protos with `string` or
`bytes` fields.
* Move arena() operation on uncommon path to out-of-line routine
* For iterator-pair function parameter types, take both iterators by value.
* Code-space savings and perhaps some modest performance improvements in
RepeatedPtrField.
* Eliminate nullptr check from every tag parse.
* Remove unused _$name$_cached_byte_size_ fields.
* Serialize extension ranges together when not broken by a proto field in the
middle.
* Do out-of-line allocation and deallocation of string object in ArenaString.
* Streamline ParseContext::ParseMessage<T> to avoid code bloat and improve
performance.
* New member functions RepeatedField::Assign, RepeatedPtrField::{Add, Assign}.
* Fix undefined behavior warning due to innocuous uninitialization of value
on an error path.
* Avoid expensive inlined code space for encoding message length for messages
>= 128 bytes and instead do a procedure call to a shared out-of-line routine.
* util::DefaultFieldComparator will be final in a future version of protobuf.
Subclasses should inherit from SimpleFieldComparator instead.
C#
* Add .NET 5 target and improve WriteString performance with SIMD (#8147)
Java
* deps: update JUnit and Truth (#8319)
* Detect invalid overflow of byteLimit and return InvalidProtocolBufferException as documented.
* Exceptions thrown while reading from an InputStream in parseFrom are now
included as causes.
* Support potentially more efficient proto parsing from RopeByteStrings.
* Clarify runtime of ByteString.Output.toStringBuffer().
* Added UnsafeByteOperations to protobuf-lite (#8426)
JavaScript
* Make Any.pack() chainable.
Python
* Fix some constness / char literal issues being found by MSVC standard conforming mode (#8344)
* Switch on "new" buffer API (#8339)
* Enable crosscompiling aarch64 python wheels under dockcross manylinux docker image (#8280)
* Fixed a bug in text format where a trailing colon was printed for repeated field.
* When TextFormat encounters a duplicate message map key, replace the current
one instead of merging.
Objective-C
* Move the class map to a CFDictionary. (#8328)
PHP
* read_property() handler is not supposed to return NULL (#8362)
* Changed parameter type from long to integer (#7613)
* fix: README supported PHP version for C extension (#8236)
Ruby
* Fixed quadratic memory usage when appending to arrays. (#8364)
* Fixed memory leak of Ruby arena objects. (#8461)
* Add support for proto3 json_name in compiler and field definitions. (#8356)
Other
* Some doc on AOT compilation and protobuf (#8294)
* [CMake] Ability to pass options to protoc executable from cmake (#8374)
* Add --fatal_warnings flag to treat warnings as errors (#8131)
* [bazel] Remove deprecated way to depend on googletest (#8396)
* add error returns missing from protoc to prevent it from exiting with… (#8409)
2021-04-07 version 3.15.8 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Fixed memory leak of Ruby arena objects (#8461)
2021-04-02 version 3.15.7 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
C++
* Remove the ::pb namespace (alias) (#8423)
Ruby
* Fix unbounded memory growth for Ruby <2.7 (#8429)
* Fixed message equality in cases where the message type is different (#8434)
2021-03-10 version 3.15.6 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Fixed bug in string comparison logic (#8386)
2021-03-04 version 3.15.5 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Fixed quadratic memory use in array append (#8379)
PHP
* Fixed quadratic memory use in array append (#8379)
C++
* Do not disable RTTI by default in the CMake build (#8377)
2021-03-02 version 3.15.4 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Fixed SEGV when users pass nil messages (#8363)
* Fixed quadratic memory usage when appending to arrays (#8364)
C++
* Create a CMake option to control whether or not RTTI is enabled (#8361)
PHP
* read_property() handler is not supposed to return NULL (#8362)
2021-02-25 version 3.15.3 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Ruby <2.7 now uses WeakMap too, which prevents memory leaks. (#8341)
2021-02-23 version 3.15.2 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Fix for FieldDescriptor.get(msg) (#8330)
C++
* Fix PROTOBUF_CONSTINIT macro redefinition (#8323)
2021-02-05 version 3.15.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Ruby
* Bugfix for Message.[] for repeated or map fields (#8313)
2021-02-05 version 3.15.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Protocol Compiler
* Optional fields for proto3 are enabled by default, and no longer require
the --experimental_allow_proto3_optional flag.
C++
* MessageDifferencer: fixed bug when using custom ignore with multiple
unknown fields
* Use init_seg in MSVC to push initialization to an earlier phase.
* Runtime no longer triggers -Wsign-compare warnings.
* Fixed -Wtautological-constant-out-of-range-compare warning.
* DynamicCastToGenerated works for nullptr input for even if RTTI is disabled
* Arena is refactored and optimized.
* Clarified/specified that the exact value of Arena::SpaceAllocated() is an
implementation detail users must not rely on. It should not be used in
unit tests.
* Change the signature of Any::PackFrom() to return false on error.
* Add fast reflection getter API for strings.
* Constant initialize the global message instances
* Avoid potential for missed wakeup in UnknownFieldSet
* Now Proto3 Oneof fields have "has" methods for checking their presence in
C++.
* Bugfix for NVCC
* Return early in _InternalSerialize for empty maps.
* Adding functionality for outputting map key values in proto path logging
output (does not affect comparison logic) and stop printing 'value' in the
path. The modified print functionality is in the
MessageDifferencer::StreamReporter.
* Fixed https://github.com/protocolbuffers/protobuf/issues/8129
* Ensure that null char symbol, package and file names do not result in a
crash.
* Constant initialize the global message instances
* Pretty print 'max' instead of numeric values in reserved ranges.
* Removed remaining instances of std::is_pod, which is deprecated in C++20.
* Changes to reduce code size for unknown field handling by making uncommon
cases out of line.
* Fix std::is_pod deprecated in C++20 (#7180)
* Fix some -Wunused-parameter warnings (#8053)
* Fix detecting file as directory on zOS issue #8051 (#8052)
* Don't include sys/param.h for _BYTE_ORDER (#8106)
* remove CMAKE_THREAD_LIBS_INIT from pkgconfig CFLAGS (#8154)
* Fix TextFormatMapTest.DynamicMessage issue#5136 (#8159)
* Fix for compiler warning issue#8145 (#8160)
* fix: support deprecated enums for GCC < 6 (#8164)
* Fix some warning when compiling with Visual Studio 2019 on x64 target (#8125)
Python
* Provided an override for the reverse() method that will reverse the internal
collection directly instead of using the other methods of the BaseContainer.
* MessageFactory.CreateProtoype can be overridden to customize class creation.
* Fix PyUnknownFields memory leak (#7928)
* Add macOS Big Sur compatibility (#8126)
JavaScript
* Generate `getDescriptor` methods with `*` as their `this` type.
* Enforce `let/const` for generated messages.
* js/binary/utils.js: Fix jspb.utils.joinUnsignedDecimalString to work with negative bitsLow and low but non-zero bitsHigh parameter. (#8170)
PHP
* Added support for PHP 8. (#8105)
* unregister INI entries and fix invalid read on shutdown (#8042)
* Fix PhpDoc comments for message accessors to include "|null". (#8136)
* fix: convert native PHP floats to single precision (#8187)
* Fixed PHP to support field numbers >=2**28. (#8235)
* feat: add support for deprecated fields to PHP compiler (#8223)
* Protect against stack overflow if the user derives from Message. (#8248)
* Fixed clone for Message, RepeatedField, and MapField. (#8245)
* Updated upb to allow nonzero offset minutes in JSON timestamps. (#8258)
Ruby
* Added support for Ruby 3. (#8184)
* Rewrote the data storage layer to be based on upb_msg objects from the
upb library. This should lead to much better parsing performance,
particularly for large messages. (#8184).
* Fill out JRuby support (#7923)
* [Ruby] Fix: (SIGSEGV) gRPC-Ruby issue on Windows. memory alloc infinite
recursion/run out of memory (#8195)
* Fix jruby support to handle messages nested more than 1 level deep (#8194)
Java
* Avoid possible UnsupportedOperationException when using CodedInputSteam
with a direct ByteBuffer.
* Make Durations.comparator() and Timestamps.comparator() Serializable.
* Add more detailed error information for dynamic message field type
validation failure
* Removed declarations of functions declared in java_names.h from
java_helpers.h.
* Now Proto3 Oneof fields have "has" methods for checking their presence in
Java.
* Annotates Java proto generated *_FIELD_NUMBER constants.
* Add -assumevalues to remove JvmMemoryAccessor on Android.
C#
* Fix parsing negative Int32Value that crosses segment boundary (#8035)
* Change ByteString to use memory and support unsafe create without copy (#7645)
* Optimize MapField serialization by removing MessageAdapter (#8143)
* Allow FileDescriptors to be parsed with extension registries (#8220)
* Optimize writing small strings (#8149)
2020-11-11 version 3.14.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
Protocol Compiler
* The proto compiler no longer requires a .proto filename when it is not
generating code.
* Added flag `--deterministic_output` to `protoc --encode=...`.
* Fixed deadlock when using google.protobuf.Any embedded in aggregate options.
C++
* Arenas are now unconditionally enabled. cc_enable_arenas no longer has
any effect.
* Removed inlined string support, which is incompatible with arenas.
* Fix a memory corruption bug in reflection when mixing optional and
non-optional fields.
* Make SpaceUsed() calculation more thorough for map fields.
* Add stack overflow protection for text format with unknown field values.
* FieldPath::FollowAll() now returns a bool to signal if an out-of-bounds
error was encountered.
* Performance improvements for Map.
* Minor formatting fix when dumping a descriptor to .proto format with
DebugString.
* UBSAN fix in RepeatedField (#2073).
* When running under ASAN, skip a test that makes huge allocations.
* Fixed a crash that could happen when creating more than 256 extensions in
a single message.
* Fix a crash in BuildFile when passing in invalid descriptor proto.
* Parser security fix when operating with CodedInputStream.
* Warn against the use of AllowUnknownExtension.
* Migrated to C++11 for-range loops instead of index-based loops where
possible. This fixes a lot of warnings when compiling with -Wsign-compare.
* Fix segment fault for proto3 optional (#7805)
* Adds a CMake option to build `libprotoc` separately (#7949)
Java
* Bugfix in mergeFrom() when a oneof has multiple message fields.
* Fix RopeByteString.RopeInputStream.read() returning -1 when told to read
0 bytes when not at EOF.
* Redefine remove(Object) on primitive repeated field Lists to avoid
autoboxing.
* Support "\u" escapes in textformat string literals.
* Trailing empty spaces are no longer ignored for FieldMask.
* Fix FieldMaskUtil.subtract to recursively remove mask.
* Mark enums with `@java.lang.Deprecated` if the proto enum has option
`deprecated = true;`.
* Adding forgotten duration.proto to the lite library (#7738)
Python
* Print google.protobuf.NullValue as null instead of "NULL_VALUE" when it is
used outside WKT Value/Struct.
* Fix bug occurring when attempting to deep copy an enum type in python 3.
* Add a setuptools extension for generating Python protobufs (#7783)
* Remove uses of pkg_resources in non-namespace packages. (#7902)
* [bazel/py] Omit google/__init__.py from the Protobuf runtime. (#7908)
* Removed the unnecessary setuptools package dependency for Python package (#7511)
* Fix PyUnknownFields memory leak (#7928)
PHP
* Added support for "==" to the PHP C extension (#7883)
* Added `==` operators for Map and Array. (#7900)
* Native C well-known types (#7944)
* Optimized away hex2bin() call in generated code (#8006)
* New version of upb, and a new hash function wyhash in third_party. (#8000)
* add missing hasOneof method to check presence of oneof fields (#8003)
Go:
* Update go_package options to reference google.golang.org/protobuf module.
C#:
* annotate ByteString.CopyFrom(ReadOnlySpan<byte>) as SecuritySafeCritical (#7701)
* Fix C# optional field reflection when there are regular fields too (#7705)
* Fix parsing negative Int32Value that crosses segment boundary (#8035)
Javascript:
* JS: parse (un)packed fields conditionally (#7379)
2020-07-14 version 3.13.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
PHP:
* The C extension is completely rewritten. The new C extension has significantly
better parsing performance and fixes a handful of conformance issues. It will
also make it easier to add support for more features like proto2 and proto3 presence.
* The new C extension does not support PHP 5.x. PHP 5.x users can still use pure-PHP.
C++:
* Removed deprecated unsafe arena string accessors
* Enabled heterogeneous lookup for std::string keys in maps.
* Removed implicit conversion from StringPiece to std::string
* Fix use-after-destroy bug when the Map is allocated in the arena.
* Improved the randomness of map ordering
* Added stack overflow protection for text format with unknown fields