Protocol Buffers v3.18.0-rc1

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

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.

PHP

• Migrate PHP & Ruby to ABSL wyhash (#8854)

Ruby

• Move DSL implementation from C to pure Ruby (#8850)

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)

Protocol Buffers v3.17.3

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.

General

• Support M1 (#8557)

Protocol Buffers v3.17.2

Kotlin

• Fix duplicate class error (#8653)

PHP

• Fixed SEGV in sub-message getters for well-known types when message is unset
  (#8670)

Protocol Buffers v3.17.1

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.

Protocol Buffers v3.17.0

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

• Introduce support for Kotlin protos (#8272)
• 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.

Other

• Use a newer version of rules_proto, with the new rule proto_descriptor_set (#8469)

Protocol Buffers v3.17.0-rc2

Update protobuf version to 3.17.0-rc2 (#8586)

* Update protobuf version

* Updated Kotlin versions and updated script to handle them

Protocol Buffers v3.17.0-rc1

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

• [python-runtime] 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

• 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(ruby): Fix various exceptions in Ruby on 64-bit Windows (#8563)
• fix(ruby): 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.

Other

• Opensourcing kotlin protos (#8272)
• Use a newer version of rules_proto, with the new rule proto_descriptor_set (#8469)

Protocol Buffers v3.16.0

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 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)

Protocol Buffers v3.16.0-rc2

Ruby

• Fixed memory leak of Ruby arena objects. (#8462)
• Add support for proto3 json_name in compiler and field definitions. (#8356)

Protocol Buffers v3.15.8

Ruby

• Fixed memory leak of Ruby arena objects (#8461)