chore(deps): update dependency protoc to v30

[renovate]

This PR contains the following updates:

Package	Update	Change
protoc	major	25.1 -> 30.0

---

Release Notes

protocolbuffers/protobuf (protoc)

v30.0: Protocol Buffers v30.0

Compare Source

Announcements

• [AUDIT REQUIRED] This version includes potential breaking changes without a major version bump to: UPB (Python/PHP/Ruby C-Extension), Objective-C, Csharp, Other, Ruby, Python, C++.
  • [UPB (Python/PHP/Ruby C-Extension)] Fix closed enum validation under editions (protocolbuffers/protobuf@72b3eda)
  • [Objective-C] [ObjC] Remove legacy WKT headers. (protocolbuffers/protobuf@d9caebc)
  • [Objective-C] Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
  • [Csharp] Remove deprecated GetPrototype MessageFactory.GetPrototype(), (protocolbuffers/protobuf@c261b49)
  • [Csharp] Python nested message class qualname now contains the outer message name. (Previous qualname has the same result with name for nested message that outer message name was not included) (protocolbuffers/protobuf@0720536)
  • [Csharp] Flip default behavior for handling cmake dependencies. (protocolbuffers/protobuf@9cc685e)
  • [Csharp] Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
  • [Other] Update major version numbers for C++ and Python. (protocolbuffers/protobuf@4997f3d)
  • [Other] Remove deprecated py_proto_library macro. (protocolbuffers/protobuf@1e8e356)
  • [Ruby] Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
  • [Python] Fix closed enum validation under editions (protocolbuffers/protobuf@72b3eda)
  • [Python] Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
  • [Python] Remove deprecated GetDebugString() from protobuf python cpp extension. (protocolbuffers/protobuf@721a452)
  • [Python] Remove deprecated reflection methods (protocolbuffers/protobuf@292f964)
  • [Python] Remove deprecated GetPrototype MessageFactory.GetPrototype(), (protocolbuffers/protobuf@c261b49)
  • [Python] Python nested message class qualname now contains the outer message name. (Previous qualname has the same result with name for nested message that outer message name was not included) (protocolbuffers/protobuf@0720536)
  • [Python] Remove deprecated Python RPC Service Interfaces (protocolbuffers/protobuf@5ba74b1)
  • [Python] Python setdefault behavior change for map field. (protocolbuffers/protobuf@81da6b9)
  • [C++] Prohibit using Bazel+MSVC to build protobuf (protocolbuffers/protobuf@117e7bb)
  • [C++] Remove deprecated Arena::CreateMessage. (protocolbuffers/protobuf@d83a536)
  • [C++] Remove CMake submodule support in favor of fetched or installed dependencies. (protocolbuffers/protobuf@3f06ca4)
  • [C++] Flip default behavior for handling cmake dependencies. (protocolbuffers/protobuf@9cc685e)
  • [C++] Add ASAN poisoning after clearing oneof messages on arena. (protocolbuffers/protobuf@54d068e)
  • [C++] Upgrade return type of type_name() and cpp_type_name() from const char* to absl::string_view. (protocolbuffers/protobuf@a9ad51f)
  • [C++] Remove deprecated RepeatedPtrField::ClearedCount(). (protocolbuffers/protobuf@e8e3253)
  • [C++] Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
  • [C++] Strip ctype from options in C++ (protocolbuffers/protobuf@aebf8b9)
  • [C++] Remove MutableRepeatedFieldRef::Reserve() in reflection (protocolbuffers/protobuf@913f7b0)
  • [C++] Remove deprecated JsonOptions alias. (protocolbuffers/protobuf@e2eb0a1)
  • [C++] Remove deprecated Arena::GetArena. (protocolbuffers/protobuf@30ed452)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.
• Migration Guide will include migration guides for breaking changes (to be updated shortly).

Bazel

• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Remove reference to cc_proto_aspect (protocolbuffers/protobuf@fa02f76)
• Remove deprecated bazel/system_python.bzl alias. (protocolbuffers/protobuf@00f108c)

Compiler

• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (protocolbuffers/protobuf@a7df327)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Have the protoc CLI properly report any parser warnings. (protocolbuffers/protobuf@cafeaa4)
• Split protoc apart from libprotoc in our cmake configs. (protocolbuffers/protobuf@b4b93b3)
• Begin adding extension numbers to SourceCodeInfo and FileDescriptorSet for tooling purposes. (protocolbuffers/protobuf@9d7236b)
• Fix various unsigned to signed comparison warnings. (#​17212) (protocolbuffers/protobuf@67de087)

C++

• Fixing staleness tests (protocolbuffers/protobuf@6abaf77)
• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (protocolbuffers/protobuf@a7df327)
• Backport: Remove if_constexpr usage for future Abseil compatibility (#​20488) (protocolbuffers/protobuf@450ee76)
• Add tests for older gcc versions we still support (#​20463) (protocolbuffers/protobuf@0778473)
• Fix a bug in handling of implicit-presence string_view fields. (#​20403) (protocolbuffers/protobuf@81196ac)
• Make php generator's header public for gRPC (#​20320) (protocolbuffers/protobuf@c07e854)
• Remove rules_rust dependency from MODULE.bazel for 30.x (#​20310) (protocolbuffers/protobuf@b8248f6)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Replace std::any with a custom solution. (#​20251) (protocolbuffers/protobuf@6250d09)
• Make DebugString print debug output, enable debug markers for debug output (protocolbuffers/protobuf@9a03332)
• Fix missing port_undef (#​20052) (protocolbuffers/protobuf@0644388)
• Use __builtin_expect_with_probability for proto field presence checks. (protocolbuffers/protobuf@e958419)
• Enable meta-tagging for redaction purposes (protocolbuffers/protobuf@1f48795)
• Breaking change: Prohibit using Bazel+MSVC to build protobuf (protocolbuffers/protobuf@117e7bb)
• Breaking change: Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Print the presence probability when analysis is enabled. (protocolbuffers/protobuf@d4ba7ff)
• Split protoc apart from libprotoc in our cmake configs. (protocolbuffers/protobuf@b4b93b3)
• Breaking change: Strip ctype from options in C++ (protocolbuffers/protobuf@aebf8b9)
• Breaking change: Remove MutableRepeatedFieldRef::Reserve() in reflection (protocolbuffers/protobuf@913f7b0)
• Remove stale references to C++14. (protocolbuffers/protobuf@f4cc92c)
• Breaking change: Upgrade return type of type_name() and cpp_type_name() from const char* to absl::string_view. (protocolbuffers/protobuf@a9ad51f)
• Update cmake minimum version to >=3.16. (protocolbuffers/protobuf@21f535c)
• Migrate coded output stream arguments from const std::string& to absl::string_view. (protocolbuffers/protobuf@0361a59)
• Breaking change: Remove deprecated Arena::GetArena. (protocolbuffers/protobuf@30ed452)
• Remove the time (or time-based) entropy being added to Map's seed. (protocolbuffers/protobuf@a7875bb)
• Don't use CLOCK_UPTIME_RAW if it won't be defined (#​16951) (protocolbuffers/protobuf@097dcda)
• Fix DEPENDENCIES in protobuf_generate() to accept multiple values instead of silently dropping (protocolbuffers/protobuf@52887e1)
• Use ABSL_PREDICT_TRUE|FALSE instead of PROTOBUF_PREDICT_TRUE|FALSE. (protocolbuffers/protobuf@fd47730)
• Breaking change: Flip default behavior for handling cmake dependencies. (protocolbuffers/protobuf@9cc685e)
• Use [[maybe_unused]] instead of PROTOBUF_UNUSED. (protocolbuffers/protobuf@a7dd155)
• Use [[nodiscard]] instead of PROTOBUF_NODISCARD (protocolbuffers/protobuf@1ceedf8)
• Breaking change: Remove deprecated JsonOptions alias. (protocolbuffers/protobuf@e2eb0a1)
• Generate internal hasbits for singular proto3 implicit presence fields. (protocolbuffers/protobuf@3e82ed4)
• Add name mangling to nested names that collide with known generated names, like (protocolbuffers/protobuf@f2cf85c)
• Breaking change: Remove deprecated RepeatedPtrField::ClearedCount(). (protocolbuffers/protobuf@e8e3253)
• Breaking change: Add ASAN poisoning after clearing oneof messages on arena. (protocolbuffers/protobuf@54d068e)
• Breaking change: Remove deprecated Arena::CreateMessage. (protocolbuffers/protobuf@d83a536)
• Change DynamicCastMessage to throw a std::bad_cast exception when exceptions (protocolbuffers/protobuf@33bbbeb)
• Fixed a missing check in wire format verification. (protocolbuffers/protobuf@2ac862f)
• Comment change: clarifies that the field/value order is based on textual order in the file, not the order of the enums. (protocolbuffers/protobuf@f92335b)
• Bump minimum C++ version to C++17 after branch cut for v29. (protocolbuffers/protobuf@fe53593)
• Bump abseil dependency version from 2023080.1 to 2024072.0. (protocolbuffers/protobuf@c75095b)
• Breaking change: Remove CMake submodule support in favor of fetched or installed dependencies. (protocolbuffers/protobuf@3f06ca4)
• Support fetching CMake dependencies via -Dprotobuf_FETCH_DEPENDENCIES=ON (protocolbuffers/protobuf@d3735bc)
• Avoid field id comparisons in ExtensionSet serialization in case of single range. (protocolbuffers/protobuf@8f6a7a2)
• Let ArenaStringPtr debug-fail if it ever attempts to clear a default string. (protocolbuffers/protobuf@6c9c12c)
• Fix various unsigned to signed comparison warnings. (#​17212) (protocolbuffers/protobuf@67de087)

Java

• Split maven dependencies into dev vs local (#​20549) (#​20558) (protocolbuffers/protobuf@a5c906a)
• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Refactor TextFormat.Printer.MapEntryAdapter to handle more entry types. This will properly sort map keys for DynamicMessage maps. (protocolbuffers/protobuf@84769d3)
• Re-Expose UnderscoresToCapitalizedCamelCase for plugins in OSS. (protocolbuffers/protobuf@94ae26d)
• Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Fix mishandling of open enum + explicit presence fields. (protocolbuffers/protobuf@0ccd845)
• Disable useShortRepeatedPrimitives for Printer.DEFAULT_DEBUG_FORMAT (protocolbuffers/protobuf@1900cbe)
• Optimize Java gencode version validation (protocolbuffers/protobuf@59a8de6)
• Make Java consistently reject unmatched end-group tag. (protocolbuffers/protobuf@a4d4bfe)
• Make Java-lite reject unmatched end-group tag. (protocolbuffers/protobuf@84e81cf)
• Fix handling of implicit field presence in mergeFrom to match the behavior in other places. (protocolbuffers/protobuf@3e0f82e)
• Use ABSL_PREDICT_TRUE|FALSE instead of PROTOBUF_PREDICT_TRUE|FALSE. (protocolbuffers/protobuf@fd47730)
• Use [[maybe_unused]] instead of PROTOBUF_UNUSED. (protocolbuffers/protobuf@a7dd155)
• Remove deprecation warnings for Timestamp and Duration add/subtract/between that we do not yet have alternatives to. (protocolbuffers/protobuf@f6cddd2)
• Add support to print repeated fields with primitive values using short notation (protocolbuffers/protobuf@b8d3567)
• Fix unexpected NumberFormatException in Durations.parse() by replacing with documented thrown ParseException. (protocolbuffers/protobuf@ee5aa49)
• Give Kotlin jars an OSGi Manifest (#​18812) (protocolbuffers/protobuf@27ddb9c)
• Lite: Remove intermediary dynamicMethod function trampolines (protocolbuffers/protobuf@25724ab)
• Speed up SingleFieldBuilder.getBuilder() by avoiding reloading this.builder at return. (protocolbuffers/protobuf@f7b0faf)
• Restore runtime compatibility with 3.22.x gencode by re-adding the mutableCopy(list) methods. (protocolbuffers/protobuf@6628b8a)
• CodedOutputStream: Avoid updating position to go beyond end of array. (protocolbuffers/protobuf@24160d5)
• Fix various unsigned to signed comparison warnings. (#​17212) (protocolbuffers/protobuf@67de087)
• Throw more informative OutOfSpaceExceptions when we run out of space serializing a proto. (protocolbuffers/protobuf@bc24489)

Kotlin

• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Give Kotlin jars an OSGi Manifest (#​18812) (protocolbuffers/protobuf@27ddb9c)

Csharp

• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Breaking change: Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Support tuples when parsing JSON dicts (protocolbuffers/protobuf@75bb72e)
• Don't use CLOCK_UPTIME_RAW if it won't be defined (#​16951) (protocolbuffers/protobuf@097dcda)
• Breaking change: Python nested message class qualname now contains the outer message name. (Previous qualname has the same result with name for nested message that outer message name was not included) (protocolbuffers/protobuf@0720536)
• Fix a Python bug: when package is empty, DescriptorDatabase FindFileContainingSymbol method will able to find symbol names not start with '.' (protocolbuffers/protobuf@610702e)
• Throw InvalidProtocolBufferException when parsing invalid UTF-8 in C#. (protocolbuffers/protobuf@db9b2c8)
• Use ABSL_PREDICT_TRUE|FALSE instead of PROTOBUF_PREDICT_TRUE|FALSE. (protocolbuffers/protobuf@fd47730)
• Breaking change: Flip default behavior for handling cmake dependencies. (protocolbuffers/protobuf@9cc685e)
• Use [[maybe_unused]] instead of PROTOBUF_UNUSED. (protocolbuffers/protobuf@a7dd155)
• Breaking change: Remove deprecated GetPrototype MessageFactory.GetPrototype(), (protocolbuffers/protobuf@c261b49)

Objective-C

• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Generate Kythe annotations for objc messages. (protocolbuffers/protobuf@8868171)
• Breaking change: Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Update minimum supported macOS 11 (protocolbuffers/protobuf@9f1b38e)
• Breaking change: [ObjC] Remove legacy WKT headers. (protocolbuffers/protobuf@d9caebc)
• [ObjC] Breaking Change: Remove deprecated apis. (protocolbuffers/protobuf@2a52b90)
• [ObjC] Breaking Change: Remove support for older generated code. (protocolbuffers/protobuf@cffa590)
• [ObjC] Breaking Change: Remove GPBUnknownFieldSet. (protocolbuffers/protobuf@2b93422)

Rust

• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• See also UPB changes below, which may affect Rust.

Python

• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Fix missing port_undef (#​20052) (protocolbuffers/protobuf@0644388)
• Python protobuf: kwargs initialization now allows dict() for proto map values. (protocolbuffers/protobuf@6235687)
• Python: Improve refleak checker for Python 3.12. (protocolbuffers/protobuf@336d6f0)
• Rename bazel "pip_deps" hub_name. (protocolbuffers/protobuf@32838e8)
• Breaking change: Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Add has_options to ServiceDescriptor and MethodDescriptor in UPB python and cpp python to match with other descriptors and pure python (protocolbuffers/protobuf@4214ee7)
• Nextgen Proto Pythonic API: Add byte_size(), clear_message() and clear_field() APIs in proto module (protocolbuffers/protobuf@975bb07)
• Nextgen Proto Pythonic API: “Add-on” proto for Text Format serialize/parse (protocolbuffers/protobuf@e9fa879)
• Fix bug that DiscardUnknownFields did not discard unknown fields of extensions in Py-upb and Php-upb and ruby-upb. (protocolbuffers/protobuf@98aab04)
• Remove the entire pb_unit_tests/ directory with reflection_test_wrapper. (protocolbuffers/protobuf@39808bc)
• Performance optimization for upb python extend repeated scalars. (protocolbuffers/protobuf@6c3ff5a)
• Ensure protobuf Message.dir returns proto fields (protocolbuffers/protobuf@1803f8b)
• Breaking change: Fix closed enum validation under editions (protocolbuffers/protobuf@72b3eda)
• Make python text-format reject octal floats (protocolbuffers/protobuf@8f2ad12)
• Treat -0.0 as consistently distinct from 0.0 in pure python (protocolbuffers/protobuf@bc16fe8)
• Remove decoder.SkipField. (protocolbuffers/protobuf@1b0b1c9)
• Make Pure Python reject unmatched end-group tag in unknown fields (protocolbuffers/protobuf@f69ea1c)
• Make Python/C++ reject unmatched end-group tag. (protocolbuffers/protobuf@482752a)
• Override protobuf Message.dir method (protocolbuffers/protobuf@9668016)
• Add "absl::StatusOr GetConstMessagePointer(PyObject* msg)" in proto_api which works with cpp extension, upb and pure python. (protocolbuffers/protobuf@b9e69e8)
• Fix a python bug that UPB and Python C++ extension assume MessageSet extensions are ordered first (protocolbuffers/protobuf@3781f45)
• Drop Python 3.8 support (protocolbuffers/protobuf@f5a2937)
• Fix a python bug for text_format pretty print when Struct in Any (protocolbuffers/protobuf@d3e9897)
• Support tuples when parsing JSON dicts (protocolbuffers/protobuf@75bb72e)
• Breaking change: Python nested message class qualname now contains the outer message name. (Previous qualname has the same result with name for nested message that outer message name was not included) (protocolbuffers/protobuf@0720536)
• Breaking change: Python setdefault behavior change for map field. (protocolbuffers/protobuf@81da6b9)
• Fix a Python bug: when package is empty, DescriptorDatabase FindFileContainingSymbol method will able to find symbol names not start with '.' (protocolbuffers/protobuf@610702e)
• Use ABSL_PREDICT_TRUE|FALSE instead of PROTOBUF_PREDICT_TRUE|FALSE. (protocolbuffers/protobuf@fd47730)
• Breaking change: Remove deprecated GetPrototype MessageFactory.GetPrototype(), (protocolbuffers/protobuf@c261b49)
• Breaking change: Remove deprecated GetDebugString() from protobuf python cpp extension. (protocolbuffers/protobuf@721a452)
• Add Python 3.13 test coverage (protocolbuffers/protobuf@7060d3d)
• Fix a python bug when assign an empty Struct at creation. (protocolbuffers/protobuf@47613cf)
• Add "PythonMessageMutator GetClearedMutableMessage(PyObject *);" in proto_api which works with cpp extension, upb and pure python. (protocolbuffers/protobuf@5706140)
• Breaking change: Remove deprecated reflection methods (protocolbuffers/protobuf@292f964)
• Breaking change: Remove deprecated Python RPC Service Interfaces (protocolbuffers/protobuf@5ba74b1)
• Fix pyi generation for messages with a field named "self" (protocolbuffers/protobuf@fa858b8)

PHP

• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Handle optional fields correctly in Message_get method (#​18982) (protocolbuffers/protobuf@f1aa92a)
• Delete long-deprecated internal descriptor.proto gencode forwards. (protocolbuffers/protobuf@cf9b774)
• Restore runtime compatibility with 3.22.x gencode by re-adding the mutableCopy(list) methods. (protocolbuffers/protobuf@6628b8a)

PHP C-Extension

• Upb: Update _upb_map_next signature to return a boolean and remove the _nextmutable Map iterator API. (#​20467) (protocolbuffers/protobuf@0913d39)
• Add to_proto to descriptor classes (#​19971) (protocolbuffers/protobuf@74122eb)
• Fix bug that DiscardUnknownFields did not discard unknown fields of extensions in Py-upb and Php-upb and ruby-upb. (protocolbuffers/protobuf@98aab04)
• Raise ParseError for non-numeric strings in numeric fields in Ruby and PHP JSON parsing. (protocolbuffers/protobuf@abb197c)
• Handle optional fields correctly in Message_get method (#​18982) (protocolbuffers/protobuf@f1aa92a)
• Restore runtime compatibility with 3.22.x gencode by re-adding the mutableCopy(list) methods. (protocolbuffers/protobuf@6628b8a)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Add to_proto to descriptor classes (#​19971) (protocolbuffers/protobuf@74122eb)
• Support ruby 3.4 (#​19752) (protocolbuffers/protobuf@4a92a1c)
• Breaking change: Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Add a multi-platform Gemfile.lock (#​19804) (protocolbuffers/protobuf@56f318d)
• Fix ruby has_...? method (#​19731) (protocolbuffers/protobuf@4031c19)
• Raise ParseError for non-numeric strings in numeric fields in Ruby and PHP JSON parsing. (protocolbuffers/protobuf@abb197c)
• Error if assigning a "UTF-8" string with invalid UTF-8. (protocolbuffers/protobuf@2f505a7)
• Third_party/utf8_range: support arm neon (#​18126) (protocolbuffers/protobuf@d83ad15)

Ruby C-Extension

• Upb: Update _upb_map_next signature to return a boolean and remove the _nextmutable Map iterator API. (#​20467) (protocolbuffers/protobuf@0913d39)
• Add to_proto to descriptor classes (#​19971) (protocolbuffers/protobuf@74122eb)
• Ruby: make it possible to specify compiler for C extension (#​19863) (protocolbuffers/protobuf@b46f315)
• Fix bug that DiscardUnknownFields did not discard unknown fields of extensions in Py-upb and Php-upb and ruby-upb. (protocolbuffers/protobuf@98aab04)
• Fix ruby has_...? method (#​19731) (protocolbuffers/protobuf@4031c19)
• Raise ParseError for non-numeric strings in numeric fields in Ruby and PHP JSON parsing. (protocolbuffers/protobuf@abb197c)
• Error if assigning a "UTF-8" string with invalid UTF-8. (protocolbuffers/protobuf@2f505a7)
• Update minimum supported macOS 11 (protocolbuffers/protobuf@9f1b38e)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Upb: Update _upb_map_next signature to return a boolean and remove the _nextmutable Map iterator API. (#​20467) (protocolbuffers/protobuf@0913d39)
• Change upb C generated map iteration function to not hand out MapEntry pointers. (#​20462) (protocolbuffers/protobuf@503abcc)
• Run buildifier (protocolbuffers/protobuf@bf712cc)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Add to_proto to descriptor classes (#​19971) (protocolbuffers/protobuf@74122eb)
• Randomize upb's map ordering (protocolbuffers/protobuf@066531d)
• Fix bug that DiscardUnknownFields did not discard unknown fields of extensions in Py-upb and Php-upb and ruby-upb. (protocolbuffers/protobuf@98aab04)
• Add three conformance test edge cases for ProtoJSON repr of Any (protocolbuffers/protobuf@b985164)
• Breaking change: Fix closed enum validation under editions (protocolbuffers/protobuf@72b3eda)
• Raise ParseError for non-numeric strings in numeric fields in Ruby and PHP JSON parsing. (protocolbuffers/protobuf@abb197c)
• Fix issue where a tmp buffer could have been too small when handling a serialized FeatureSet. (protocolbuffers/protobuf@eb8a34d)
• Fixed comparison of empty repeated/map extensions. (protocolbuffers/protobuf@a79fbc9)
• Fix a python bug that UPB and Python C++ extension assume MessageSet extensions are ordered first (protocolbuffers/protobuf@3781f45)
• Support fetching CMake dependencies via -Dprotobuf_FETCH_DEPENDENCIES=ON (protocolbuffers/protobuf@d3735bc)

Other

• Remove test platform specification from release config (#​20475) (protocolbuffers/protobuf@2b9b101)
• Remove reference to rules_rust from .bazelrc (#​20470) (protocolbuffers/protobuf@90e893c)
• Protobuf: add //:go_features_proto Bazel alias (#​20419) (protocolbuffers/protobuf@8892adc)
• Fix redundant clang-cl and msvc platform constraint for Bazel 8 compatibility and enable Bazel 8 presubmits in BCR. (protocolbuffers/protobuf@b025ac0)
• Switch BCR presubmit to testing from example module (instead of default dummy module) so we can use .bazelrc and reference @​local_config_cc. (protocolbuffers/protobuf@8171744)
• Move to bazel 7 and turn down support for bazel 6. (protocolbuffers/protobuf@afe2de2)
• Remove Protobuf-C++.podspec release. (protocolbuffers/protobuf@b204518)
• Breaking change: Remove deprecated py_proto_library macro. (protocolbuffers/protobuf@1e8e356)
• Upgrade minimum version of macOS support to macOS 10.15 (Catalina). (protocolbuffers/protobuf@67fca5c)
• Breaking change: Update major version numbers for C++ and Python. (protocolbuffers/protobuf@4997f3d)
• Update protoc release to include editions language features proto for Go (protocolbuffers/protobuf@353d726)
• [ObjC] Breaking Change: Raise the major version for next release. (protocolbuffers/protobuf@213bb61)
• Bump rules_rust to 0.51 to fix #​18546 (protocolbuffers/protobuf@9dad0b9)
• Bazel 8 compatibility for Bazel users, however building test and release targets from source is not compatible with Bazel 8 yet.

v29.3: Protocol Buffers v29.3

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Fix cmake installation location of java and go features (#​19773) (protocolbuffers/protobuf@1dc5842)

Other

• Add .bazeliskrc for protobuf repo to tell bazelisk to use 7.1.2 by default. (#​19884) (protocolbuffers/protobuf@9a5d2c3)
• Update artifact actions to v4 (#​19703) (protocolbuffers/protobuf@8e7e6b0)

v29.2: Protocol Buffers v29.2

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Automated rollback of commit 23aada2. (#​19692) (protocolbuffers/protobuf@1772657)
• Remove unused / invalid C++ lazy repeated field code from OSS. (#​19682) (protocolbuffers/protobuf@3649f87)

Java

• Automated rollback of commit 23aada2. (#​19692) (protocolbuffers/protobuf@1772657)

Other

• Export environment variables so bazelisk picks them up (#​19690) (protocolbuffers/protobuf@8b9d76c)
• Pin staleness check to Bazel 7 (#​19689) (protocolbuffers/protobuf@a1c9b6a)
• Remove CMake downgrade workaround from Windows CI tests (#​19630) (protocolbuffers/protobuf@3a7bb4a)

v29.1: Protocol Buffers v29.1

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Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Java

• Rename maven to protobuf_maven in MODULE.bazel (#​18641) (#​19477) (protocolbuffers/protobuf@ba6da44)

Kotlin

• Rename maven to protobuf_maven in MODULE.bazel (#​18641) (#​19477) (protocolbuffers/protobuf@ba6da44)

Python

• Revert "Remove deprecated service.py usages from test". For 29.x only (#​19434) (protocolbuffers/protobuf@5864b50)

v29.0: Protocol Buffers v29.0

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Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Bazel

• Add missing line to docstring after Args (#​19213) (protocolbuffers/protobuf@6f310d5)
• Fix proto_info_bzl (#​18918) (protocolbuffers/protobuf@083de5f)
• Use rules_cc everywhere in protobuf (protocolbuffers/protobuf@ddadd0b)
• Upgrade rules_cc to 0.0.13 (protocolbuffers/protobuf@3dd4835)
• Convert proto toolchain string to Label (protocolbuffers/protobuf@aa181e2)
• Prepare supporting targets for testing (protocolbuffers/protobuf@a748b10)
• Support --incompatible_enable_proto_toolchain_resolution (protocolbuffers/protobuf@372ddb3)
• Move ProtoInfo and ProtoLangToolchainInfo from Bazel (protocolbuffers/protobuf@426ca8a)
• Move java_{lite_}proto_library from Bazel repository (protocolbuffers/protobuf@d77bdac)
• Move proto_toolchain from rules_proto to protobuf (protocolbuffers/protobuf@9f9cb7a)
• Move proto_library from Bazel repository (protocolbuffers/protobuf@3ff2cf0)
• Move proto_common implementation from Bazel binary (protocolbuffers/protobuf@b19fbe6)

Compiler

• Begin adding extension numbers to SourceCodeInfo and FileDescriptorSet for tooling purposes. (protocolbuffers/protobuf@07e489d)
• Update protoc release to include editions language features proto for Go (#​19013) (protocolbuffers/protobuf@63d966b)
• Introduce lifetimes for individual feature values. (protocolbuffers/protobuf@0b6e768)
• Windows - Fix handling of utf8 command line arguments (#​17854) (protocolbuffers/protobuf@b9d1800)
• Limit feature deprecation warnings to reduce noise. (protocolbuffers/protobuf@5cd9a46)

C++

• Fix C++ ifndef_guard printer to also convert "-" to "_". (protocolbuffers/protobuf@7331b77)
• Fix C++ codegen namespace printer to print closing namespaces in reverse order. (protocolbuffers/protobuf@3bf9c40)
• Fix raw_ptr.cc on exotic architectures (#​18193) (protocolbuffers/protobuf@63f6262)
• Fix cord handling in DynamicMessage and oneofs. (protocolbuffers/protobuf@9e8b30c)
• Fix packed reflection handling bug in edition 2023. (protocolbuffers/protobuf@4c92328)
• Add JsonStreamToMessage method (protocolbuffers/protobuf@0259cc3)
• Introduce lifetimes for individual feature values. (protocolbuffers/protobuf@0b6e768)
• Insert software prefetches into merge functions. This improves performance when hardware prefetchers are disabled on AMD machines. (protocolbuffers/protobuf@d993365)
• Insert software prefetches into proto parsing functions. This improves performance when hardware prefetchers are disabled on AMD platforms. (protocolbuffers/protobuf@8aa0add)
• Add prefetching of subsequent extensions in ExtensionSet::ForEach. (protocolbuffers/protobuf@9b019ee)
• Remove the AnyMetadata class and use free functions instead. (protocolbuffers/protobuf@920d5c3)
• Add [[deprecated]] attribute when generating enums and classes. (protocolbuffers/protobuf@23aada2)
• Use linear search instead of binary search in flat mode of ExtensionSet. (protocolbuffers/protobuf@0ed61f0)
• Prepare MessageLite::GetTypeName to be upgraded to return (protocolbuffers/protobuf@30a8ef5)
• Limit feature deprecation warnings to reduce noise. (protocolbuffers/protobuf@5cd9a46)
• Add Compiler Condition to use inline assembly optimizations with ARM64 for Compatibility with MSVC (#​17671) (protocolbuffers/protobuf@c5f6231)
• Enable small object optimization (SOO) for RepeatedField in order to reduce data indirections. (protocolbuffers/protobuf@e2525e6)
• Return backing array memory to arena in ExtensionSet. (protocolbuffers/protobuf@5ac8ee1)
• In edition 2024, Enum_Name(value) functions return absl::string_view by default. (protocolbuffers/protobuf@e3fa6aa)
• Add Prefetchers to Proto Copy Construct to help address load misses (protocolbuffers/protobuf@cdb7238)
• Reduced nesting in GenerateByteSize: slight readability improvements in generated code. (protocolbuffers/protobuf@162a740)
• Introduce FieldDescriptor::cpp_string_type() API to replace direct ctype inspection which will be removed in the next breaking change (protocolbuffers/protobuf@d0e49df)
• Update the comment of TextFormat::Printer::RegisterMessagePrinter that the method takes ownerhip of the printer pointer. (protocolbuffers/protobuf@d911161)
• Prepare the code for migrating return types from const std::string& to (protocolbuffers/protobuf@e13b8e9)

Java

• Remove deprecation warnings for Timestamp and Duration add/subtract/between that we do not yet have alternatives to. (protocolbuffers/protobuf@f606c13)
• [29.x] Add missing java load (#​19016) (protocolbuffers/protobuf@bb287be)
• Give Kotlin jars an OSGi Manifest (#​18812) (protocolbuffers/protobuf@0c51eba)
• Re-export includingDefaultValueFields in deprecated state for important Cloud customer. (protocolbuffers/protobuf@7321b2f)
• Restore compatibility with 3.22 gencode by re-adding mutableCopy helpers (protocolbuffers/protobuf@1b1e90b)
• Speed up CodedOutputStream by extracting rarely-executed string formatting code (protocolbuffers/protobuf@f8f5136)
• Return constant Value objects for true, false, and "" (protocolbuffers/protobuf@4fbb0c5)
• Optimise CodedOutputS

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