Protocol Buffers v32.0-rc1

Announcements

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

Bazel

• Generate .pyi files in py_proto_library (#10366) (#21567) (e3e56c7)
• Introduce denylisted_protos as a preferred replacement for blacklisted_protos attribute. (795ab9d)
• Use native.proto_library for Bazel 7 and explicitly error for Bazel 6 which is incompatible and out of support. (da0077e)
• Require ProtoInfo provider instead of proto_library rule for bazel cc_proto_library deps. (639f1c9)

Compiler

• Deprecate google.protobuf.Method.syntax and google.protobuf.Method.edition (9ec241e)
• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Ban import weak and weak field option in edition 2024 in protoc (parser and c++ runtime). (a2a0511)

C++

• Remove the flag requirement for Bazel+MSVC users. (c6ba697)
• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Cast GetCachedTID() to unsigned to prevent left-shifting a negative number. (3e935cf)
• Update comment at the top of message.h and message_lite.h to document that it should only be extended by gencode and not user code. (6a6ba52)
• Treat warnings encountered in chromium builds as errors. (21c3c53)
• Ban import weak and weak field option in edition 2024 in protoc (parser and c++ runtime). (a2a0511)

Java

• Restore the long-deprecated static functions on TextFormat. (5777d3b)
• Add Kotlin class name helpers to names.h (527b2ab)
• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Update Java gencode base class documentation to clarify that it is not supported to extend them. (c3177fb)
• Add a FieldMaskUtil#trim overload that accepts TrimOptions and allows retaining unset primitive field state. (84c5b63)

Csharp

• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Include also ARM build of protoc in nuget package (#21568) (c2b4040)
• Improve C# handling of Any JSON serialization/deserialization (dc4e429)

Objective-C

• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)

Rust

• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Update Rust generator to output minidescriptors instead of C minitables (1b4b5fc)
• Add [clear_and_]parse_dont_enforce_required() to Rust protobuf. (e2fd7a0)
• Add #[non_exhaustive] on the oneof-case enum (aba2075)
• Impl Clone for RepeatedIter (aca1ed5)
• See also UPB changes below, which may affect Rust.

Python

• Add Python deprecation warnings for Descriptor Label. (64a76e6)
• Updating setuptools to patch CVE-2025-47273 (#22094) (508aba1)
• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Extend gencode compatibility support back to 3.20.0 (1af7fd4)
• Change proto_api work with custom pool for upb and pure python. (49d9e2d)
• Python pyi print "import datetime" for Duration/Timestamp field (f59b84a)
• Add reference leak check to Python well_known_types_test. Fix two refleak bugs. (e5f9ab4)
• Add reference leak check to Python timestamp_test and duration_test. Fix a refleak bug when assign datetime/duration to Timestamp/Duration (e004c8b)
• Add recursion depth limits to pure python (17838be)
• Remove calls to Label within Protobuf Python. (f69180a)
• Change Python .pyi stubs to generated _Optional[] for bool fields same with (6972464)
• Remove internal/api_implementation.Version() (cbad456)
• Fix python proto_api to work with messages that required fields are not set. (f63ed55)
• Fix python upb crashes on map/repeated reference stub destructor (4274909)
• Mark Py JSON float_precision deprecated. (727a8ed)

PHP

• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Fix(php): use count instead of ->count() to avoid bug in c-extension (9fbce62)
• [php][compiler][ext] - Add missing has* methods and other well known types (#20636) (01a7429)
• Fix PHP 8.4 deprecation in GPBDecodeException (#21232) (676666e)

PHP C-Extension

• Change 'getLabel is deprecated' to E_USER_DEPRECATED (158d8ac)
• [php][compiler][ext] - Add missing has* methods and other well known types (#20636) (01a7429)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Enable edition 2024 support in protoc and language generators for cpp, hpb, java, kotlin, objectivec, php, python, pyi, rust. (26843b3)
• Fix silent failure of rb_test rules to run test (#21733) (4f74764)

Ruby C-Extension

• Removed wrap_memcpy.c compatibility shim for pre-2.14 glibc (4ba9733)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Add upb_Message_SetExtensionMessage as a helper for setting a extension field that is a message. This is the extension equivalent of upb_Message_SetBaseFieldMessage. (f15d28a)

Other

• Update github major version tags to be formatted v..- for clarity (e001d57a71c84bce8509ea00...

Protocol Buffers v31.1

Announcements

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

Compiler

• Support allowing late injection of language feature set defaults from FeatureSet extensions while getting feature set extension values. (3419598)

C++

• Support allowing late injection of language feature set defaults from FeatureSet extensions while getting feature set extension values. (3419598)

Java

• Add missing copts attribute (#21982) (bec5b5a)
• Support allowing late injection of language feature set defaults from FeatureSet extensions while getting feature set extension values. (3419598)

Python

• Support allowing late injection of language feature set defaults from FeatureSet extensions while getting feature set extension values. (3419598)
• Python pyi print "import datetime" for Duration/Timestamp field (#21885) (0fe099a)
• Add recursion depth limits to pure python (a3921fb)

Other

• Fix cmake staleness test (96a9ef6)

Protocol Buffers v29.5

Announcements

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

C++

• Remove fast-path check for non-clang compilers in MessageCreator. (#21612) (69cca9b)

Java

• Add volatile to featuresResolved (#20767) (128f0aa)

Python

• Add recursion depth limits to pure python (05ba1a8)
• Internal pure python fixes (1ef3f01)
• Fix: contains check segfaults on empty map (#20446) (#20904) (21fdb7a)

Other

• Re-enable aarch64 tests. (#20853) (03c50e3)

Protocol Buffers v25.8

Announcements

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

Java

• Change pre-22 poison pill to only log once per affected message type. (#21754) (88a3b90)
• Weaken vulnerable gencode poison pill to a warning by default. (320eafa)

Python

• Backport recursion limit enforcement to 25.x (29445be)

Protocol Buffers v31.0

Announcements

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

Bazel

• Loosen py_proto_library check to be on the import path instead of full directory (i.e. excluding external/module-name prefix). (a4be867)

Compiler

• Add support for import option for protoc.(9901db6)
• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (7a26486)
• Move upb minitable code generator into protoc (dce6b0f)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)

C++

• Remove fast-path check for non-clang compilers in MessageCreator. (aa5410d)
• Add missing include. (d390631)
• Add weak attribute to GetClassData to speed up clang builds. (d896480)
• Add nontemporal software prefetcher to repeated ptr field dtor to improve performance. (73f3469)
• Warn on unused RepeatedPtrField. (683e9d2)
• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (7a26486)
• Fix a bug in handling of implicit-presence string_view fields. (bd70a7c)
• Control bounds checks via BUILD flags. (d21e8ef)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)
• Create hardened versions of Get and Mutable for repeated_field. (ffade4a)

Java

• Add weak attribute to GetClassData to speed up clang builds. (d896480)
• Use ProtobufToStringOutput to control the output format of AbstractMessage.Builder.toString. (f5cb162)
• Implement Protobuf Java Immutable API nest_in_file_class feature for Edition 2024. (0416c3e)
• Introduce a Generated annotation to eventually replace javax.annotation.Generated (31e57fc)
• Add volatile to featuresResolved (9e03ca5)
• Fix Java concurrency issue in feature resolution for old <=3.25.x gencode using lazy feature resolution. (fafb0fd)
• Remove Java runtime classes from kotlin release. (079be27)
• Split maven dependencies into dev vs local (#20549) (e045fc6)
• Improve error messaging when detecting and erroring out on integer overflow of byte count limit variables. (097fdb8)

Kotlin

• Remove Java runtime classes from kotlin release. (079be27)

Csharp

• Remove "experimental API" warnings from members in the .NET protobuf runtime. (afea52f)
• Improve performace of repeated packed fixedSize fields (#19667) (85507b9)

Objective-C

• [ObjC] Deprecate GPBFieldDescriptor.isOptional. (86ab252)
• [ObjC] Raise the library version and enable new generated code. (a639cf8)

Rust

• Cherry-pick Rust fix to 31.x (#21617) (01b42bb)
• Add upb_Map_GetMutable API to upb (dd5bf5e)
• See also UPB changes below, which may affect Rust.

Python

• Update GetCurrentTime to use datetime.datetime.now (01b154c)
• Make Py JSON float_precision apply to both float and double fields. (5b54ee3)
• -Add '+' and '-' annotations for Timestamp and Duration in Python (fff783e)
• Bug fix for FieldMask.MergeFrom() with unset fields. (1c87ac3)
• Make python text_format able to skip unknown fields for repeated messages (dcafca2)
• Fix segment fault for UPB Pyhon 'in' method of empty repeated extensions (da04261)
• Fix upb to escape DefinitelyNeedsEscape (like " and ') for bytes field (b234305)
• Check with fallback descriptorDB for FindExtensionByNumber()/FindAllExtensions in UPB python pool. (9fd28d9)
• Add clear() method to repeated fields in Python. (0324f39)
• Register Scalar/MessageMapContainerTypes as virtual subclasses of (9a0b591)
• Fix python codegen crash when C++ features are used. (308aaf4)
• Add more detail to the comment for GetMessageClassesForFiles (9befb58)
• Add constructing unpack routine to Python Protobuf Any API. (fb78c09)
• Implement typing for proto Timestamp/Duration assignments. (0e3326b)

PHP

• Deprecate Descriptor Label. As an alternative, add helper methods for checking whether a field is required or repeated. (d82de8f)
• Feat(php): improve return typehint when repeatedfield (#11734) (e04fe69)

PHP C-Extension

• Automated rollback of commit f9863df. (#21355) (a59988c)
• Deprecate Descriptor Label. As an alternative, add helper methods for checking whether a field is required or repeated. (d82de8f)
• Ruby: Allow to get a file descriptor by a file name (#20287) (c398592)
• Feat(php): improve return typehint when repeatedfield (#11734) (e04fe69)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Fix silent failure of rb_test rules to run test (#21733) (0cf5489)
• Ruby | Add support for a protobuf debug build (#21060) (59e1f0f)
• Ruby | Support installing the gem via git and some other small build tweaks (#21061) (d3560e7)
• Deprecate Descriptor Label. As an alternative, add helper methods for checking whether a field is required or repeated. (d82de8f)
• [Ruby]Implement #to_hash for message classes (#20866) (5596f6d)
• Drop Ruby 3.0 (5de7c80)
• Fixes #18726 ...

Protocol Buffers v31.0-rc2

Announcements

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

Compiler

• Add support for import option for protoc.(9901db6)

PHP

PHP C-Extension

• Automated rollback of commit f9863df. (#21355) (a59988c)

Other

• Patch rules_ruby to apply neverlink = True to the jars rule (#21416) (#21505) (664d94a)

Protocol Buffers v25.7

Announcements

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

Compiler

• Make rules_ruby a dev-only dependency. (#20575) (2dac90d)

C++

• Make rules_ruby a dev-only dependency. (#20575) (2dac90d)

PHP

• Fix(php): do not throw deprecated warning on field getters for default values (#21033) (a4dc75f)

Ruby

• Make rules_ruby a dev-only dependency. (#20575) (2dac90d)

Other

• Update test_cpp.yml (96fca23)
• Backport bumps to aarch64 runners (d4a4426)

Protocol Buffers v31.0-rc1

Announcements

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

Bazel

• Loosen py_proto_library check to be on the import path instead of full directory (i.e. excluding external/module-name prefix). (a4be867)

Compiler

• Implement Protobuf Java Immutable API nest_in_file_class feature for Edition 2024. (0416c3e)
• Fix python codegen crash when C++ features are used. (308aaf4)
• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (7a26486)
• Move upb minitable code generator into protoc (dce6b0f)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)

C++

• Add weak attribute to GetClassData to speed up clang builds. (d896480)
• Implement Protobuf Java Immutable API nest_in_file_class feature for Edition 2024. (0416c3e)
• Add nontemporal software prefetcher to repeated ptr field dtor to improve performance. (73f3469)
• Warn on unused RepeatedPtrField. (683e9d2)
• Fix python codegen crash when C++ features are used. (308aaf4)
• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (7a26486)
• Fix a bug in handling of implicit-presence string_view fields. (bd70a7c)
• Move upb minitable code generator into protoc (dce6b0f)
• Control bounds checks via BUILD flags. (d21e8ef)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)
• Create hardened versions of Get and Mutable for repeated_field. (ffade4a)

Java

• Add weak attribute to GetClassData to speed up clang builds. (d896480)
• Use ProtobufToStringOutput to control the output format of AbstractMessage.Builder.toString. (f5cb162)
• Implement Protobuf Java Immutable API nest_in_file_class feature for Edition 2024. (0416c3e)
• Introduce a Generated annotation to eventually replace javax.annotation.Generated (31e57fc)
• Introduce Java NestInFileClass feature in java_features.proto for Edition 2024. (c8ff762)
• Add volatile to featuresResolved (9e03ca5)
• Fix Java concurrency issue in feature resolution for old <=3.25.x gencode using lazy feature resolution. (fafb0fd)
• Automated rollback of commit 1d4b6ba. (1df3dde)
• Remove Java runtime classes from kotlin release. (079be27)
• Split maven dependencies into dev vs local (#20549) (e045fc6)
• Automated rollback of commit 6d2f6fc. (055297b)
• Improve error messaging when detecting and erroring out on integer overflow of byte count limit variables. (097fdb8)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)

Kotlin

• Remove Java runtime classes from kotlin release. (079be27)

Csharp

• Remove "experimental API" warnings from members in the .NET protobuf runtime. (afea52f)
• Improve performace of repeated packed fixedSize fields (#19667) (85507b9)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)

Objective-C

• [ObjC] Deprecate GPBFieldDescriptor.isOptional. (86ab252)
• [ObjC] Raise the library version and enable new generated code. (a639cf8)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)

Rust

• Add upb_Map_GetMutable API to upb (dd5bf5e)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)
• See also UPB changes below, which may affect Rust.

Python

• Update GetCurrentTime to use datetime.datetime.now (01b154c)
• Make Py JSON float_precision apply to both float and double fields. (5b54ee3)
• -Add '+' and '-' annotations for Timestamp and Duration in Python (fff783e)
• Bug fix for FieldMask.MergeFrom() with unset fields. (1c87ac3)
• Make python text_format able to skip unknown fields for repeated messages (dcafca2)
• Fix segment fault for UPB Pyhon 'in' method of empty repeated extensions (da04261)
• Fix upb to escape DefinitelyNeedsEscape (like " and ') for bytes field (b234305)
• Check with fallback descriptorDB for FindExtensionByNumber()/FindAllExtensions in UPB python pool. (9fd28d9)
• Add clear() method to repeated fields in Python. (0324f39)
• Register Scalar/MessageMapContainerTypes as virtual subclasses of (9a0b591)
• Fix python codegen crash when C++ features are used. (308aaf4)
• Add more detail to the comment for GetMessageClassesForFiles (9befb58)
• Add constructing unpack routine to Python Protobuf Any API. (fb78c09)
• Implement typing for proto Timestamp/Duration assignments. (0e3326b)
• Upgrade abseil-cpp to 20250127 and use @com_google_absl -> @abseil-cpp and com_google_googletest -> @googletest canonical BCR names. (ba6b54d)

PHP

• Deprecate Descriptor Label. As an alternative, add helper methods for checking whether a field is required or repeated. (d82de8f)
• Feat(php): improve return typehint when ...

Protocol Buffers v30.2

Announcements

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

Compiler

• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)

C++

• Remove dllexport attribute on variable definition. (#20833) (7831669)
• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)
• Change how we decide which empty string implementation to use. (#20708) (221b2a0)

Java

• Remove dllexport attribute on variable definition. (#20833) (7831669)
• Add protobuf_maven artifacts to protobuf_maven_dev as well so they can still be referenced correctly using the dev namespace for dev-only targets. (#20771) (09b5078)
• Add volatile to featuresResolved (#20766) (b7f06f1)
• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)
• Restore custom protobuf maven namespaces to avoid polluting main maven namespace for non-dev dependencies as well. (#20739) (f4b0a79)
• Fix Java concurrency issue in feature resolution for old <=3.25.x gencode using lazy feature resolution. (#20751) (2dc9f35)
• Fix lite classes in the protobuf-java Maven release to be JDK8 compatible. (#20843) (7a4c63b)

Kotlin

• Restore custom protobuf maven namespaces to avoid polluting main maven namespace for non-dev dependencies as well. (#20739) (f4b0a79)

Csharp

• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)

Objective-C

• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)

Python

• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)

Ruby

• Restore generator headers in cmake install until the next breaking C++ release (#20749) (b69f653)

Other

• Restore JDK8 compatibility in Bazel for libraries with dependencies from Maven (e.g. //java/util) (#20832) (da9cadc)

Protocol Buffers v29.4

Announcements

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

Java

• Fix Java concurrency issue in feature resolution for old <=3.25.x gencode using lazy feature resolution. (#20750) (ce59907)