v28.3: Protocol Buffers v28.3

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Announcements

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

C++

• Fix packed reflection handling bug in edition 2023. (#​18405) (protocolbuffers/protobuf@c4124f9)

Java

• Mute the minor version warning https://github.com/protocolbuffers/protobuf/issues/18096 (#​18923) (protocolbuffers/protobuf@fe30f9a)
• Populate Kotlin Manifest Files (#​18859) (protocolbuffers/protobuf@d82fb47)
• Re-export includingDefaultValueFields in deprecated state for important Cloud customer. (protocolbuffers/protobuf@3b62d78)
• Cherrypick restoration of mutableCopy helpers (protocolbuffers/protobuf@3ea568a)
• Fix packed reflection handling bug in edition 2023. (#​18405) (protocolbuffers/protobuf@c4124f9)

Kotlin

• Populate Kotlin Manifest Files (#​18859) (protocolbuffers/protobuf@d82fb47)

Python

• Mute the minor version warning https://github.com/protocolbuffers/protobuf/issues/18096 (#​18923) (protocolbuffers/protobuf@fe30f9a)
• Fix packed reflection handling bug in edition 2023. (#​18405) (protocolbuffers/protobuf@c4124f9)

Other

• Fix merge conflicts (protocolbuffers/protobuf@664a7e1)
• [ObjC] Disabling visionOS on CI. (protocolbuffers/protobuf@22cd8ba)
• Update staleness tests to only run over release branch (#​18398) (protocolbuffers/protobuf@8e94b14)

v28.2: Protocol Buffers v28.2

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Announcements

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

C++

• Fix cord handling in DynamicMessage and oneofs. (#​18373) (protocolbuffers/protobuf@5b0e543)

Java

• Add recursion check when parsing unknown fields in Java. (protocolbuffers/protobuf@ac9fb5b)

v28.1: Protocol Buffers v28.1

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Announcements

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

C++

• Fix compiler error with StrongReferenceToType() (protocolbuffers/protobuf@8ea3bb1)

PHP

PHP C-Extension

• Upb: fix uninitialized upb_MessageValue buffer bugs (#​18160) (protocolbuffers/protobuf@9deedf0)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

Ruby C-Extension

• Fix a potential Ruby-upb use of uninitialized memory. (protocolbuffers/protobuf@70b77de)
• Upb: fix uninitialized upb_MessageValue buffer bugs (#​18160) (protocolbuffers/protobuf@9deedf0)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Fix a potential Ruby-upb use of uninitialized memory. (protocolbuffers/protobuf@70b77de)
• Upb: fix uninitialized upb_MessageValue buffer bugs (#​18160) (protocolbuffers/protobuf@9deedf0)

v28.0: Protocol Buffers v28.0

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Announcements

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

Compiler

• UPB text encoder without using reflection for Rust (used for a message's Debug trait) that will print out field number to value entries instead of field name to value entries of a message like how it's expected for the usual text format using reflection. (protocolbuffers/protobuf@f9dd9ce)
• Enable MessageLite::DebugString to use Message::DebugString where possible. (protocolbuffers/protobuf@f810cc5)
• Always report plugin support errors from protoc. (protocolbuffers/protobuf@986ef8d)
• Stop supporting EDITION_PROTO2 as an alias for EDITION_LEGACY. (protocolbuffers/protobuf@35b3425)
• Rename DynamicCastToGenerated/DownCastToGenerated to (protocolbuffers/protobuf@18da465)
• Mark deleted fields in descriptor.proto reserved (protocolbuffers/protobuf@44c409d)
• Protoc: support inf, -inf, nan, and -nan in option values (#​15017) (protocolbuffers/protobuf@3c03e93)

C++

• Move -Werror to our test/dev bazelrc files. (#​17938) (protocolbuffers/protobuf@f5a1b17)
• Introduce FieldDescriptor::cpp_string_type() API to replace direct ctype inspection which will be removed in the next breaking change (protocolbuffers/protobuf@72b0b7a)
• Removed specific MSVC settings when installing (#​17285) (protocolbuffers/protobuf@770090e)
• Omit the _raw_default_instance_ declaration when using DLL linkage. (protocolbuffers/protobuf@79c55cb)
• Enable MessageLite::DebugString to use Message::DebugString where possible. (protocolbuffers/protobuf@f810cc5)
• Fix a bug in which proto code uses ctype instead of string_type internally. (protocolbuffers/protobuf@dfbe987)
• Add an optimization that prevents an exponential number of comparisons on deeply (protocolbuffers/protobuf@594a71f)
• Replace FindHelper() with BucketNumber() when only the bucket number is required. (protocolbuffers/protobuf@8c7b1ec)
• Stop supporting EDITION_PROTO2 as an alias for EDITION_LEGACY. (protocolbuffers/protobuf@35b3425)
• Rename DynamicCastToGenerated/DownCastToGenerated to (protocolbuffers/protobuf@18da465)
• Prohibit using features in the same file they're defined in. (protocolbuffers/protobuf@24b91a7)
• Implement new Debug API with redaction. (protocolbuffers/protobuf@bb68eb2)
• Use bool HasHasbits(const FieldDescriptor*) instead of manual checks. (protocolbuffers/protobuf@448e326)
• Add java to reserved names to escape extensions to java_. This may break existing references to gencode for extensions named java. (protocolbuffers/protobuf@c99cf4b)
• Put arena cleanup nodes on a separate chunked list instead of at the ends of arena blocks. (protocolbuffers/protobuf@f70d90b)
• Fix validation checks of implicit presence. (protocolbuffers/protobuf@d6c2833)
• Clarify map behaviors in editions. (protocolbuffers/protobuf@0dbd99a)
• Protoc: support inf, -inf, nan, and -nan in option values (#​15017) (protocolbuffers/protobuf@3c03e93)

Java

• Binary compatibility shims for GeneratedMessageV3, SingleFieldBuilderV3, RepeatedFieldBuilderV3, and their nested classes to restore binary compatibility with <=v3.x.x generated code built against v3.x.x prior to v4.26.0 breaking release. (protocolbuffers/protobuf@6bf01c5)
• Remove unused pom.xml files. (protocolbuffers/protobuf@aaf5f79)
• Add overload for LazyStringArrayList.add(String): boolean (protocolbuffers/protobuf@761d49a)
• Hoist SmallSortedMap.getNumArrayEntries() outside loops over array entries (protocolbuffers/protobuf@229c958)
• Omit the _raw_default_instance_ declaration when using DLL linkage. (protocolbuffers/protobuf@79c55cb)
• Java: Deprecate newExtensionWriter. (protocolbuffers/protobuf@7122ba1)
• Immutable java: Use new lower-allocation extension serialization APIs from gencode (protocolbuffers/protobuf@4151486)
• Reserialize all unresolved features using java features from the generated pool in case of descriptors from the custom pool. (protocolbuffers/protobuf@415a147)
• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@8beb970)
• Full java runtime: Avoid allocating ArrayList iterators when serializing UnknownFieldSet (protocolbuffers/protobuf@fac847c)
• Move back deprecation of java utf8 feature to 2024. (protocolbuffers/protobuf@bd7078d)
• Reparse unknown features using extension registry containing Java features. (protocolbuffers/protobuf@68d9087)
• Remove field SmallSortedMap.maxArraySize (protocolbuffers/protobuf@16e0a63)
• Delete unused method SmallSortedSet.getOverflowEntriesDescending (protocolbuffers/protobuf@c05be32)
• Avoid allocating FieldSet iterator if FieldSet is empty (protocolbuffers/protobuf@3ba7280)
• Lazily resolve features for proto2 and proto3 for compatibility with old open source gencode that does not invoke feature resolution from gencode static init. (protocolbuffers/protobuf@11c27df)
• Implement new Debug API with redaction. (protocolbuffers/protobuf@bb68eb2)
• Replace SmallSortedMap.EmptySet with equivalent Collections.emptySet() (protocolbuffers/protobuf@c6e2778)
• Add java to reserved names to escape extensions to java_. This may break existing references to gencode for extensions named java. (protocolbuffers/protobuf@c99cf4b)
• Avoid allocating TreeMap in UnknownFieldSet.Builder.asMap (protocolbuffers/protobuf@4b7c2d4)
• Avoid allocating iterator in TextFormat printing UnknownFieldSet (protocolbuffers/protobuf@8c6e5b7)
• Add null to the list of reserved words. (protocolbuffers/protobuf@510c143)
• Add UnknownFieldSet.isEmpty (protocolbuffers/protobuf@c56bddd)
• Java full runtime: Avoid allocating when calling asMap on empty UnknownFieldSet (protocolbuffers/protobuf@d0b016f)
• Return the default instance when parsing from an empty byte[]. (protocolbuffers/protobuf@f597991)
• Deprecate building from source with Maven to be removed in 4.28.x. (protocolbuffers/protobuf@4c8da99)
• Java full runtime: Avoid allocating iterator if UnknownFieldSet's TreeMap is empty (protocolbuffers/protobuf@4f12891)
• Proto java full runtime: avoid allocating Integers accessing enum lists (protocolbuffers/protobuf@cc79f77)
• Split bootstrapped java_features.proto to keep it from leaking out. (protocolbuffers/protobuf@2257232)
• Java Proto lite: avoid boxing Integers accessing enum lists (protocolbuffers/protobuf@fb054c8)
• In the Kotlin DSL, reference builder methods with property syntax. (protocolbuffers/protobuf@e9c9970)
• Java Proto Lite: Serialize repeated enums without allocating (protocolbuffers/protobuf@de6aba9)
• Avoid boxing when serializing primitive lists in CodedOutputStreamWriter (protocolbuffers/protobuf@eaee04d)

Kotlin

• Remove unused pom.xml files. (protocolbuffers/protobuf@aaf5f79)
• In the Kotlin DSL, reference builder methods with property syntax. (protocolbuffers/protobuf@e9c9970)

Csharp

• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@8beb970)
• Handle groups in C# JsonParser (#​16970) (protocolbuffers/protobuf@092cc15)
• Introduce MessageDescriptor.IsMapType in C# reflection to make it easier to tell whether a given message was generated by protoc for a map field. (protocolbuffers/protobuf@047fc76)
• C#: Fix discovery of oneof declarations in descriptor protos. (protocolbuffers/protobuf@b50ff60)

Objective-C

• [ObjC] Issue stderr warnings for deprecated generation options. (protocolbuffers/protobuf@b276420)
• [ObjC] Add api to add a field to another collection of unknown fields. (protocolbuffers/protobuf@0790ab4)
• [ObjC] Fix GPBUnknownField/GPBUnknownFields copy. (protocolbuffers/protobuf@b3b9888)
• [ObjC] Raise an exception for a nil message. (protocolbuffers/protobuf@35bd2be)
• [ObjC] Deprecate GPBUnknownFieldSet and related apis. (protocolbuffers/protobuf@9f6ee72)
• [ObjC] More tests around unknown to known failure cases. (protocolbuffers/protobuf@e822dce)
• [ObjC] Support errors when merging unknown fields to a message. (protocolbuffers/protobuf@c46340e)
• [ObjC] Add apis for removing things from GPBUnknownFields. (protocolbuffers/protobuf@c5c9c89)
• [ObjC] Collect unknown fields as data (protocolbuffers/protobuf@a6b3535)
• [ObjC] Internal helper for getting the unknown field data from a message (protocolbuffers/protobuf@bf2d4e7)
• [ObjC] Update tests to use both unknown fields apis. (protocolbuffers/protobuf@0832b52)
• [ObjC] Deprecate GPBTextFormatForUnknownFieldSet(). (protocolbuffers/protobuf@d1b6f8c)
• [ObjC] Parsing helper and tests around unknown fields. (protocolbuffers/protobuf@9b16ee4)
• [ObjC] Add test around enum unknown values. (protocolbuffers/protobuf@fad7b78)
• [ObjC] Expose a helper for stream error. (protocolbuffers/protobuf@cf7abf6)
• [ObjC] Support MessageSet with GPBUnknownFields. (protocolbuffers/protobuf@ddf9b76)
• [ObjC] Update MessageSet Parsing. (protocolbuffers/protobuf@5fa8cd9)
• [ObjC] Validate MessageSet expectations. (protocolbuffers/protobuf@3aa491c)
• [ObjC] Improve parsing validations (protocolbuffers/protobuf@ef4898f)
• [ObjC] Add Swift helpers for GPBUnknownFields/GPBUnknownField. (protocolbuffers/protobuf@6750ed8)
• [ObjC] Introduce the new GPBUnknownFields type. (protocolbuffers/protobuf@47f633e)
• Rename DynamicCastToGenerated/DownCastToGenerated to (protocolbuffers/protobuf@18da465)

Rust

• Move -Werror to our test/dev bazelrc files. (#​17938) (protocolbuffers/protobuf@f5a1b17)
• Add visibility for rust public aliases for '@​protobuf//:protobuf_rust' (protocolbuffers/protobuf@2cee142)
• UPB text encoder without using reflection for Rust (used for a message's Debug trait) that will print out field number to value entries instead of field name to value entries of a message like how it's expected for the usual text format using reflection. (protocolbuffers/protobuf@f9dd9ce)
• Enable MessageLite::DebugString to use Message::DebugString where possible. (protocolbuffers/protobuf@f810cc5)
• See also UPB changes below, which may affect Rust.

Python

• Raise warnings for deprecated python cpp extension GetDebugString(). (protocolbuffers/protobuf@5fc5558)
• Remove service.py usages in builder (protocolbuffers/protobuf@902a68a)
• Raise warnings for deprecated google/protobuf/reflection.py APIs. (protocolbuffers/protobuf@38140ac)
• Nextgen Proto Pythonic API: Struct/ListValue assignment and creation (protocolbuffers/protobuf@e17821c)
• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@8beb970)
• Make bytearray work (again) (#​16691) (protocolbuffers/protobuf@eb67a91)
• Nextgen Proto Pythonic API: Timestamp/Duration assignment, creation and calculation (protocolbuffers/protobuf@b690e72)
• Update rules_python to 0.28.0 (protocolbuffers/protobuf@e1bf1f0)
• Nextgen Proto Pythonic API: “Add-on” proto for length prefixed serialize/parse (protocolbuffers/protobuf@3a9f074)
• Rename DynamicCastToGenerated/DownCastToGenerated to (protocolbuffers/protobuf@18da465)
• Fixed printing of nan floats/doubles in Python. (protocolbuffers/protobuf@f651080)
• Nextgen Proto Pythonic API: “Add-on” proto for JSON serialize/parse (protocolbuffers/protobuf@6c91de9)
• Nextgen Proto Pythonic API: “Add-on” proto for serialize/parse (protocolbuffers/protobuf@495ba7b)
• Use struct instead of ctype. allows the protobuf python library to work on cpython 3.11's new wasm target [1] (protocolbuffers/protobuf@9de810a)
• Nextgen Proto Pythonic API: Add 'in' operator (protocolbuffers/protobuf@24f27c3)
• Automated rollback of commit f799af8. (protocolbuffers/protobuf@c4bf83b)
• Catch all the exceptions in python JSON ParseDict and raise (protocolbuffers/protobuf@9cc5be1)

PHP

• Chore(php): conformance testing for edition (#​16712) (protocolbuffers/protobuf@01744cc)

PHP C-Extension

• Fix segmentation faults with enabled keep_descriptor_pool_after_request (#​16993) (protocolbuffers/protobuf@e844510)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• [Ruby] Warn if assigning a "UTF-8" string with invalid UTF-8. (#​17253) (protocolbuffers/protobuf@fe9a53c)
• Remove Arena_pin in favor of adopting the UPB freezing API. (protocolbuffers/protobuf@1194440)
• Fix Ruby FFI to pass MiniTable to upb_Message_New() aka new_message_from_def(). (protocolbuffers/protobuf@47f4bc9)

Ruby C-Extension

• Move -Werror to our test/dev bazelrc files. (#​17938) (protocolbuffers/protobuf@f5a1b17)
• [Ruby] Warn if assigning a "UTF-8" string with invalid UTF-8. (#​17253) (protocolbuffers/protobuf@fe9a53c)
• [Ruby] Fix mismatched pointer type (#​17240) (protocolbuffers/protobuf@0aa7449)
• Remove Arena_pin in favor of adopting the UPB freezing API. (protocolbuffers/protobuf@1194440)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Move -Werror to our test/dev bazelrc files. (#​17938) (protocolbuffers/protobuf@f5a1b17)
• UPB text encoder without using reflection for Rust (used for a message's Debug trait) that will print out field number to value entries instead of field name to value entries of a message like how it's expected for the usual text format using reflection. (protocolbuffers/protobuf@f9dd9ce)
• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@8beb970)
• Fixed printing of nan floats/doubles in Python. (protocolbuffers/protobuf@f651080)

Other

• Remove --copt="-Werror" from .bazelrc (#​18005) (protocolbuffers/protobuf@c9454f4)
• Remove protobuf rust from BCR presubmits for now. (protocolbuffers/protobuf@92552d3)
• Set -ex in test_java.yml (protocolbuffers/protobuf@6a7e215)
• Refactor java maven GHA test to use our generated jars. (protocolbuffers/protobuf@671ef8b)
• Remove /utf-8 flag added in #​14197 (protocolbuffers/protobuf@440dc83)
• Downgrade CMake to 3.29 to workaround Abseil issue. (protocolbuffers/protobuf@cd75dd5)
• Add minimal Python support to MODULE.bazel (protocolbuffers/protobuf@2eb4d69)
• Fix(bazel/python): incompatible_enable_proto_toolchain_resolution (#​17078) (protocolbuffers/protobuf@8434c12)
• Add Rust support to MODULE.bazel (protocolbuffers/protobuf@f3c140f)
• Add rules_fuzzing dependency to MODULE.bazel. (protocolbuffers/protobuf@a450c9c)
• Reenable FFI tests on CRuby. (protocolbuffers/protobuf@e595749)
• Update comment for message_type (protocolbuffers/protobuf@023e69d)
• Enable textproto conformance tests for "-0" and "-0F". (protocolbuffers/protobuf@13caa08)
• Fix #​10007: Propagate msvc-style link flags to clang-cl with Bazel (protocolbuffers/protobuf@55592a2)
• Add system_python to protobuf_deps.bzl. (protocolbuffers/protobuf@8a11178)

v27.5: Protocol Buffers v27.5

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Announcements

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

C++

• Fix cord handling in DynamicMessage and oneofs. (#​18374) (protocolbuffers/protobuf@6fa3f2d)

Java

• Add recursion check when parsing unknown fields in Java. (#​18388)
  https://github.com/protocolbuffers/protobuf/pull/183888388/commits/8bfa80b5422cc22d64bfba5aa3049b9d5143c99b)

Other

• Remove --copt="-Werror" from .bazelrc (#​18392) (protocolbuffers/protobuf@6481fec)

v27.4: Protocol Buffers v27.4

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Announcements

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

Java

• Binary compatibility shims for GeneratedMessageV3, SingleFieldBuilderV3, RepeatedFieldBuilderV3, and their nested classes to restore binary compatibility with <=v3.x.x generated code built against v3.x.x prior to v4.26.0 breaking release. (protocolbuffers/protobuf@8dd83da)

v27.3: Protocol Buffers v27.3

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Announcements

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

Compiler

• Revert workaround for std::mutex issues on github windows runners. (protocolbuffers/protobuf@ba3e7d7)

C++

• Update staleness (protocolbuffers/protobuf@b7ef2ca)
• Omit the _raw_default_instance_ declaration when using DLL linkage. (protocolbuffers/protobuf@22d9a03)
• Refactor the way we turn on the optimization in StrongPointer. (protocolbuffers/protobuf@a15c9c5)

Java

• Omit the _raw_default_instance_ declaration when using DLL linkage. (protocolbuffers/protobuf@22d9a03)

PHP

PHP C-Extension

• Fix segmentation faults with enabled keep_descriptor_pool_after_request (#​16993) (protocolbuffers/protobuf@ca3b732)

Ruby

Ruby C-Extension

• [Ruby] Fix mismatched pointer type (#​17240) (protocolbuffers/protobuf@a1d4777)

Other

• Remove /utf-8 flag added in #​14197 (protocolbuffers/protobuf@e20cb7a)
• Downgrade CMake to 3.29 to workaround Abseil issue. (protocolbuffers/protobuf@8a579c1)
• Upgrade macos-11 tests to macos-12 (protocolbuffers/protobuf@aec8a76)
• Use explicit names of our large runners (protocolbuffers/protobuf@4e3b4f0)
• Upgrade our C++ release tests to large runners. (protocolbuffers/protobuf@fa2b2d6)

v27.2: Protocol Buffers v27.2

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Announcements

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

Compiler

• Avoid calling absl::InitializeLog in protoc with MSVC (protocolbuffers/protobuf@aa7fcb3)

C++

• Fix string_type bugs in edition 2023 (#​17211) (protocolbuffers/protobuf@4923b8d)
• Add simple conformance test that builds the old gencode against the current runtime. (protocolbuffers/protobuf@9cfb59b)
• Make the underlying type of the enum by 8-bits instead of using bitfields for (protocolbuffers/protobuf@316f493)

Java

• Cleanup imports and comments in V3 stubs. (protocolbuffers/protobuf@270ca66)
• Add stubs for GeneratedMessageV3, RepeatedFieldBuilderV3, SingleFieldBuilderV3 for compatibility with older <4.26.x gencode. (protocolbuffers/protobuf@1e360a4)
• Fix checking unknown field set empty which wasn't exposed yet in 27.x (protocolbuffers/protobuf@c7a006a)
• Reserialize all unresolved features using java features from the generated pool in case of descriptors from the custom pool. (protocolbuffers/protobuf@2426a02)
• Reparse unknown features using extension registry containing Java features. (protocolbuffers/protobuf@e5ddc45)
• Fix data race in crosslink. (protocolbuffers/protobuf@3d71e22)
• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@c4f359e)

Csharp

• Regenerate stale files (protocolbuffers/protobuf@29f1b52)
• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@c4f359e)

Python

• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@c4f359e)

PHP

PHP C-Extension

• Regenerate stale files (protocolbuffers/protobuf@29f1b52)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

Ruby C-Extension

• Regenerate stale files (protocolbuffers/protobuf@29f1b52)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Fix delimited inheritance in all languages. (protocolbuffers/protobuf@c4f359e)

Other

• Port windows bootstrapping fix (#​17225) (protocolbuffers/protobuf@19bd211)

v27.1: Protocol Buffers v27.1

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Announcements

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

Compiler

• Always report plugin support errors from protoc. (protocolbuffers/protobuf@9a37881)

C++

• Fix a bug in edition defaults calculation. (protocolbuffers/protobuf@887e95d)

Java

• Move back deprecation of java utf8 feature to 2024. (protocolbuffers/protobuf@8ffc1d0)

Csharp

• Handle groups in C# JsonParser (#​16970) (protocolbuffers/protobuf@0e9dd4c)

Other

• Avoid ODR violations from bootstrapped protos (protocolbuffers/protobuf@f61d89c)

v27.0: Protocol Buffers v27.0

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Announcements

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

Compiler

• Future-proof edition 2023 against feature value support windows. (protocolbuffers/protobuf@fea6847)
• Mark deleted fields in descriptor.proto reserved (protocolbuffers/protobuf@d2da463)
• Add extension declarations for known features. (protocolbuffers/protobuf@f8d0a5b)
• Refactored the Java generator into separate packages and targets. (protocolbuffers/protobuf@bd81fd9)
• Officially release Editions in 27.0. (protocolbuffers/protobuf@baa83b6)
• Define lifetimes of edition 2023 features (protocolbuffers/protobuf@77f62de)
• Implement feature lifetime validation in protoc and the C++ runtime. (protocolbuffers/protobuf@b3b4497)
• Add edition lifetime options for feature specs. (protocolbuffers/protobuf@b09b3e4)
• Enable editions support for Java Lite. (protocolbuffers/protobuf@500c953)
• Release edition defaults CLI arguments. (protocolbuffers/protobuf@7a0e10e)
• Update protoc release to include editions language features protos for Java and C++ (protocolbuffers/protobuf@6483c47)

C++

• Future-proof edition 2023 against feature value support windows. (protocolbuffers/protobuf@fea6847)
• Prohibit using features in the same file they're defined in. (protocolbuffers/protobuf@8c5f3a7)
• Fix validation checks of implicit presence. (protocolbuffers/protobuf@bdf6b10)
• Clarify map behaviors in editions. (protocolbuffers/protobuf@61c9187)
• Ensure we allocate overaligned types with aligned operator new. (protocolbuffers/protobuf@11ef0ff)
• Fix text-format delimited field handling.(protocolbuffers/protobuf@29c69ff)
• In debug mode, after clearing oneof messages on arenas, poison them if ASAN. (protocolbuffers/protobuf@8826baf)
• Allow string_type for Edition 2023. (protocolbuffers/protobuf@d8251eb)
• Breaking change: Ensure we allocate overaligned types with aligned operator new. (protocolbuffers/protobuf@11ef0ff)
• Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set (#​15887) (protocolbuffers/protobuf@86abf35)
• Move java_features.proto to java/core/srce/main/resources (protocolbuffers/protobuf@274bc7f)
• Add an RAII namespace printer helper for C++ codegen. (protocolbuffers/protobuf@8599ab5)
• Enable editions support for Java Lite. (protocolbuffers/protobuf@500c953)
• Add an RAII ifndef helper for C++ codegen. (protocolbuffers/protobuf@1087274)
• Clear oneof message fields even on arena on non-OPT builds. (protocolbuffers/protobuf@5c183bd)
• Implement edition 2023 support in all Ruby runtimes. (protocolbuffers/protobuf@bca8fb6)
• Release edition defaults CLI arguments. (protocolbuffers/protobuf@7a0e10e)
• Deprecate Arena::CreateMessage for OSS. (protocolbuffers/protobuf@d4bfe52)
• Open sourcing reflection_visit_fieds. (protocolbuffers/protobuf@cfc07df)
• Fixed the use of c++ keywords within namespace names (#​15954) (protocolbuffers/protobuf@988194a)
• Fix pkg-config metadata for shared abseil on windows (#​15888) (protocolbuffers/protobuf@fe6edca)
• Add GetStringView() and GetRepeatedStringView() with scratch. (protocolbuffers/protobuf@a3f5af0)
• Avoid a 'may be used uninitialized' warning when built with '-c opt'. (#​15846) (protocolbuffers/protobuf@eb70b34)
• Add software prefetch to ByteSizeLong (protocolbuffers/protobuf@948ca2e)
• Add prefetching in arena blocks. (protocolbuffers/protobuf@9e57b8e)
• Rename the includingDefaultValueWithoutPresenceFields and always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the C++, Py and Java JSON serializers for consistency. (protocolbuffers/protobuf@7d43131)
• Remove tags for arena cleanup nodes now that we have dedicated string cleanup blocks. (protocolbuffers/protobuf@202b106)
• Avoid unused-parameter warning in field accessor listeners. (protocolbuffers/protobuf@f4d5c2c)
• Add new always_print_without_presence_fields option to the C++ JSON serializer. (protocolbuffers/protobuf@671b61b)
• Fail to build descriptor if ctype is specified for non string/bytes fields (protocolbuffers/protobuf@8b4c7a1)
• Check ctype() in DescriptorBuilder for edition 2023 and beyond. (protocolbuffers/protobuf@307aeac)
• Fail building descriptors if ctype is used for fields other than string or bytes. (protocolbuffers/protobuf@403e207)
• Fix generation of HasExtension and ExtensionSize functions to restrict to the (protocolbuffers/protobuf@9f5be07)
• Add the privacy manifest to the C++ CocoaPod. (protocolbuffers/protobuf@982ea24)

Java

• Lazily resolve features for proto2 and proto3 for compatibility with old open source gencode that does not invoke feature resolution from gencode static init. (#​16907) (protocolbuffers/protobuf@4483c6b)
• Add java to reserved names to escape extensions to java_. This may break existing references to gencode for extensions named java. (protocolbuffers/protobuf@c18cb95)
• Deprecate building from source with Maven to be removed in 4.28.x. (protocolbuffers/protobuf@51b48a4)
• Split bootstrapped java_features.proto to keep it from leaking out. (protocolbuffers/protobuf@d56cb7d)
• Refactored the Java generator into separate packages and targets. (protocolbuffers/protobuf@bd81fd9)
• Define lifetimes of edition 2023 features (protocolbuffers/protobuf@77f62de)
• Check that size is non-negative when reading string or bytes in StreamDecoder. (protocolbuffers/protobuf@a94f57b)
• Fix text-format delimited field handling (protocolbuffers/protobuf@29c69ff)
• Move java_features.proto to java/core/srce/main/resources (protocolbuffers/protobuf@274bc7f)
• Add java_features.proto to kotlin_mvn release (protocolbuffers/protobuf@369732a)
• Enable editions support for Java Lite. (protocolbuffers/protobuf@500c953)
• Fix descriptor to access type via getType() s.t. messages using delimited encoding are consistently treated as groups for Java lite. (protocolbuffers/protobuf@9f001a9)
• Make UnsafeByteOperations stable; removing experimental annotation. (protocolbuffers/protobuf@0070ac1)
• Fix features inheritance of oneof fields and extensions and fix/move unit tests to actually run. (protocolbuffers/protobuf@eb10ebd)
• Add software prefetch to ByteSizeLong (protocolbuffers/protobuf@948ca2e)
• Rename the includingDefaultValueWithoutPresenceFields and always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the C++, Py and Java JSON serializers for consistency. (protocolbuffers/protobuf@7d43131)
• Add a new includingDefaultValueWithoutPresenceFields option to the Java parser which is intended to replace the current includingDefaultValueFields. (protocolbuffers/protobuf@58baeb4)

Kotlin

• Add java_features.proto to kotlin_mvn release (protocolbuffers/protobuf@369732a)

Csharp

• Regenerate stale files (protocolbuffers/protobuf@c3417f5)
• Optimize JSON parsing in JsonTokenizer. (protocolbuffers/protobuf@68e6e3e)
• Avoid string concatenation when looking up enum values by name. (protocolbuffers/protobuf@e6684ac)
• Cache StringBuilder instances in the .NET JsonTextTokenizer. (protocolbuffers/protobuf@fac929d)
• Enable Editions in the C# generator. (protocolbuffers/protobuf@421040b)
• Runtime support for Protobuf Editions in C#. (protocolbuffers/protobuf@450022d)
• Tweak "group to property name" mapping for C#. Under editions, where fields using a delimited encoding have independent field names from type names, we want to use the specified field name. (protocolbuffers/protobuf@139ea4d)
• Ignore invalid enum string values in JSON, when invalid fields are being ignored. (protocolbuffers/protobuf@55e50ba)

Objective-C

• Optimize startup be reducing selector lookup. (protocolbuffers/protobuf@b375d01)
• Add the privacy manifest to the ObjC CocoaPod. (protocolbuffers/protobuf@0d91515)

Python

• Add temporary alias for system_python.bzl at previous location . (#​16787) (protocolbuffers/protobuf@ffd753f)
• Implement feature lifetime validation in protoc and the C++ runtime. (protocolbuffers/protobuf@b3b4497)
• Fix text-format delimited field handling (protocolbuffers/protobuf@29c69ff)
• Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set (#​15887) (protocolbuffers/protobuf@86abf35)
• Fix upb python: DO NOT create empty optional field after sorting empty repeated field (protocolbuffers/protobuf@7cf0238)
• Enable Protobuf Python version check. (protocolbuffers/protobuf@0442ed6)
• Register Scalar/MessageMapContainerTypes as virtual subclasses of MutableMapping instead of inheriting directly. (protocolbuffers/protobuf@5b32936)
• Rename the includingDefaultValueWithoutPresenceFields and always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the C++, Py and Java JSON serializers for consistency. (protocolbuffers/protobuf@7d43131)
• Add new including_default_value_without_presence_fields to Python JSON serializer. (protocolbuffers/protobuf@25c6d34)
• Adhere to PEP 8 (#​15127) (protocolbuffers/protobuf@21ab745)

PHP

• Don't break the trace (#​11311) (protocolbuffers/protobuf@d67f921)
• Fix inconsistent timestamp json encode/decode (#​12396) (protocolbuffers/protobuf@47e92cd)
• Feat: more readable phpdoc escaping (#​11208) (protocolbuffers/protobuf@f929439)

PHP C-Extension

• Regenerate stale files (protocolbuffers/protobuf@c3417f5)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Add bigdecimal to dependencies (#​16379) (protocolbuffers/protobuf@d810ef6)
• Implement service & method descriptor lookup in Ruby (#​15817) (protocolbuffers/protobuf@2082ee8)
• Implement edition 2023 support in all Ruby runtimes. (protocolbuffers/protobuf@bca8fb6)
• Ruby implement memsize functions for native types (#​10291) (protocolbuffers/protobuf@87cbddd)
• Moved ObjectCache into an internal module. (protocolbuffers/protobuf@f824f6d)
• [Ruby] Delegate difference, intersection, union from RepeatedField to Array (#​15652) (protocolbuffers/protobuf@11eab86)
• Move the RubyMessage.java JSON "include defaults" to use alwaysPrintFieldsWithNoPresence. (protocolbuffers/protobuf@4d23fa0)
• Increased the size of the error message buffer by 4x, to 511 bytes. (protocolbuffers/protobuf@32a6f7a)

Ruby C-Extension

• Regenerate stale files (protocolbuffers/protobuf@c3417f5)
• Implement service & method descriptor lookup in Ruby (#​15817) (protocolbuffers/protobuf@2082ee8)
• Implement edition 2023 support in all Ruby runtimes. (protocolbuffers/protobuf@bca8fb6)
• Ruby implement memsize functions for native types (#​10291) (protocolbuffers/protobuf@87cbddd)
• Moved ObjectCache into an internal module. (protocolbuffers/protobuf@f824f6d)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Regenerate stale files (protocolbuffers/protobuf@c3417f5)
• Setup upb installation with cmake. (protocolbuffers/protobuf@6898451)
• Fix text-format delimited field handling (protocolbuffers/protobuf@29c69ff)
• Print non-extension fields by field number order instead of .proto file order. (protocolbuffers/protobuf@8612d5e)
• Implement service & method descriptor lookup in Ruby (#​15817) (protocolbuffers/protobuf@2082ee8)
• Implement edition 2023 support in all Ruby runtimes. (protocolbuffers/protobuf@bca8fb6)
• Adds mutable extension accessors to the codegen for upb C for getting mutable extension messages. (https://github.com/proto