Announcements

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

C++

• Introduce FieldDescriptor::cpp_string_type() API to replace direct ctype inspection which will be removed in the next breaking change (https://github.com/protocolbuffers/protobuf/commit/72b0b7afbabce7494c2605aa240b0f0ca98aa6e5)

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. (https://github.com/protocolbuffers/protobuf/commit/6bf01c51a0b92278958f0169d330d64a08dbb4ec)

Objective-C

• [ObjC] Add api to add a field to another collection of unknown fields. (https://github.com/protocolbuffers/protobuf/commit/0790ab4d7a771d4ca79fa795cc96febfbb43ebb6)
• [ObjC] Fix GPBUnknownField/GPBUnknownFields copy. (https://github.com/protocolbuffers/protobuf/commit/b3b988885d91f31c9cdc058fd5249efc18a91d11)
• [ObjC] Raise an exception for a nil message. (https://github.com/protocolbuffers/protobuf/commit/35bd2be8286c736303083d7c2230d11ab3648672)
• [ObjC] Deprecate GPBUnknownFieldSet and related apis. (https://github.com/protocolbuffers/protobuf/commit/9f6ee72443312821874e1e0ed532014ddbf91f4f)
• [ObjC] More tests around unknown to known failure cases. (https://github.com/protocolbuffers/protobuf/commit/e822dce56d2ee8caee08897520aaae5d48bb1fea)

Rust

• Add visibility for rust public aliases for '@protobuf//:protobuf_rust' (https://github.com/protocolbuffers/protobuf/commit/2cee1424616bd5c2a4fdc792722edb91e5bfea21)

Python

• Raise warnings for deprecated python cpp extension GetDebugString(). (https://github.com/protocolbuffers/protobuf/commit/5fc5558f6e2a213a1e4160585d762bfe749d63ea)

Other

• Remove protobuf rust from BCR presubmits for now. (https://github.com/protocolbuffers/protobuf/commit/92552d37b733e0721ad35ec5ab552e2caa623ab2)