chore(deps): update protobuf to v34 (major)

[renovate-bot]

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Type	Update	Change
com_google_protobuf	http_archive	major	v29.3 → v34.0
protocolbuffers/protobuf		major	v29.3 → v34.0

---

Release Notes

protocolbuffers/protobuf (com_google_protobuf)

v34.0: Protocol Buffers v34.0

Compare Source

Announcements

• This version includes potential breaking changes with major version bump to: Objective-C, Python, PHP, C++. Bazel
  • [Objective-C] Remove -[GPBFieldDescriptor optional] (3414dc1)
  • [Objective-C] Fix nullability annotations on some GPB*Dictionary types. (ea67d6d)
  • [Objective-C] Remove generate_minimal_imports generation option warning (45b1297)
  • [Python] Raise errors in OSS when assign bool to int/enum field in Python Proto. (5b116fe)
  • [Python] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (c301c2c)
  • [Python] Remove deprecated FieldDescriptor.label (0a8ff55)
  • [Python] Remove float_format/double_format from python proto text_format (e4854a1)
  • [Python] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (b76faa9)
  • [Python] Raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) (00aaca1)
  • [Python] Remove float_precision from python proto json_format (f027f1f)
  • [PHP] Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead. (4208121)
  • [PHP] Remove deprecated PHP APIs (9c45014)
  • [PHP] Add PHP typehints for setters and remove redundant GPBUtil checks (aee03b7)
  • [PHP] support default values for editions/proto2 (b01099d)
  • [C++] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (c301c2c)
  • [C++] Add a debug check that the target of CopyFrom is not a descendant of the source. (7a75898)
  • [C++] Add [[nodiscard]] to many APIs. (a70115f)
  • [C++] Make generator headers private (3a2af35)
  • [C++] Remove deprecated FieldDescriptor::has_optional_keyword() in OSS. Use is_repeated() or has_presence() instead (68346ec)
  • [C++] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (b76faa9)
  • [C++] Remove deprecated FieldDescriptor::is_optional() in OSS. Use (!is_required() && !is_repeated()) instead (9dbc5d4)
  • [C++] Remove AddUnusedImportTrackFile() and ClearUnusedImportTrackFiles(). Remove PROTOBUF_FUTURE_RENAME_ADD_UNUSED_IMPORT (837a2cd)
  • [C++] Removes proto2::util::MessageDifferencer::AddIgnoreCriteria that takes a raw pointer as an argument in favor of the overload that takes a unique_ptr. Remove macro PROTOBUF_FUTURE_REMOVE_ADD_IGNORE_CRITERIA (b115358)
  • [C++] Make the arena-enabled constructors of RepeatedField, RepeatedPtrField, and Map private. (ef890c3)
  • [C++] All entity names have length limit (2afb0dc)
  • [Other] Remove deprecated flag for enabling MSVC support (97c979b)
  • [Bazel] Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (0a5c2f6)
  • [Bazel] Change @​protobuf//bazel/flags:prefer_prebuilt_proto flag to True. (84a30b5)
  • [Bazel] Only respect the Starlark versions of --proto_toolchain_for*(b5685c4)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Bazel

• Only respect the Starlark versions of --proto_toolchain_for*. This is a breaking change. (#​26090) (#​26091) (b5685c4)
• Breaking change: Change @​protobuf//bazel/flags:prefer_prebuilt_proto flag to True. (84a30b5)
• Dropped support for Bazel 7. (304c9ba)
• Don't check for native protobuf flags if the proto fragment doesn't exist. (#​25803) (5975f13)
• Fix the prefer_prebuilt_protoc alias to use the correct originally announced location (732ed49)
• Actually fix breaking change related to upb_proto_reflection_library (86d434b)
• Fix breaking change related to upb_c_proto_library and upb_proto_reflection_library (b0150c0)
• Add an alias to undo accidental unannounced breaking change (e71d379)
• Moved prebuilt-related Bazel files to standard locations. (cfe8991)
• Refactored and rearranged Bazel rules. (d7dd1e1)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Introduce Starlark versions of Protobuf flags. (d1f4b2f)
• Fix: cc_toolchain should prefer protoc when prebuilt flag is flipped. (#​25168) (8c857c3)
• Breaking change: Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (0a5c2f6)
• Feat(bazel): wire up prebuilt protoc toolchain (#​24115) (cc23698)
• Migrate proto_descriptor_set (#​23369) (8d4dfdd)

Compiler

• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Validate Feature Support on Custom Options (2985930)
• Ruby codegen: support generation of rbs files (#​15633) (6ebdf85)
• Avoid collision name problems between a message named Xyz and a direct sibling enum named XyzView (eba53e8)
• Generalizing and implementing ValidateFeatureSupport for both Options and Features during proto parsing (ed3c571)
• Fix a bug with custom features outside of the pb package. (872d3ce)
• Fix import option handling when include_imports isn't set. (9ef9e80)
• Fix a bug in STRICT check of namespaced enums to properly check for 'reserved 1 to max' (1229d4a)
• Prevent accidental stripping of debug_redact options via import option. (f58b098)

C++

• Regenerated files. (a9bbf7a)
• Dropped support for Bazel 7. (304c9ba)
• Remove direct dependency on rules_apple (#​25708) (e06c026)
• Fix broken field_mask_upb_proto and field_mask_upb_reflection_proto aliases (d808a97)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Validate Feature Support on Custom Options (2985930)
• Auto-generate files after PR #​25437 (8be64ea)
• Update rules_apple dependency to support rules_swift 3.x (#​25437) (c0e15f2)
• Fix UTF-8 Validation of string extensions in C++ (35ba5cf)
• Improve wire compatibility of TestAllTypes with TestAllExtensions. (08355bd)
• Add EnumerateEnumValues function. (397d5d9)
• Add conformance tests for utf8 validation. (e8923a8)
• Disable constinit on MSVC for static library builds (783da0a)
• Breaking change: Make generator headers private (3a2af35)
• Add bounds checking to ExtractSubrange. (5687acc)
• This CL starts failing on [unverified_lazy = true] on extensions, which have been (d2a42e7)
• Refine the conditions for the MSVC constinit workaround (38927bf)
• Add conformance test cases about handling of google.protobuf.Empty inside any Any in JSON. (0f3dd06)
• Remove PROTOBUF_CONSTEXPR to unconditionally use constexpr (7f431bb)
• Add bounds checking to DeleteSubrange, create new helper, RuntimeAssertInBoundsGE, and modify LogIndexOutOfBoundsAndAbort to customize the message being logged. (71cc97c)
• Breaking change: Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (c301c2c)
• Fix issue where BinaryToJson a Skip()'s failure on unknown fields was ignored instead of resulting in a parse failure. (2ec322e)
• Breaking change: Add [[nodiscard]] to many APIs. (a70115f)
• Abort on out of bounds accesses. (3acf23c)
• Fix JSON printing of Any of an empty message in C++Proto. (014f676)
• FieldMaskUtil::TrimMessage: Handle repeated messages. (0f109cb)
• Breaking change: Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (b76faa9)
• Generalizing and implementing ValidateFeatureSupport for both Options and Features during proto parsing (ed3c571)
• Breaking change: Remove deprecated FieldDescriptor::has_optional_keyword() in OSS. Use is_repeated() or has_presence() instead (68346ec)
• Test that all entity names have some limit, and that passing that limit will (2afb0dc)
• Breaking change: Remove deprecated FieldDescriptor::is_optional() in OSS. Use (!is_required() && !is_repeated()) instead (9dbc5d4)
• Breaking change: Remove AddUnusedImportTrackFile() and ClearUnusedImportTrackFiles(). Remove PROTOBUF_FUTURE_RENAME_ADD_UNUSED_IMPORT (837a2cd)
• Breaking change: Removes proto2::util::MessageDifferencer::AddIgnoreCriteria that takes a raw pointer as an argument in favor of the overload that takes a unique_ptr. Remove macro PROTOBUF_FUTURE_REMOVE_ADD_IGNORE_CRITERIA (b115358)
• Mark mutable repeated fields/maps as [[nodiscard]] (bc60e2e)
• Apply [[nodiscard]] to constant, non-message accessors. (46575f0)
• Add [[nodiscard]] to many const methods of Message/Reflection. (8c981b8)
• Fix a bug with custom features outside of the pb package. (872d3ce)
• Delete safe_boundary_check as this now supported via build flag, --//third_party/protobuf:bounds_check_mode. (3079d15)
• Add [[nodiscard]] to const message field accessors. (60f60d0)
• CMake: Stop building tests by default (related to #​20539) (#​24373) (88261aa)
• Optimize TcParser::RepeatedVarint (88efe88)
• Add nodiscard to has_/_size accessors. (40fe103)
• Enable removed arena pointers from all fields. (1f3fe2e)
• Fix a bug in STRICT check of namespaced enums to properly check for 'reserved 1 to max' (1229d4a)
• Breaking change: Add a debug check that the target of CopyFrom is not a descendant of the source. (7a75898)
• Breaking change: Make the arena-enabled constructors of RepeatedField, RepeatedPtrField, and Map private. (ef890c3)
• Update AddAlreadyReserved/AddNAlreadyReserved to use the runtime bounds checks. (b8e690a)
• Use __builtin_operator_new to faciliate compiler optimizations of these allocs. (4624d81)
• Add has_default_instance() to ImplicitWeakTypeHandler (818b8ef)
• Add a macro to make RepeatedField(Arena*) constructor private in a future release. (b39f10c)
• Use __builtin_operator_new to faciliate compiler optimizations of these allocs. (195da19)
• Change LogIndexOutOfBoundsAndAbort logging message. (bc0b635)

Java

• Dropped support for Bazel 7. (304c9ba)
• Optimize TextFormatEscaper to just return the String input if it didn't need any escaping. (e536204)
• Adding deprecation comment when isInitialized() accessor is deprecated (2732c60)
• Deprecating isInitialized() if there aren't required fields (2607595)
• Avoid skipping descriptors with option dependencies (1bc2c63)
• Remove PROTOBUF_CONSTEXPR to unconditionally use constexpr (7f431bb)
• Correctly apply JSON recursion limit when parsing an Any-of-Any. (33b16e8)
• Avoid potential exceptions on serialize in the face of malformed lazy extensions. (531c644)
• Remove unused canUseUnsafe() protected method from GeneratedMessage (1041d62)
• Apply [[nodiscard]] to constant, non-message accessors. (46575f0)
• Add check if sun.misc.Unsafe is present but throws on use, to use the preexisting no-Unsafe paths if it does. (3514901)
• Fix a bug with custom features outside of the pb package. (872d3ce)
• Expose NestedInFileClass naming helpers for Java immutable. (0c48552)
• Add nodiscard to has_/_size accessors. (40fe103)
• Remove defunct protected mergeFromAndMakeImmutableInternal method. This method was planned to be used by gencode but was never used in practice. (57770eb)
• Fix bugs in Java Large Enums that have aliased values, and improve performance of valueOf / forNumber. (57338e8)
• Remove unused test-only method Protobuf.registerSchemaOverride (8e623d1)
• Remove unused method com.google.protobuf.Protobuf.mergeFrom(T,Reader) (7b6be54)
• Remove unused method com.google.protobuf.Protobuf.makeImmutable (8fa15e9)
• Mark com.google.protobuf.Protobuf.registerSchema as private (db16bca)
• Remove "public" from methods in com.google.protobuf.Protobuf (f50c425)
• Remove unused method com.google.protobuf.Protobuf.getTotalSchemaSize() (dead64c)
• Fix large java enums not being honored on lite runtime. (ec3c8a7)

Csharp

• Regenerated files. (a9bbf7a)
• Fix: apply recursion limits when parsing JSON well-known types with deep arrays (c3ddacb)

Objective-C

• Adds support for 3 modes for proto extension generation: (0bc4192)
• Breaking change: Remove generate_minimal_imports generation option warning (45b1297)
• Emit hassers for oneofs in objectivec. (2aae07e)
• Breaking change: Fix nullability annotations on some GPB*Dictionary types. (ea67d6d)
• Breaking change: Remove -[GPBFieldDescriptor optional] (3414dc1)

Rust

• Rust protobuf: use crate name aliases to disambiguate generated dependencies (1f07ec6)
• Avoid collision name problems between a message named Xyz and a direct sibling enum named XyzView (eba53e8)
• Mark MessageMut trait as + Send (bc517b9)
• Protobuf-rust: adapt for rules_rust 0.67 (eb8d34e)
• Adapt for rules_rust 0.66.0. (adb1957)
• Expose protobuf::message_eq() free function on the Rust Protobuf runtime api. (cfa8f67)
• Protobuf-rust: pass DepVariantInfo's attributes explicitily (a42e64f)
• See also UPB changes below, which may affect Rust.

Python

• Updated release builds to use Bazel 8 and platforms. (5d4ad45)
• Add recursion guards for the following nested messages: (#​25807) (c52dcb4)
• Use the toolchain protoc by default in internal rules. (41ad19a)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Prevent crashes when creating objects during interpreter shutdown (46061cb)
• Drop Python 3.9 support (bbc9dd9)
• Breaking change: Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (c301c2c)
• Breaking change: Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (b76faa9)
• Support more chars in type URLs in the Python text-format parser. (4459a20)
• Breaking change: Raise errors in OSS when assign bool to int/enum field in Python Proto. (5b116fe)
• Breaking change: Remove float_format/double_format from python proto text_format (e4854a1)
• Two new functions in PyProto_API to manage DescriptorPools (59f2a6e)
• Breaking change: Remove deprecated FieldDescriptor.label (0a8ff55)
• Python Proto scalar repeated numpy binding. (1eb4e52)
• Python Proto Free Threading tests/experimental (b8bef14)
• Add Python 3.14 test coverage (8e35431)
• Put ABSL annotations back in descriptor (e2ddebe)
• Free threading compat - Only access interned_descriptors behind a mutex (13fe37f)
• Breaking change: Remove float_precision from python proto json_format (f027f1f)
• Breaking change: Raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) (00aaca1)
• Python: kwargs initialization would silently swallow some errors with repeated fields. (412d0a2)
• Fix Python cpp memory crash when MergeFrom Oneof. (26d08d5)

PHP

• Bump version dependencies on phpunit/phpunit to ">=11.5.0 <12.0.0" (4e82ce4)
• Feat(php): Add PHP typehints for setters and remove redundant GPBUtil checks (#​25296) (aee03b7)
• Raise minimum php version to 8.2.0. Drop tests for 8.1. (5d29dca)
• Feat(php): support default values for editions/proto2 (#​25161) (b01099d)
• Breaking change: Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead. (4208121)
• Automated rollback of commit 8f569de. (94fe944)
• Breaking change: Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead (cd76e67)
• Breaking change: Remove deprecated PHP APIs (9c45014)
• Make PHPDoc for enum getters/setters correspond to enum class. (#​24515) (996e04c)
• Add option for PHP to emit default values for JSON. (#​23985) (6df6c8a)
• Implement hasPresence helper in PHP, remove broken hasOptionalKeyword. (69efbc6)

PHP C-Extension

• Regenerated files. (a9bbf7a)
• Raise minimum php version to 8.2.0. Drop tests for 8.1. (5d29dca)
• Feat(php): support default values for editions/proto2 (#​25161) (b01099d)
• Breaking change: Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead. (4208121)
• Automated rollback of commit 8f569de. (94fe944)
• Add option for PHP to emit default values for JSON. (#​23985) (6df6c8a)
• Implement hasPresence helper in PHP, remove broken hasOptionalKeyword. (69efbc6)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Drop references to x64-mingw32 since we no longer support Ruby 3.0. (2b927f1)
• Bump gem dependencies (659e0f3)
• Ruby codegen: support generation of rbs files (#​15633) (6ebdf85)
• Support Ruby 4.0 (#​25051) (93f4eba)

Ruby C-Extension

• Regenerated files. (a9bbf7a)
• Remove direct dependency on rules_apple (#​25708) (e06c026)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Add recursion guards for the following nested messages: (#​25807) (c52dcb4)
• Fix breaking change related to upb_c_proto_library and upb_proto_reflection_library (b0150c0)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Add conformance tests for utf8 validation. (e8923a8)
• Added more validations of syntax and edition when parsing descriptors. (4c5c4b2)
• Fixes a compiler crash when building the Windows arm64 Ruby/Python extension (0e84323)
• Add BTI to branch targets when branch protection is enabled. This resolves (a3ca522)
• Enable edition 2024 in upb generators (e44d421)

Other

• Replace lingering references to cpu with platform equivalents. (3dfa37f)
• Internal change (#​25839) (a2ae0e5)
• Update the path to prebuilt_tool_integrity.bzl after refactor. (5c2ac46)
• Add missing timestamp_upb_reflection_proto alias (e9d6bcb)
• Update Ruby 4.0 test Docker image and enable continuous tests. (0ecc6fe)
• Auto-generate files after cl/862026607 (978b556)
• Roll forward generate_release_notes = false (b6e3802)
• Revert release_ruleset version (88d2062)
• Fix generate_changelog -> generate_release_notes (#​25442) (68ac7b9)
• Update release_bazel_module.yaml (#​25441) (1add73b)
• Drop Bazel 7 tests for bazel, python, partially java partially cpp. (b046c9a)
• Update protobuf's dep on bazel-skylib to version 1.9.0 (27e67a7)
• Breaking change: Remove deprecated flag for enabling MSVC support (97c979b)
• Protobuf: update php from macos-13 to macos-15-intel (7b9feca)
• Bazel: Remove hardcoded dependency on //:protoc from language runtimes (#​19679) (4986a77)
• Move ObjC to the next major version to be ready for release in 2026Q1. (31cadad)

v34.0-rc2: Protocol Buffers v34.0-rc2

Compare Source

Announcements

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

Bazel

• Fix the prefer_prebuilt_protoc alias to use the correct originally announced location (732ed49)
• Actually fix breaking change related to upb_proto_reflection_library (86d434b)
• Fix breaking change related to upb_c_proto_library and upb_proto_reflection_library (b0150c0)
• Add an alias to undo accidental unannounced breaking change (e71d379)
• Moved prebuilt-related Bazel files to standard locations. (cfe8991)
• Refactored and rearranged Bazel rules. (d7dd1e1)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Introduce Starlark versions of Protobuf flags. (d1f4b2f)

Compiler

• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Validate Feature Support on Custom Options (2985930)

C++

• Fix broken field_mask_upb_proto and field_mask_upb_reflection_proto aliases (d808a97)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)
• Validate Feature Support on Custom Options (2985930)
• Auto-generate files after PR #​25437 (8be64ea)
• Update rules_apple dependency to support rules_swift 3.x (#​25437) (c0e15f2)
• Fix UTF-8 Validation of string extensions in C++ (35ba5cf)
• Improve wire compatibility of TestAllTypes with TestAllExtensions. (08355bd)

Python

• Use the toolchain protoc by default in internal rules. (41ad19a)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)

PHP

• Bump version dependencies on phpunit/phpunit to ">=11.5.0 <12.0.0" (4e82ce4)

Ruby

• Bump gem dependencies (659e0f3)

UPB (Python/PHP/Ruby C-Extension)

• Fix breaking change related to upb_c_proto_library and upb_proto_reflection_library (b0150c0)
• Removed the third_party/upb/upb/bazel directory. (7efbfe1)

Other

• Add missing timestamp_upb_reflection_proto alias (e9d6bcb)
• Update Ruby 4.0 test Docker image and enable continuous tests. (0ecc6fe)
• Auto-generate files after cl/862026607 (978b556)
• Roll forward generate_release_notes = false (b6e3802)
• Revert release_ruleset version (88d2062)
• Fix generate_changelog -> generate_release_notes (#​25442) (68ac7b9)
• Update release_bazel_module.yaml (#​25441) (1add73b)

v34.0-rc1.1: Protocol Buffers v34.0-rc1

Compare Source

Announcements

• This version includes breaking changes to: C++, Objective-C, PHP, Python.
• [Bazel] Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (0a5c2f6)
• [C++] Make generator headers private (3a2af35)
• [C++] Add a debug check that the target of CopyFrom is not a descendant of the source. (7a75898)
• [C++] Add [[nodiscard]] to many APIs. (a70115f)
• [C++] Make the arena-enabled constructors of RepeatedField, RepeatedPtrField, and Map private. (ef890c3)
• [C++] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (b76faa9)
• [C++] Removes proto2::util::MessageDifferencer::AddIgnoreCriteria that takes a raw pointer as an argument in favor of the overload that takes a unique_ptr. Remove macro PROTOBUF_FUTURE_REMOVE_ADD_IGNORE_CRITERIA (b115358)
• [C++] Remove deprecated FieldDescriptor::has_optional_keyword() in OSS. Use is_repeated() or has_presence() instead (68346ec)
• [C++] Remove AddUnusedImportTrackFile() and ClearUnusedImportTrackFiles(). Remove PROTOBUF_FUTURE_RENAME_ADD_UNUSED_IMPORT (837a2cd)
• [C++] Remove deprecated FieldDescriptor::is_optional() in OSS. Use (!is_required() && !is_repeated()) instead (9dbc5d4)
• [C++] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (c301c2c)
• [C++] All entity names have length limit (2afb0dc)
• [ObjC] Remove generate_minimal_imports generation option warning (45b1297)
• [ObjC] Fix nullability annotations on some GPB*Dictionary types. (ea67d6d)
• [ObjC] Remove -[GPBFieldDescriptor optional] (3414dc1)
• [Other] Remove deprecated flag for enabling MSVC support (97c979b)
• [PHP] Remove deprecated PHP APIs (9c45014)
• [PHP] Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead. (4208121, cd76e67, 4208121)
• [PHP] Add PHP typehints for setters and remove redundant GPBUtil checks (#​25296) (aee03b7)
• [PHP] support default values for editions/proto2 (#​25161) (b01099d)
• [Python] Raise errors in OSS when assign bool to int/enum field in Python Proto. (5b116fe)
• [Python] Remove float_format/double_format from python proto text_format (e4854a1)
• [Python] Raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) (00aaca1)
• [Python] Remove float_precision from python proto json_format (f027f1f)
• [Python] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (b76faa9)
• [Python] Remove deprecated FieldDescriptor.label (0a8ff55)
• [Python] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (c301c2c)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.
• Migration Guide may include additional guidance for breaking changes.

Bazel

• Fix: cc_toolchain should prefer protoc when prebuilt flag is flipped. (#​25168) (8c857c3)
• Breaking change: Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (0a5c2f6)
• Feat(bazel): wire up prebuilt protoc toolchain (#​24115) (cc23698)
• Migrate proto_descriptor_set (#​23369) (8d4dfdd)

Compiler

• Ruby codegen: support generation of rbs files (#​15633) ([`

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