Protocol Buffers v27.0-rc1

Announcements

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

Compiler

• Officially release Editions in 27.0. (baa83b6)
• Define lifetimes of edition 2023 features (77f62de)
• Implement feature lifetime validation in protoc and the C++ runtime. (b3b4497)
• Add edition lifetime options for feature specs. (b09b3e4)
• Enable editions support for Java Lite. (500c953)
• Release edition defaults CLI arguments. (7a0e10e)
• Update protoc release to include editions language features protos for Java and C++ (6483c47)

C++

• [C++] Ensure we allocate overaligned types with aligned operator new. (11ef0ff)
• Fix text-format delimited field handling (29c69ff)
• In debug mode, after clearing oneof messages on arenas, poison them if ASAN. (8826baf)
• Allow string_type for Edition 2023. (d8251eb)
• Breaking change: Ensure we allocate overaligned types with aligned operator new. (11ef0ff)
• Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set (#15887) (86abf35)
• Move java_features.proto to java/core/srce/main/resources (274bc7f)
• Add an RAII namespace printer helper for C++ codegen. (8599ab5)
• Enable editions support for Java Lite. (500c953)
• Add an RAII ifndef helper for C++ codegen. (1087274)
• Clear oneof message fields even on arena on non-OPT builds. (5c183bd)
• Implement edition 2023 support in all Ruby runtimes. (bca8fb6)
• Release edition defaults CLI arguments. (7a0e10e)
• Deprecate Arena::CreateMessage for OSS. (d4bfe52)
• Open sourcing reflection_visit_fieds. (cfc07df)
• Fixed the use of c++ keywords within namespace names (#15954) (988194a)
• Fix pkg-config metadata for shared abseil on windows (#15888) (fe6edca)
• Add GetStringView() and GetRepeatedStringView() with scratch. (a3f5af0)
• Avoid a 'may be used uninitialized' warning when built with '-c opt'. (#15846) (eb70b34)
• Add software prefetch to ByteSizeLong (948ca2e)
• Add prefetching in arena blocks. (9e57b8e)
• Breaking change: Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (2699579)
• Rename the 'includingDefaultValueWithoutPresenceFields' and 'always_print_without_presence_fields' to 'alwaysPrintFieldsWithNoPresence' in the Cpp, Py and Java JSON serializers for consistency. (7d43131)
• Remove tags for arena cleanup nodes now that we have dedicated string cleanup blocks. (202b106)
• Avoid unused-parameter warning in field accessor listeners. (f4d5c2c)
• Add new 'always_print_without_presence_fields' option to the C++ JSON serializer. (671b61b)
• Fail to build descriptor if ctype is specified for non string/bytes fields (8b4c7a1)
• Check ctype() in DescriptorBuilder for edition 2023 and beyond. (307aeac)
• Fail building descriptors if ctype is used for fields other than string or bytes. (403e207)
• Fix generation of HasExtension and ExtensionSize functions to restrict to the (9f5be07)
• Add the privacy manifest to the C++ CocoaPod. (982ea24)

Java

• Define lifetimes of edition 2023 features (77f62de)
• Check that size is non-negative when reading string or bytes in StreamDecoder. (a94f57b)
• Fix text-format delimited field handling (29c69ff)
• Move java_features.proto to java/core/srce/main/resources (274bc7f)
• Add java_features.proto to kotlin_mvn release (369732a)
• Enable editions support for Java Lite. (500c953)
• Fix descriptor to access type via getType() s.t. messages using delimited encoding are consistently treated as groups for Java lite. (9f001a9)
• Make UnsafeByteOperations stable; removing experimental annotation. (0070ac1)
• Fix features inheritance of oneof fields and extensions and fix/move unit tests to actually run. (eb10ebd)
• Add software prefetch to ByteSizeLong (948ca2e)
• Breaking change: Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (2699579)
• Rename the 'includingDefaultValueWithoutPresenceFields' and 'always_print_without_presence_fields' to 'alwaysPrintFieldsWithNoPresence' in the Cpp, Py and Java JSON serializers for consistency. (7d43131)
• Add a new 'includingDefaultValueWithoutPresenceFields' option to the Java parser which is intended to replace the current 'includingDefaultValueFields'. (58baeb4)

Kotlin

• Add java_features.proto to kotlin_mvn release (369732a)

Csharp

• C#: Optimize JSON parsing in JsonTokenizer (68e6e3e)
• C#: Avoid string concatenation when looking up enum values by name. (e6684ac)
• Cache StringBuilder instances in the .NET JsonTextTokenizer. (fac929d)
• Enable Editions in the C# generator. (421040b)
• Runtime support for Protobuf Editions in C#. (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. (139ea4d)
• C#: Ignore invalid enum string values in JSON, when invalid fields are being ignored. (55e50ba40679eb82269c62872116b...

Protocol Buffers v26.1

Announcements

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

C++

• Expand cpp_features_proto_srcs visibility (2d3d8ba)
• Move java_features.proto to java/core/srce/main/resources (22f1170)

Java

• Fix validateFeatures to be called after resolved features are actually set to this.features (9bf69ec)
• Move java_features.proto to java/core/srce/main/resources (22f1170)
• Set label to REQUIRED for descriptors with LEGACY_REQUIRED feature. (4886a9c)
• Add java_features.proto to kotlin_mvn release (0e4abf9)

Kotlin

• Add java_features.proto to kotlin_mvn release (0e4abf9)

Ruby

• Cherry-pick required label handling in JRuby field descriptor from bca8fb6 (2e51ff6)

Other

• Update protoc release to include editions language features protos for Java and C++ (7f45773)
• Fix Android platforms constraint (#16246) (#16271) (b4e1870)
• Add back android config_setting that looks for //external:android/crosstool (#16127) (#16264) (a97c927)

Protocol Buffers v26.0

Announcements

• This version includes breaking changes to: Java, PHP, C++, Ruby, Python.
  • [Java] Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
  • [Java] Remove unused helper methods for creating new mutable arraylists. (7874474)
  • [Java] Use Editions features in Java full runtimes. (65c65c2)
  • [Java] Stop generating the "newInstance" method. This is not used anymore. (c0d08bd)
  • [Java] Remove unused overload of AbstractMessageLite.addAll that worked on a Collection instead of a List. (3b9bd6d)
  • [Java] Remove obsolete runtime internalBuildGeneratedFileFrom which was for backwards compatibility with old gencode. (9310d2e)
  • [Java] Remove unnecessary overloads of methods: (94a2a44)
  • [Java] Remove unnecessary generated overrides for GeneratedMessage.Builder methods: (7bff169)
  • [Java] The base class for generated messages will be GeneratedMessage, not GeneratedMessageV3.
  • [Java] Remove deprecated runtime methods for compatibility with old v2.x.x gencode. (e555bd2)
  • [Java] Remove deprecated TextFormat print methods. These should be replaced by corresponding TextFormat.printer() methods. (dfb8a4c)
  • [Java] Lock down visibility for descriptor syntax APIs. (1aeacd4)
  • [Java] Make deprecated Java gencode PARSER variable private. (b4858b2)
  • [PHP] Validate UTF-8 in string setters, as previously announced. (d14dbbc)
  • [PHP] Remove deprecated legacy class aliases. (#15709) (096e127)
  • [PHP] Remove support for PHP generic services (40ad3fa)
  • [C++] Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
  • [C++] Remove const GetArena method on RepeatedPtrField (748ab16)
  • [C++] Disallow incorrect ctype usage (755b690)
  • [C++] Remove deprecated std::string error collector overrides (543fbcd)
  • [C++] Promote ExtensionRange to a proper class (5b12bc8)
  • [C++] Remove deprecated clear APIs on repeated fields (229906f)
  • [C++] Remove C++ legacy syntax descriptor APIs (cf2d696)
  • [C++] Remove deprecated syntax APIs (715b543)
  • [C++] Remove deprecated SupportsUnknownEnumValues method (0a6a516)
  • [Ruby] Removed syntax and added has_presence?/is_packed?. (dbd4dce)
  • [Ruby] Fixed json_encode/json_decode to use the message's pool. (a8b8ea0)
  • [Ruby] Freeze is now recursive, affecting all sub-messages, maps, and repeated fields. (31313b1)
  • [Ruby] Fixed inconsistencies in Message#to_h, as previously announced. (fd69938)
  • [Ruby] Dropped support for Ruby DSL, as previously announced. (5cfc9e7)
  • [Ruby] Lock down visibility for descriptor syntax APIs. (1aeacd4)
  • [Python] Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
  • [Python] Removed obsolete/duplicate setup.py from Python. (#15708) (5722aef)
  • [Python] Made text_format output default to UTF-8. (bf00034)
  • [Python] Remove RegisterExtension in message class (4ebba68)
  • [Python] Reject extend repeated field with none iterable (Raise TypeError) (1658213)
  • [Python] Remove Deprecated APIs that add non top descriptor. (c51f111)
  • [Python] Check if Timestamp is valid. (4f77929)
  • [Python] Remove msg.UnknownFields() support in pure python and cpp extension. (0eac77c)
  • [Python] Remove deprecated syntax accessor. (fd40c87)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Compiler

• Add <shellapi.h> include for CommandLineToArgvW (2299e1d)
• Fix getting env variables on windows (#15518) (71b0b4e)
• Proper fix utf8 command line arguments (#14253) (1eff9d7)
• Allocate an editions FeatureSet extension for https://github.com/bufbuild/protobuf-es (fedd34d)
• Make rules_ruby a dev-only dependency. (571b727)

C++

• Remove rust proto libraries from the editions/BUILD file. (1f9d9fb)
• Fix CMake regex escaping. (3ad69cf)
• Escape _from_dir in install.cmake for regex special characters (e.g. c++) before REGEX REPLACE. (f740f52)
• Tweak BUILD setup to make the layering check change less disruptive (#15838) (52aa150)
• Add missing alias targets for C++ util libraries (#15783) (62e7a56)
• Breaking change: Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
• Rename the 'includingDefaultValueWithoutPresenceFields' and 'always_print_without_presence_fields' to 'alwaysPrintFieldsWithNoPresence' in the Cpp, Py and Java JSON serializers for consistency. (fc41e78)
• Add new 'always_print_without_presence_fields' option to the C++ JSON serializer. (1f3bf1d)
• Remove use of mach_absolute_time (#15554) (#15662) (8b0f6fd)
• Check ctype() in DescriptorBuilder for edition 2023 and beyond. (0090f19)
• Fail building descriptors if ctype is used for fields other than string or bytes. (624d65d)
• [CPP] Add the privacy manifest to the C++ CocoaPod. (#15664) (e7888a1)
• Correct type_resolver_util to set syntax=proto3 instead of syntax=pro...

Protocol Buffers v26.0-rc3

Announcements

• This version includes breaking changes to Ruby.
  • Moved ObjectCache into an internal module. (9087337)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Remove rust proto libraries from the editions/BUILD file. (1f9d9fb)
• Fix CMake regex escaping. (3ad69cf)
• Escape _from_dir in install.cmake for regex special characters (e.g. c++) before REGEX REPLACE. (f740f52)
• Tweak BUILD setup to make the layering check change less disruptive (#15838) (52aa150)
• Add missing alias targets for C++ util libraries (#15783) (62e7a56)

Rust

• Tweak BUILD setup to make the layering check change less disruptive (#15838) (52aa150)

PHP

PHP C-Extension

• Updated amalgamations for PHP and Ruby. (c773dc9)
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Ruby implement memsize functions for native types (#10291) (4902fc0)
• Moved ObjectCache into an internal module. (9087337)

Ruby C-Extension

• Updated amalgamations for PHP and Ruby. (c773dc9)
• Ruby implement memsize functions for native types (#10291) (4902fc0)
• Moved ObjectCache into an internal module. (9087337)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Ruby implement memsize functions for native types (#10291) (4902fc0)

Other

• Disabled macOS 8.2, to match main. (9dfa2b6)

Protocol Buffers v25.3

Announcements

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

Apple Privacy Manifest Requirement

• [CPP] Add the privacy manifest to the C++ CocoaPod. (9d1bc10)
• [ObjC] Add the privacy manifest to the ObjC CocoaPod. (cec08dc)
• Add PrivacyInfo.xcprivacy (#15557) (cf87faa)

C++

• Remove use of mach_absolute_time (#15554) (76d05d4)

Objective-C

• [ObjC] Use a local to avoid warnings in 32bit builds. (9dc736d)

Python

• Bump python version to 3.9 for gcloud 460.0.0 (17ec19d)

Ruby

• Update Ruby GHA to test against Ruby 3.3. (25b1e81)
• Pin bundler version to 2.4.22 for Ruby 2.7 support. (80b4586)

Protocol Buffers v26.0-rc2

Announcements

• This version includes breaking changes to: C++, Java, PHP, Python.
  • [PHP] Remove deprecated legacy class aliases. (#15709) (096e127)
  • [Java] Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
  • [Python] Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
  • [Python] Removed obsolete/duplicate setup.py from Python. (#15708) (5722aef)
  • [C++] Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Breaking change: Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
• Rename the 'includingDefaultValueWithoutPresenceFields' and 'always_print_without_presence_fields' to 'alwaysPrintFieldsWithNoPresence' in the Cpp, Py and Java JSON serializers for consistency. (fc41e78)
• Add new 'always_print_without_presence_fields' option to the C++ JSON serializer. (1f3bf1d)
• Remove use of mach_absolute_time (#15554) (#15662) (8b0f6fd)
• Check ctype() in DescriptorBuilder for edition 2023 and beyond. (0090f19)
• Fail building descriptors if ctype is used for fields other than string or bytes. (624d65d)
• [CPP] Add the privacy manifest to the C++ CocoaPod. (#15664) (e7888a1)

Java

• Breaking change: Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
• Rename the 'includingDefaultValueWithoutPresenceFields' and 'always_print_without_presence_fields' to 'alwaysPrintFieldsWithNoPresence' in the Cpp, Py and Java JSON serializers for consistency. (fc41e78)
• Add a new 'includingDefaultValueWithoutPresenceFields' option to the Java parser which is intended to replace the current 'includingDefaultValueFields'. (043191b)
• Force descriptor initialization of dependencies before internalUpdateFileDescriptor(). (#15718) (4dec1a7)
• Correctly set maven-compiler-plugin to >= Java 1.8 per our minimum Java version (#15707) (6028cdb)
• Update internalUpdateFileDescriptor() to synchronize setProto() and resolveAllFeatures() to avoid data races. (#15659) (225b080)

Objective-C

• [ObjC] Use a local to avoid warnings in 32bit builds. (#15665) (394aec8)
• [ObjC] Add the privacy manifest to the ObjC CocoaPod. (#15663) (935fcb7)

Python

• Adhere to PEP 8 (#15127) (#15729) (3b92f4f)
• Breaking change: Remove the deprecated always_print_primitive_fields option from Java, Python and C++ JSON parsers. (06e7cab)
• Rename the 'includingDefaultValueWithoutPresenceFields' and 'always_print_without_presence_fields' to 'alwaysPrintFieldsWithNoPresence' in the Cpp, Py and Java JSON serializers for consistency. (fc41e78)
• Add new including_default_value_without_presence_fields to Python JSON serializer. (c530216)
• Breaking change: Removed obsolete/duplicate setup.py from Python. (#15708) (5722aef)

PHP

• Don't break the trace (#11311) (#15727) (3e99024)
• Fix inconsistent timestamp json encode/decode (#12396) (#15726) (e99f27e)
• Breaking change: Remove deprecated legacy class aliases. (#15709) (096e127)

Ruby

• Increased the size of the error message buffer by 4x, to 511 bytes. (#15728) (ab6bcba)
• Move the RubyMessage.java JSON "include defaults" to use alwaysPrintFieldsWithNoPresence. (b5beba3)

UPB (Python/PHP/Ruby C-Extension)

• Increased the size of the error message buffer by 4x, to 511 bytes. (#15728) (ab6bcba)

Other

• Add PrivacyInfo.xcprivacy (#15557) (#15661) (5a5ec6c)

Protocol Buffers v26.0-rc1

Announcements

• This version includes breaking changes to: C++, Java, PHP, Python, Ruby.
  • [C++] Make protobuf comply with the C++ layering check (a7b0421)
  • [C++] Remove const GetArena method on RepeatedPtrField (748ab16)
  • [C++] Disallow incorrect ctype usage (755b690)
  • [C++] Remove deprecated std::string error collector overrides (543fbcd)
  • [C++] Promote ExtensionRange to a proper class (5b12bc8)
  • [C++] Remove deprecated clear APIs on repeated fields (229906f)
  • [C++] Remove C++ legacy syntax descriptor APIs (cf2d696)
  • [C++] Remove deprecated syntax APIs (715b543)
  • [C++] Remove deprecated SupportsUnknownEnumValues method (0a6a516)
  • [Java] Remove unused helper methods for creating new mutable arraylists. (7874474)
  • [Java] Use Editions features in Java full runtimes. (65c65c2)
  • [Java] Stop generating the "newInstance" method. This is not used anymore. (c0d08bd)
  • [Java] Remove unused overload of AbstractMessageLite.addAll that worked on a Collection instead of a List. (3b9bd6d)
  • [Java] Remove obsolete runtime internalBuildGeneratedFileFrom which was for backwards compatibility with old gencode. (9310d2e)
  • [Java] Remove unnecessary overloads of methods: (94a2a44)
  • [Java] Remove unnecessary generated overrides for GeneratedMessage.Builder methods: (7bff169)
  • [Java] The base class for generated messages will be GeneratedMessage, not GeneratedMessageV3.
    (5df0387)
  • [Java] Remove deprecated runtime methods for compatibility with old v2.x.x gencode. (e555bd2)
  • [Java] Remove deprecated TextFormat print methods. These should be replaced by corresponding TextFormat.printer() methods. (dfb8a4c)
  • [Java] Lock down visibility for descriptor syntax APIs. (1aeacd4)
  • [Java] Make deprecated Java gencode PARSER variable private. (b4858b2)
  • [PHP] Validate UTF-8 in string setters, as previously announced. (d14dbbc)
  • [PHP] Remove support for PHP generic services (40ad3fa)
  • [Python] Made text_format output default to UTF-8. (bf00034)
  • [Python] Remove deprecated syntax accessor. (fd40c87)
  • [Python] Remove RegisterExtension in message class (4ebba68)
  • [Python] Reject extend repeated field with none iterable (Raise TypeError) (1658213)
  • [Python] Remove Deprecated APIs that add non top descriptor. (c51f111)
  • [Python] check if Timestamp is valid. (4f77929)
  • [Python] Remove msg.UnknownFields() support in pure python and cpp extension. (0eac77c)
  • [Ruby] Removed syntax and added has_presence?/is_packed?. (dbd4dce)
  • [Ruby] Fixed json_encode/json_decode to use the message's pool. (a8b8ea0)
  • [Ruby] Freeze is now recursive, affecting all sub-messages, maps, and repeated fields. (31313b1)
  • [Ruby] Fixed inconsistencies in Message#to_h, as previously announced. (fd69938)
  • [Ruby] Dropped support for Ruby DSL, as previously announced. (5cfc9e7)
  • [Ruby] Lock down visibility for descriptor syntax APIs. (1aeacd4)
  • [Ruby] Fixed json_encode/json_decode to use the message's pool. (a8b8ea0)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Compiler

• Fix getting env variables on windows (#15518) (71b0b4e)
• Proper fix utf8 command line arguments (#14253) (1eff9d7)
• Allocate an editions FeatureSet extension for https://github.com/bufbuild/protobuf-es (fedd34d)
• Make rules_ruby a dev-only dependency. (571b727)

C++

• Correct type_resolver_util to set syntax=proto3 instead of syntax=proto2 on proto3 files. (040dde7)
• Remove edition getter from C++ descriptor APIs (93b219f)
• Breaking change: Remove const GetArena method on RepeatedPtrField (748ab16)
• Breaking change: Disallow incorrect ctype usage (755b690)
• Breaking change: Remove deprecated std::string error collector overrides (543fbcd)
• Breaking change: Promote ExtensionRange to a proper class (5b12bc8)
• Breaking change: Remove deprecated clear APIs on repeated fields (229906f)
• Breaking change: Remove C++ legacy syntax descriptor APIs (cf2d696)
• Fixed UTF-8 TextFormat output to protect against invalid UTF-8 in string fields. (1ac8c04)
• Breaking change: Remove deprecated syntax APIs (715b543)
• Fix DurationToMilliseconds mult overflow (17b8dd6)
• Breaking change: Remove deprecated SupportsUnknownEnumValues method (0a6a516)
• Have Arena::Create support arena constructible types (578e07e)
• Enforce stricter version checks for Protobuf C++ by removing the notion of "minimal version of protoc/headers"; exact version match is required. (6eed7a2)
• Compare explicit zeroes from prototext in partially. (8c24163)
• Move the declarations in SerialArena to more closely match the style guide. (349122f)

Java

• Drop Protobuf support for Android KitKat per EOL and add existing minimum Java 1.8 in Maven pom.xmls (303239d)
• Breaking change: Remove unused helper met...

Protocol Buffers v25.2

Announcements

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

C++

• Only substitute prefixes during installation setup. (05ad652)
• Register a shutdown delete for C++ feature defaults (3d5c709)

Protocol Buffers v25.1

Announcements

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

Python

• Raise warnings for deprecated python syntax usages (74f5cf4)

Ruby

• Add support for extensions in CRuby, JRuby, and FFI Ruby (#14703) (#14756) (e4b00c7)
• Add support for options in CRuby, JRuby and FFI (#14594) (#14739) (2495d4f)

Protocol Buffers v25.0

Announcements

• This release fixes CVE-2024-2410 (note: there may be a delay in the publication of this CVE number), a minor vulnerability in the C++ JSON parser. In certain situations, a malicious JSON input could cause the parser to copy data that has already been freed into an error message. This can only happen if the code is parsing from a stream with separate chunks rather than a contiguous array. The bug was introduced in 4.22.0 and was fixed with b955165 in 4.25.0 and up.
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Compiler

• Implement proto2/proto3 with editions (3813b66)
• Defines Protobuf compiler version strings as macros and separates out suffix string definition. (3c59585)
• Add utf8_validation feature back to the global feature set. (153028d)
• Setting up version updater to prepare for poison pills and embedding version info into C++, Python and Java gencode. (4322e00)
• Merge the protobuf and upb Bazel repos (7286ffc)
• Editions: Introduce functionality to protoc for generating edition feature set defaults. (4019e25)
• Editions: Migrate edition strings to enum in C++ code. (f083ebf)
• Create a reflection helper for ExtensionIdentifier. (4d5ab73)
• Editions: Provide an API for C++ generators to specify their features. (e897bcf)
• Editions: Refactor feature resolution to use an intermediate message. (57d8049)
• Publish extension declarations with declaration verifications. (e72b0e1)
• Editions: Stop propagating partially resolved feature sets to plugins. (b66ef4c)
• Editions: Migrate string_field_validation to a C++ feature (1f95830)
• Editions: Include defaults for any features in the generated pool. (15863ff)
• Protoc: parser rejects explicit use of map_entry option (#13479) (8f59292)
• Protoc: validate that reserved range start is before end (#13474) (3be00f7)
• Protoc: support identifiers as reserved names in addition to string literals (only in editions) (#13471) (e701f4f)
• Drop support for Bazel 5. (a80daa2)
• Allow code generators to specify whether or not they support editions. (2176a14)

C++

• Set PROTOBUF_EXPORT on InternalOutOfLineDeleteMessageLite() (#14434) (db89a51)
• Update stale checked-in files (#14431) (ada0be8)
• Apply PROTOBUF_NOINLINE to declarations of some functions that want it. (6e848b0)
• Implement proto2/proto3 with editions (3813b66)
• Make JSON UTF-8 boundary check inclusive of the largest possible UTF-8 character. (e80b8ec)
• Reduce Map::size_type to 32-bits. Protobuf containers can't have more than (95d2b2e)
• Defines Protobuf compiler version strings as macros and separates out suffix string definition. (3c59585)
• Add ABSL_ATTRIBUTE_LIFETIME_BOUND attribute on generated oneof accessors. (e33e0d2)
• Fix bug in reflection based Swap of map fields. (bef5b75)
• Add utf8_validation feature back to the global feature set. (153028d)
• Setting up version updater to prepare for poison pills and embedding version info into C++, Python and Java gencode. (4322e00)
• Add prefetching to arena allocations. (fbdeb5a)
• Merge the protobuf and upb Bazel repos (7286ffc)
• Add ABSL_ATTRIBUTE_LIFETIME_BOUND attribute on generated repeated and map field accessors. (9a0a3cf)
• Editions: Migrate edition strings to enum in C++ code. (f083ebf)
• Workaround ICE on gcc 7.5 by not having one overload call the other one with a (0522054)
• Create a reflection helper for ExtensionIdentifier. (4d5ab73)
• Editions: Provide an API for C++ generators to specify their features. (e897bcf)
• Add ABSL_ATTRIBUTE_LIFETIME_BOUND attribute on generated string field accessors. (18c338a)
• Editions: Refactor feature resolution to use an intermediate message. (57d8049)
• Fixes for 32-bit MSVC. (66cf6b1)
• Publish extension declarations with declaration verifications. (e72b0e1)
• Export the constants in protobuf's any.h to support DLL builds. (fd24b1b)
• Implement AbslStringify for the Descriptor family of types. (230232a)
• Add ABSL_ATTRIBUTE_LIFETIME_BOUND attribute on generated message field accessors. (064035c)
• Editions: Stop propagating partially resolved feature sets to plugins. (b66ef4c)
• Editions: Migrate string_field_validation to a C++ feature (1f95830)
• Editions: Include defaults for any features in the generated pool. (15863ff)
• Introduce C++ feature for UTF8 validation. (c7119e6)
• Protoc: validate that reserved range start is before end (#13474) (3be00f7)
• Remove option to disable the table-driven parser in protoc. (6d03f9b)
• Lock down ctype=CORD in proto file. (b359e50)
• Support split repeated fields. (5b5e5bf)
• In OSS mode omit some extern template specializations. We have seen reports of (ab96824)
• Automated rollback of commit adb2c4b. (0ea0052)
• Allow code generators to specify whether or not they support editions. (2176a14)
• Handle conflicting macros for FreeBSD (#13303) (2a95295)

Java

• Implement proto2/proto3 with editions (3813b66)
• Remove synthetic oneofs from Java gencode field accessor tables. (https://github.com/protocolbuffers/protobuf...