v33.0: Protocol Buffers v33.0

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Announcements

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

Bazel

• Feat: update bazel central registry publish workflow (#​23465) (#​23913) (d5217fd)
• Add target_compatible_with parameter to proto_toolchain in Bazel rules (#​22429) (30d2332)
• Bazel: add missing rules_cc loads (#​23584) (d98e2ef)

Compiler

• Disable symbol visibility enforcement by default in C++ runtime (ae308fc)
• Ship all option dependencies to plugins along with regular ones. (abeb130)

C++

• Avoid calling deprecated arena-enabled constructors in arena.h. (813a7ef)
• Add a macro to make RepeatedField(Arena*) constructor private in a future release. (768db14)
• Add a macro to make Map(Arena*) constructor private in a future release. (543a17f)
• Optimize ReadPackedVarint (3d94d83)
• Add a macro to make RepeatedPtrField(Arena*) constructor private in a future release (6422b9d)
• Add IsEmpty() function to reflection. (b64e490)
• Refactor RuntimeAssertInBounds to remove repeated logic and make Get/Mutable easier to read. (2f270c4)
• Disable symbol visibility enforcement by default in C++ runtime (ae308fc)
• Fix a bug in the main C++ JSON parser/serializer camelcasing of certain non-style-compliant names incorrectly, in a way that would prevent it from interoperating with any other implementation on those fields. (e25e267)
• Fail early for messages with more than 65k fields. (90824aa)
• Add option to C++ JSON Parser/Serializer to allow customers to affirmatively disable legacy bug-compatibilty behaviors. (6ea1640)
• Fix mishandling on JSON serialization of Timestamp with invalid negative and too-large nanos value. (a959f27)
• Preserve features in type resolver (c7030f4)
• Add a DCHECK that ArenaStringPtr::Set(char*, Arena*) is not called with (95b1763)

Java

• Switch the pre22 warning to use CopyOnWriteArraySet. (#​23969) (e55224c)
• Expose helpers for checking if messages and enums are nested. (8de4002)
• Fix a bug calculating the file name in the absense of directories. (c4ff7a6)
• Clarify the public APIs of GeneratorNames helpers. (537ac35)
• Expose helpers to predict generated class names in java. (eba6df2)
• Deprecate ClassName methods in favor of new QualifiedClassName ones. (ca4fb2f)
• Restore the 3-argument internalBuildGeneratedFileFrom. (4376591)
• Fix large java enums not being honored on lite runtime. (a995803)
• Slightly relax Java Poison Pill on prerelease versions (-rc1, -dev, etc). (7b0bee3)
• Avoid boxing/unboxing varint, fixed32, and fixed64 fields in UnknownFieldSet.Field (810272f)
• Readd new*List() methods on GeneratedMessageV3. (badaf41)
• Add Values.of(Map<String, Value> values). (c518f25)
• Fix handling of optional dependencies in java generator. (8d51e34)
• Restore ABI compatibility for extension methods which was previously (knowingly) broken with 4.x: 94a2a44 (ea33ae8)
• Restore Protobuf Java extension modifiers in gencode that were previously removed in 7bff169 (f2257f5)
• Ship all option dependencies to plugins along with regular ones. (abeb130)
• Optimize redaction state calculation (e05db5c)
• Add isPlaceholder() accessors to file, message, and enum descriptors (f978ec2)
• Improve Java gencode static initialization to avoid unnecessary temporaries again (745e15b)
• Improve Java gencode static initialization to avoid unnecessary temporaries (b68b673)
• Remove protobuf-util usages of guava except annotations. (5768acd)
• Restore compatibility of runtime with pre-3.22.x gencode impacted by CVE-2022-3171 (7c51e5b)
• Expose an iterator for GeneratedMessage.ExtendableMessage.extensions (b25d39e)

Rust

• Change Rust prelude to bring in traits as _ (c3f7e8d)
• Make message Muts Send (8bff944)
• See also UPB changes below, which may affect Rust.

Python

• Publish s390x wheels for Python/upb. (56b2b89)
• Fix a crash that happens during shutdown due to looking up modules in the cache (d57d270)
• Add construction support for repeated Timestamp/Duration/Struct/ListValue. (5f6c013)
• Fix handling of repeated extension fields in PyProto JSON (07ef676)
• Fixed a parser bug where closed enums are parsed incorrectly for non-repeated extensions. (c36f728)
• Fixed mypy errors by setting __slots__ to empty in .pyi files. (38ca2d3)
• Raise warnings for float_precision from python json_format. (4659cd7)
• Raise warnings when assign bool to int/enum field in Python Proto. This will turn into error in 34.0 release. (4ee55d7)

PHP

• Fix(php): php errors on repeated field (#​23372) (6fee29b)

UPB (Python/PHP/Ruby C-Extension)

• Fixed a parser bug where closed enums are parsed incorrectly for non-repeated extensions. (c36f728)

Other

• Update token for BCR release to reuse existing BOT_ACCESS_TOKEN used for staleness_refresh.yml and update_php_repo.yml (#​23925) (dcace2f)
• Use the 'better' JSON parser on the conformance suite harness. (4b4e405)
• Add JSON conformance test that a single value provided for a repeated field should parse fail. (9806994)
• Add conformance test cases for malformed nanos fields on Durations and Timestamps. (a6bdd0a)