v3.13.0

Compare Source

PHP

• The C extension is completely rewritten. The new C extension has significantly
  better parsing performance and fixes a handful of conformance issues. It will
  also make it easier to add support for more features like proto2 and proto3 presence.
• The new C extension does not support PHP 5.x, which is the reason for the major
  version bump. PHP 5.x users can still use pure-PHP.

C++

• Removed deprecated unsafe arena string accessors
• Enabled heterogeneous lookup for std::string keys in maps.
• Removed implicit conversion from StringPiece to std::string
• Fix use-after-destroy bug when the Map is allocated in the arena.
• Improved the randomness of map ordering
• Added stack overflow protection for text format with unknown fields
• Use std::hash for proto maps to help with portability.
• Added more Windows macros to proto whitelist.
• Arena constructors for map entry messages are now marked "explicit"
  (for regular messages they were already explicit).
• Fix subtle aliasing bug in RepeatedField::Add
• Fix mismatch between MapEntry ByteSize and Serialize with respect to unset
  fields.

Python

• JSON format conformance fixes:
  • Reject lowercase t for Timestamp json format.
  • Print full_name directly for extensions (no camelCase).
  • Reject boolean values for integer fields.
  • Reject NaN, Infinity, -Infinity that is not quoted.
  • Base64 fixes for bytes fields: accept URL-safe base64 and missing padding.
• Bugfix for fields/files named "async" or "await".
• Improved the error message when AttributeError is returned from getattr
  in EnumTypeWrapper.

Java

• Fixed a bug where setting optional proto3 enums with setFooValue() would
  not mark the value as present.
• Add Subtract function to FieldMaskUtil.

C

• Dropped support for netstandard1.0 (replaced by support for netstandard1.1).
  This was required to modernize the parsing stack to use the Span<byte>
  type internally. (#​7351)
• Add ParseFrom(ReadOnlySequence<byte>) method to enable GC friendly
  parsing with reduced allocations and buffer copies. (#​7351)
• Add support for serialization directly to a IBufferWriter<byte> or
  to a Span<byte> to enable GC friendly serialization.
  The new API is available as extension methods on the IMessage type. (#​7576)
• Add GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE define to make
  generated code compatible with old C# compilers (pre-roslyn compilers
  from .NET framework and old versions of mono) that do not support
  ref structs. Users that are still on a legacy stack that does
  not support C# 7.2 compiler might need to use the new define
  in their projects to be able to build the newly generated code. (#​7490)
• Due to the major overhaul of parsing and serialization internals (#​7351 and #​7576),
  it is recommended to regenerate your generated code to achieve the best
  performance (the legacy generated code will still work, but might incur
  a slight performance penalty).