Python runtime 4.21.10 not works generated code can not load valid proto.

[ChameleonRed]

What version of protobuf and what language are you using?
Version: 4.21.10
Language: Python

What operating system (Linux, Windows, ...) and version?
Windows

What runtime / compiler are you using (e.g., python version or gcc version)
3.10.8

What did you do?
Same steps like here:
#10686

What did you expect to see
No problems with loading.

What did you see instead?

# -*- coding: utf-8 -*-
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: etcd/api/versionpb/version.proto
"""Generated protocol buffer code."""
from google.protobuf.internal import builder as _builder
from google.protobuf import descriptor as _descriptor
from google.protobuf import descriptor_pool as _descriptor_pool
from google.protobuf import symbol_database as _symbol_database
# @@protoc_insertion_point(imports)

_sym_db = _symbol_database.Default()


from gogoproto import gogo_pb2 as gogoproto_dot_gogo__pb2
from google.protobuf import descriptor_pb2 as google_dot_protobuf_dot_descriptor__pb2


DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n etcd/api/versionpb/version.proto\x12\tversionpb\x1a\x14gogoproto/gogo.proto\x1a google/protobuf/descriptor.proto:>\n\x10\x65tcd_version_msg\x12\x1f.google.protobuf.MessageOptions\x18\xd0\x86\x03 \x01(\t\x88\x01\x01:>\n\x12\x65tcd_version_field\x12\x1d.google.protobuf.FieldOptions\x18\xd1\x86\x03 \x01(\t\x88\x01\x01:<\n\x11\x65tcd_version_enum\x12\x1c.google.protobuf.EnumOptions\x18\xd2\x86\x03 \x01(\t\x88\x01\x01:G\n\x17\x65tcd_version_enum_value\x12!.google.protobuf.EnumValueOptions\x18\xd3\x86\x03 \x01(\t\x88\x01\x01\x42\x08\xc8\xe2\x1e\x01\xd0\xe2\x1e\x01\x62\x06proto3')

  File "C:\Users\Cezary Wagner\PycharmProjects\medptr-v2\src\etcd3_grpc\grpc\etcd\api\versionpb\version_pb2.py", line 18, in <module>
    DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n etcd/api/versionpb/version.proto\x12\tversionpb\x1a\x14gogoproto/gogo.proto\x1a google/protobuf/descriptor.proto:>\n\x10\x65tcd_version_msg\x12\x1f.google.protobuf.MessageOptions\x18\xd0\x86\x03 \x01(\t\x88\x01\x01:>\n\x12\x65tcd_version_field\x12\x1d.google.protobuf.FieldOptions\x18\xd1\x86\x03 \x01(\t\x88\x01\x01:<\n\x11\x65tcd_version_enum\x12\x1c.google.protobuf.EnumOptions\x18\xd2\x86\x03 \x01(\t\x88\x01\x01:G\n\x17\x65tcd_version_enum_value\x12!.google.protobuf.EnumValueOptions\x18\xd3\x86\x03 \x01(\t\x88\x01\x01\x42\x08\xc8\xe2\x1e\x01\xd0\xe2\x1e\x01\x62\x06proto3')
TypeError: Couldn't build proto file into descriptor pool: field with proto3_optional was not in a oneof (versionpb.etcd_version_msg)

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment

[haberman]

This was previously fixed in protocolbuffers/upb#820, but the fix has not been backported to the release branch.

[haberman]

This fix has been backported and will be released shortly.

[vishaldhanani]

@haberman, Is there any particular timeline to release new versions with fixes for python?

[ChameleonRed]

@haberman Can you figure out deadline? I waiting for it months so your fix will be welcome.

[haberman]

This fix was released in 4.21.12, released on December 14: https://github.com/protocolbuffers/protobuf/releases/tag/v21.12

Are you still getting this error with 4.21.12?

[ChameleonRed]

I will try in next 1-4 weeks ...