Build failure: protobuf_29 on Darwin

[al3xtjames]

Nixpkgs version

• Unstable (25.11)

Steps to reproduce

1. nix build 'github:NixOS/nixpkgs/nixpkgs-unstable#protobuf_29' --rebuild

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/build/313434089

Relevant log output

[ RUN      ] EditionMessageTest.ParseFromFileDescriptor
F0000 00:00:1763111900.108041 156907717 message_unittest.inc:152] Check failed: File::SetContents( filename, expected_message.SerializeAsString(), true) is OK (INTERNAL: fopen(/private/tmp/nix-build-protobuf-29.5.drv-0/protobuf_tempdir/golden_message, "wb"): No such file or directory) 
*** Check failure stack trace: ***
    @        0x103eea5b4  absl::lts_20240722::log_internal::LogMessage::SendToLog()
    @        0x103ee9cc4  absl::lts_20240722::log_internal::LogMessage::Flush()
    @        0x103eeaa30  absl::lts_20240722::log_internal::LogMessageFatal::~LogMessageFatal()
    @        0x103eeaa48  absl::lts_20240722::log_internal::LogMessageFatal::~LogMessageFatal()
    @        0x1026a0c60  google::protobuf::EditionMessageTest_ParseFromFileDescriptor_Test::TestBody()
    @        0x104fb5a88  testing::internal::HandleExceptionsInMethodIfSupported<>()
    @        0x104fb590c  testing::Test::Run()
    @        0x104fb7028  testing::TestInfo::Run()
    @        0x104fb84ec  testing::TestSuite::Run()
    @        0x104fcd7a8  testing::internal::UnitTestImpl::RunAllTests()
    @        0x104fccefc  testing::internal::HandleExceptionsInMethodIfSupported<>()
    @        0x104fccdc8  testing::UnitTest::Run()
    @        0x103e27920  main
    @        0x196e6ab98  start

Additional context

EditionMessageTest.ParseFromFileDescriptor uses the TempDirDeleter class to allocate a temporary directory: https://github.com/protocolbuffers/protobuf/blob/f5de0a0495faa63b4186fc767324f8b9a7bf4fc4/src/google/protobuf/message_unittest.inc#L148

Its destructor cleans up the temporary directory once it is no longer needed: https://github.com/protocolbuffers/protobuf/blob/996e04c5efe88c2f12317e70957931ad5211f128/src/google/protobuf/testing/googletest.cc#L120-L124

Based on the logs from the test failure, it's almost as if the temporary directory is getting deleted before File::SetContents has a chance to create a file in it: https://github.com/protocolbuffers/protobuf/blob/f5de0a0495faa63b4186fc767324f8b9a7bf4fc4/src/google/protobuf/message_unittest.inc#L151-L152

I'm not sure why the destructor would get invoked in the first place, but removing the cleanup code from the destructor allows the test to pass: al3xtjames@6e33b74

I also can't reproduce this failure with other versions of protobuf. It affects both aarch64-darwin and x86_64-darwin.

System metadata

• system: "aarch64-darwin"
• host os: Darwin 24.6.0, macOS 15.7.2
• multi-user?: yes
• sandbox: no
• version: nix-env (Lix, like Nix) 2.93.3 System type: aarch64-darwin Additional system types: x86_64-darwin Features: gc, signed-caches System configuration file: /etc/nix/nix.conf User configuration files: /Users/alex/.config/nix/nix.conf:/Users/alex/.nix-profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/alex/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf Store directory: /nix/store State directory: /nix/var/nix Data directory: /nix/store/4zal8hz11pah1lk6rxk2524nx96nydic-lix-2.93.3/share
• nixpkgs: /nix/store/sa57k6i9qkwnrdnnih3wmgn78dr0ak36-source

Notify maintainers

@GaetanLepage

---

Note for maintainers: Please tag this issue in your pull request description. (i.e. Resolves #ISSUE.)

I assert that this issue is relevant for Nixpkgs

• I assert that this is a bug and not a support request.
• I assert that this is not a duplicate of an existing issue.
• I assert that I have read the NixOS Code of Conduct and agree to abide by it.

Is this issue important to you?

Add a 👍 reaction to issues you find important.