ci: macos bazel python routing test failed (deadlock)

[Mizux]

All in the title...

trace:

bazel test --test_output=errors //ortools/routing/samples:vrp_py3  
...
FAIL: //ortools/routing/samples:vrp_py3 (Aborted) (see /private/var/tmp/_bazel_corentinl/f1516bbdb87ba8650c9a94a97e138e4b/execroot/_main/bazel-out/darwin_arm64-fastbuild/testlogs/ortools/routing/samples/vrp_py3/test.log)
INFO: From Testing //ortools/routing/samples:vrp_py3:
==================== Test output for //ortools/routing/samples:vrp_py3:
[mutex.cc : 1425] RAW: Potential Mutex deadlock: 
	@ 0x10dd682d0 absl::lts_20260107::DebugOnlyDeadlockCheck()
	@ 0x10dd681fc absl::lts_20260107::Mutex::lock()
	@ 0x10d9b8168 absl::lts_20260107::MutexLock::MutexLock()
	@ 0x10d9b42f0 absl::lts_20260107::MutexLock::MutexLock()
	@ 0x10db43ec4 absl::lts_20260107::MutexLock::MutexLock()
	@ 0x10dcbf5a4 google::protobuf::internal::OnShutdownRun()
	@ 0x10d9ea000 google::protobuf::internal::OnShutdownDelete<>()
	@ 0x118edc35c google::protobuf::DescriptorPool::GetFeatureSetDefaults()
	@ 0x118ee2f78 google::protobuf::DescriptorBuilder::BuildFileImpl()
	@ 0x118edb684 google::protobuf::DescriptorBuilder::BuildFile()
	@ 0x118edb8b0 google::protobuf::DescriptorPool::BuildFileFromDatabase()::$_0::operator()()
	@ 0x118eceae4 google::protobuf::DescriptorPool::BuildFileFromDatabase()
	@ 0x118ecaed8 google::protobuf::DescriptorPool::TryFindFileInFallbackDatabase()
	@ 0x118ecacf0 google::protobuf::DescriptorPool::FindFileByName()
	@ 0x119060708 google::protobuf::(anonymous namespace)::AssignDescriptorsImpl()
	@ 0x119060544 google::protobuf::internal::AssignDescriptorsOnceInnerCall()
	@ 0x1190bd91c google::protobuf::Message::GetMetadataImpl()::$_0::operator()()
	@ 0x1190bd8f4 std::__1::__invoke[abi:nqe210106]<>()
	@ 0x1190bd8d0 std::__1::invoke[abi:nqe210106]<>()
	@ 0x1190bd838 absl::lts_20260107::base_internal::CallOnceImpl<>()
	@ 0x1190b2644 absl::lts_20260107::call_once<>()
	@ 0x1190b25c4 google::protobuf::Message::GetMetadataImpl()
	@ 0x118a794e0 operations_research::routing::RoutingSearchParameters_LocalSearchNeighborhoodOperators::GetMetadata()
	@ 0x116c1d9ec operations_research::routing::RoutingSearchParameters_LocalSearchNeighborhoodOperators::GetReflection()
	@ 0x118a66754 operations_research::routing::FindErrorsInRoutingSearchParameters()
	@ 0x118a66670 operations_research::routing::FindErrorInRoutingSearchParameters()
	@ 0x118a65cd8 operations_research::routing::(anonymous namespace)::CreateDefaultRoutingSearchParameters()
	@ 0x118a6553c operations_research::routing::DefaultRoutingSearchParameters()
	@ 0x1169d2ff8 operations_research::routing::Model::Model()
	@ 0x1169d3a48 operations_research::routing::Model::Model()
	@ 0x1169d39e0 operations_research::routing::Model::Model()
	@ 0x1167cbf6c pybind11_init_routing()::$_8::operator()()
	@ 0x1167cbec0 pybind11::detail::initimpl::factory<>::execute<>()::{lambda()#1}::operator()()
	@ 0x1167cbe88 pybind11::detail::argument_loader<>::call_impl<>()
	@ 0x1167cba90 pybind11::detail::argument_loader<>::call<>()
	@ 0x1167cb924 pybind11::cpp_function::initialize<>()::{lambda()#1}::operator()()
	@ 0x1167cb808 pybind11::cpp_function::initialize<>()::{lambda()#1}::__invoke()
	@ 0x116761a8c pybind11::cpp_function::dispatcher()
	@ 0x1063d4524 cfunction_call
	@ 0x106175398 _PyObject_MakeTpCall

[mutex.cc : 1437] RAW: Acquiring absl::Mutex 0x105442ee8 while holding  0x105442ee8; a cycle in the historical lock ordering graph has been observed
[mutex.cc : 1438] RAW: Cycle: 
[mutex.cc : 1452] RAW: mutex@0x105442ee8 stack: 
	@ 0x10dd682d0 absl::lts_20260107::DebugOnlyDeadlockCheck()
	@ 0x10dd681fc absl::lts_20260107::Mutex::lock()
	@ 0x10d9b8168 absl::lts_20260107::MutexLock::MutexLock()
	@ 0x10d9b42f0 absl::lts_20260107::MutexLock::MutexLock()
	@ 0x10db43ec4 absl::lts_20260107::MutexLock::MutexLock()
	@ 0x10dcbf5a4 google::protobuf::internal::OnShutdownRun()
	@ 0x10dc541ac google::protobuf::internal::OnShutdownDelete<>()
	@ 0x10dc443ec google::protobuf::internal::(anonymous namespace)::Register()
	@ 0x10dc44850 google::protobuf::internal::ExtensionSet::RegisterMessageExtension()
	@ 0x10d9ea584 google::protobuf::DescriptorBuilder::DescriptorBuilder()
	@ 0x10d9ea870 google::protobuf::DescriptorBuilder::DescriptorBuilder()
	@ 0x10d9e8d8c google::protobuf::DescriptorBuilder::New()
	@ 0x10d9e9448 google::protobuf::DescriptorPool::BuildFileFromDatabase()::$_0::operator()()
	@ 0x10d9dbc3c google::protobuf::DescriptorPool::BuildFileFromDatabase()
	@ 0x10d9d7dd8 google::protobuf::DescriptorPool::TryFindFileInFallbackDatabase()
	@ 0x10d9d7bf0 google::protobuf::DescriptorPool::FindFileByName()
	@ 0x10db8cfcc google::protobuf::(anonymous namespace)::AssignDescriptorsImpl()
	@ 0x10db8ce08 google::protobuf::internal::AssignDescriptorsOnceInnerCall()
	@ 0x10dbf0b24 google::protobuf::Message::GetMetadataImpl()::$_0::operator()()
	@ 0x10dbf0afc std::__1::__invoke[abi:nqe210106]<>()
	@ 0x10dbf0ad8 std::__1::invoke[abi:nqe210106]<>()
	@ 0x10dbf0a40 absl::lts_20260107::base_internal::CallOnceImpl<>()
	@ 0x10dbe5804 absl::lts_20260107::call_once<>()
	@ 0x10dbe5784 google::protobuf::Message::GetMetadataImpl()
	@ 0x10dacdb94 google::protobuf::DescriptorProto::GetMetadata()
	@ 0x10da2b850 google::protobuf::DescriptorProto::GetDescriptor()
	@ 0x10d9d7918 google::protobuf::DescriptorProto::descriptor()
	@ 0x118eca9f8 google::protobuf::DescriptorPool::generated_pool()
	@ 0x119060588 google::protobuf::(anonymous namespace)::MaybeInitializeLazyDescriptors()
	@ 0x119060530 google::protobuf::internal::AssignDescriptorsOnceInnerCall()
	@ 0x1190bd91c google::protobuf::Message::GetMetadataImpl()::$_0::operator()()
	@ 0x1190bd8f4 std::__1::__invoke[abi:nqe210106]<>()
	@ 0x1190bd8d0 std::__1::invoke[abi:nqe210106]<>()
	@ 0x1190bd838 absl::lts_20260107::base_internal::CallOnceImpl<>()
	@ 0x1190b2644 absl::lts_20260107::call_once<>()
	@ 0x1190b25c4 google::protobuf::Message::GetMetadataImpl()
	@ 0x118a794e0 operations_research::routing::RoutingSearchParameters_LocalSearchNeighborhoodOperators::GetMetadata()
	@ 0x116c1d9ec operations_research::routing::RoutingSearchParameters_LocalSearchNeighborhoodOperators::GetReflection()
	@ 0x118a66754 operations_research::routing::FindErrorsInRoutingSearchParameters()
	@ 0x118a66670 operations_research::routing::FindErrorInRoutingSearchParameters()

[mutex.cc : 1460] RAW: dying due to potential deadlock
================================================================================

[lperron]

it is an ODR (dual link)

[Mizux]

yup pretty sure is related to:

• pybind_extension linkage is problematic for projects with multiple pybind modules pybind/pybind11_bazel#125