Crash during initialization in

[o-hainz]

Describe your environment I'm on a Windows Server 2022. I use Visual Studio 2022. For the build of the package I'm using vcpkg and there the latest version 2025.04.09 which contains the version 1.20.0 from the repository opentelemetry-cpp. Before we worked with an older version of opentelemetry-cpp and there it worked fine.

Steps to reproduce I create a small console application to reproduce it. Everything you need to reproduce is hopefully in this Zip-file:

OpenTelemetryCpp.zip

Here the steps you need to do:

• Extract the OpenTelemetryCpp.zip somewhere on your Windows PC.
• You will need a little bit of free disk space because VCPKG will need some space. I would estimate round about 50GB.
• In the root folder you will find the file prepare_project_folder.cmd. Please execute it in the root folder or do the following steps in the root folder:

git clone https://github.com/microsoft/vcpkg.git
git checkout tags/2025.04.09
cd vcpkg
cmd /C bootstrap-vcpkg.bat
vcpkg update
vcpkg install "opentelemetry-cpp[otlp-grpc,otlp-http]:x64-windows" --recurse
cd ..

• This will clone the vcpkg repository into the root folder and builds opentelemetry-cpp.
• This will take a some time.
• Now you should open the solution OpenTelemetryCpp.sln.
• Please use the configuration Debug/x86. The other ones are not configured.
• Build the solution.
• Run the project it in Debug/x86 mode.

You should get an error and the stack trace should like this:

 	ucrtbased.dll!00007ffb0e2a2fb5()	Unknown
 	ucrtbased.dll!00007ffb0e2a3153()	Unknown
 	ucrtbased.dll!00007ffb0e2bae2d()	Unknown
 	ucrtbased.dll!00007ffb0e2c1345()	Unknown
 	ucrtbased.dll!00007ffb0e2c0bd7()	Unknown
 	ucrtbased.dll!00007ffb0e2bebc8()	Unknown
 	ucrtbased.dll!00007ffb0e2c18af()	Unknown
>	OpenTelemetryCpp.exe!absl::otel_v1::variant_internal::VisitIndicesSwitch<15>::Run::__l4::<lambda_1>::operator()() Line 427	C++
 	OpenTelemetryCpp.exe!absl::otel_v1::variant_internal::VisitIndicesSwitch<15>::Run<absl::otel_v1::variant_internal::VariantStateBaseDestructorNontrivial<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>::Destroyer>(absl::otel_v1::variant_internal::VariantStateBaseDestructorNontrivial<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>::Destroyer && op, unsigned __int64 i) Line 427	C++
 	OpenTelemetryCpp.exe!absl::otel_v1::variant_internal::VariantStateBaseDestructorNontrivial<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>::destroy() Line 1316	C++
 	OpenTelemetryCpp.exe!absl::otel_v1::variant_internal::VariantStateBaseDestructorNontrivial<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>::~VariantStateBaseDestructorNontrivial<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>() Line 1318	C++
 	[External Code]	
 	OpenTelemetryCpp.exe!absl::otel_v1::variant<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>::~variant<bool,int,unsigned int,__int64,double,std::string,std::vector<bool,std::allocator<bool>>,std::vector<int,std::allocator<int>>,std::vector<unsigned int,std::allocator<unsigned int>>,std::vector<__int64,std::allocator<__int64>>,std::vector<double,std::allocator<double>>,std::vector<std::string,std::allocator<std::string>>,unsigned __int64,std::vector<unsigned __int64,std::allocator<unsigned __int64>>,std::vector<unsigned char,std::allocator<unsigned char>>>() Line 569	C++
 	[External Code]	
 	OpenTelemetryCpp.exe!opentelemetry::v1::sdk::resource::Resource::GetDefault() Line 63	C++
 	OpenTelemetryCpp.exe!opentelemetry::v1::sdk::resource::Resource::Create(const opentelemetry::v1::sdk::common::AttributeMap & attributes, const std::string & schema_url) Line 38	C++
 	OpenTelemetryCpp.exe!InitTracer() Line 99	C++
 	OpenTelemetryCpp.exe!main() Line 140	C++
 	[External Code]	

On the output of the console is this message:

Assertion failed: false && "i == variant_npos", file D:\Dev\Git\OpenTelemetryCpp\vcpkg\installed\x64-windows\include\opentelemetry\nostd\internal\absl\types\internal\variant.h, line 427

I think the issue starts in this function:

Resource &Resource::GetDefault()
{
  static Resource default_resource(
      {{semconv::telemetry::kTelemetrySdkLanguage, "cpp"},
       {semconv::telemetry::kTelemetrySdkName, "opentelemetry"},
       {semconv::telemetry::kTelemetrySdkVersion, OPENTELEMETRY_SDK_VERSION}},
      std::string{});
  return default_resource;
}

After all the application did not start.

What is the expected behavior? The application should start.

What is the actual behavior? The application did not start and reports the error.