Channel::OpenOpts::FromUri results in Access violation reading location 0x0000000000000000.

[TheYoungBeast]

 try
    {
        Channel::OpenOpts ret = Channel::OpenOpts::FromUri("amqp://guest:guest@localhost:5672/");
        auto channel = Channel::Open(ret);
    }
    catch (exception e) {
        std::wcout << e.what() << std::endl;
    }

I use the RabbitMQ server on docker. It works fine with other clients e.g. C# RabbitMq.Client. It is painful to make this client work... Above code results in the exception 'Access violation reading location 0x0000000000000000.'

// Windows 10, VS 2022 (mvsc 19)

[alanxz]

Could you provide a stacktrace at the point where it crashes?

As an observation: auto channel is a shared_ptr<> meaning when it goes out of scope, it is destructed. As such, if you want to use it outside of the try block, you'll need to declare it before you enter that try block.

[TheYoungBeast]

As an observation: auto channel is a shared_ptr<> meaning when it goes out of scope, it is destructed. As such, if you want to use it outside of the try block, you'll need to declare it before you enter that try block.

That is correct. However, as you can see channel is declared inside the try block and would not be accessible outside of that block.

@alanxz The exception occurs at: ucrtbased.dll in function strncmp()

strncmp() line 97:

[alanxz]

Could you build and run it using the debug configuration? It’d be helpful to see the functions in the stacktrace.

Also, which versions of SimpleAmqpClient and rabbitmq-c are you using?

-Alan

On Sat, Jun 24, 2023 at 6:54 AM Dominik Dominik @.***> wrote:

As an observation: auto channel is a shared_ptr<> meaning when it goes out of scope, it is destructed. As such, if you want to use it outside of the try block, you'll need to declare it before you enter that try block.

That is correct. However, as you can see channel is declared inside the try block and would not be accessible outside of that block.

@alanxz https://github.com/alanxz The exception occurs at: ucrtbased.dll in function strncmp() [image: obraz] https://user-images.githubusercontent.com/19922252/248464985-009c55c4-4a72-4c0b-984f-b701baa09f39.png

strncmp() line 97: [image: obraz] https://user-images.githubusercontent.com/19922252/248465163-a8801150-792a-4bab-8a04-e70ba9a7a29f.png

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