Created in different context error

Hi all,

Everything has worked fine for ContextVarsScopeManager if I have only Fastapi application. But, When I tried to mount a Flask WSGIApplication to the Fastapi application, I've got an error from ContextVarsScopeManager as "<Token var=<ContextVar name='scope' at 0x7ff47d568a90> at 0x7ff47d61fe00> was created in a different Context". This error has been raised from after_request function of tracer.wrappers.fastapi.fastapi_wrapper module while trying to close scope. When I debugged the code, I have found out that "if token._var is not self" check into reset function of ContextVar class has caused this exception. I've created a sample project to reproduce the issue and shared it's Github url below.

Github url: https://github.com/gokhan721/opentracing_contextvar_work

Thanks.

Bắt đầu với ContextVarsScopeManager và hàm after_request trong tracer.wrappers.fastapi.fastapi_wrapper, sau đó tái hiện lỗi bằng dự án mẫu được liên kết, trong đó một ứng dụng Flask WSGI được mount trong FastAPI. Hoàn thành khi việc đóng scope không còn gây ra lỗi “created in a different Context” trong thiết lập đó.