afl-cov is not working with coroutines

[PiotrConclusive]

Hi, I've encountered an issue with code coverage in C++ code that uses coroutines. Here is a repository with a demo on how to reproduce the described situation:

https://github.com/PiotrConclusive/afl-cov-coroutines/tree/master

I've been using afl-g++ in a Docker environment provided by the afl project:
https://github.com/AFLplusplus/AFLplusplus/blob/stable/Dockerfile

In the repository, there is an attached report at https://github.com/PiotrConclusive/afl-cov-coroutines/blob/master/aflOut/cov/web/index.html, where you can see that some lines in coroutine functions appear white.

[ratagupt]

@mrash : Can you throw some light here, We are also hitting the similar problem.