[barrkel]

How do you convince every other library that you might sandwich on your call stack to use your error library so your error data gets passed through correctly?

[tptacek]

Well, at this point, don't you just wrap the error? Isn't that the point of this post?

[barrkel]

And stack trace in the middle?

[_ph_]

The other library doesn't have to use your error library, it just needs to preserve your error when passing through. To make this a common practise, this proposal was made.