Is -warn-concurrency working?

[ole (Ole Begemann)]

@bjhomer

Seems like we could document that better.

I agree.

@bjhomer

It's also not clear to me why some things are warnings and others are errors with -warn-concurrency enabled. Is there a guiding principle?

I don't know what exactly -warn-concurrency does. This recent post from @Douglas_Gregor seems somewhat related:

-warn-concurrency might not be the right name; it's applying stricter logic for concurrency-related checks across the entire module, not just in code that has "adopted concurrency."

If it's wrong, or if the errors are indeed not fixable, please file bugs so we can improve it!