Unfortunately, there's no language-level help (yet...

# coroutines

[elizarov]

Unfortunately, there's no language-level help (yet) to identify and/or avoid the shared mutable stable. You have to manually keep track of what state you are sharing and manually do all your synchronization just like in Go using some kind of mutex or other synchronization primitive. So you better follow some disciplined development style with respect to coroutines and concurrency.