In fact, there is a promise on backwards compatibi...

# coroutines

[elizarov]

In fact, there is a promise on backwards compatibility. “Coroutines are experimental” means that we can add stuff (so that code compiled with 1.1.4 may not work under an older runtime, for example), but we promise not to remove stuff (so code compiled under 1.1.4 will continue to work in future updates).