Implement fibers?
I know you're hard at work with Paddy2, which will probably get rid of this issue, but here it goes anyway…

We're seeing a lot of crashes in Sketch, related to the use of `coscript.shouldKeepAround`, and Paddy 1 is usually involved. We believe the cause of the crash to be something like this:

- an action is dispatched and start a long running script using `coscript.shouldKeepAround = true`
- a second action is dispatched before the first one has finished. Because there is already a cocoascript context created by the first action, we will reuse it since it's the same command.
- the second action finishes before the first one (perhaps even synchronously), setting `coscript.shouldKeepAround = false`
- we clean up the context since it is not supposed to be kept around
- the first action finishes and crashes because there is no context since it is not leaking anymore

We added `fibers`a while ago, precisely to fix this type of issue (you can check the docs for the feature on https://developer.sketchapp.com/reference/api/#async)

Thanks in advance!