[Bug] SuspendApp freezes app on System.exit

[alexandru]

import arrow.continuations.SuspendApp

fun main(args: Array<String>) =
    SuspendApp {
        System.exit(1)
    }

This main completely freezes the process, needing an external SIGKILL to stop.

Maybe I'm doing something wrong, and also I realize that System.exit inside SuspendApp's passed-in closure may be a bad idea, but this isn't necessarily under the user's control.

[alexandru]

Unfortunately, I don't think this behaviour can be fixed, as it may in fact work as intended (not 100% sure).

System.exit blocks until runtime hooks complete. This creates a deadlock, because SuspendApp installs a shutdown hook that blocks until SuspendApp is done cleaning up resources.

But if this is true, then there's no way to exit main with a certain exit code.