Daemon fiber doesn't cleanup on program exit #7907
Description
Usecase
I have a background process (fiber) that can be stopped between deployments. To track the status of the process, I'd like log its termination.
Sample code
//> using scala "2.13.10"
//> using dep "dev.zio::zio:2.0.10"
import zio._
object Main extends ZIOAppDefault {
def track[R, E, A](tag: String)(zio: ZIO[R, E, A]): ZIO[R with Scope, E, A] =
zio
.onInterrupt(ZIO.debug(s"$tag Interrupt"))
.onExit(exit => ZIO.debug((s"$tag Exit", exit)))
.tapErrorCause(cause => ZIO.debug((s"$tag Error", cause)))
// .withFinalizer(_ => ZIO.debug(s"$tag Finalizer")) // Adding this makes scala-cli hang
val task =
ZIO.debug("Running...")
.repeat(Schedule.fixed(1.seconds) && Schedule.recurs(5))
val run =
track("Outer") {
for {
_ <- track("Inner")(task).fork
_ <- track("Daemon")(task).forkDaemon
_ <- ZIO.never
} yield ()
}
}
Steps to reproduce
$ scala-cli https://gist.github.com/guersam/96f51168a7bc1581c67094c5e2651264- Stop the process using
Ctrl + Cwithin 10 seconds
Expected result
"Inner", "Outer", "Daemon" fibers log some combinations of "Interrupt", "Exit", "Error", "Finalizer"
Actual result
"Inner" and "Outer" tasks log about interrupt, but "Daemon" doesn't.
Running...
Running...
Running...
^COuter Interrupt
Inner Interrupt
(Inner Exit,Failure(Then(Then(Interrupt(Runtime(4,1678276602161,),Stack trace for thread "zio-fiber-":
),Interrupt(Runtime(4,1678276602161,),Stack trace for thread "zio-fiber-":
)),Interrupt(Runtime(4,1678276602161,),Stack trace for thread "zio-fiber-":
))))
(Outer Exit,Failure(Then(Interrupt(Runtime(3,1678276602159,),Stack trace for thread "zio-fiber-3":
),Interrupt(Runtime(3,1678276602159,),Stack trace for thread "zio-fiber-3":
))))