cannot stop debugger: "could not deliver signal: operation not permitted"

[bald2b]

on OS X go application cannot be completely stopped in debug mode by "stop" button
Yes, app is "stopped" in idea, but i see running go processes in memory

Idea console output:
/Users/bald/.gvm/gos/go1.5.2/bin/go build -o /private/var/folders/ys/pz3b29x14_zbzj9s39422pg80000gn/T/run14go -gcflags "-N -l" /Users/bald/projects/indriver.git/go-server/server/src/Main.go "/Users/bald/Library/Application Support/IntelliJIdea15/Go/lib/dlv/mac/dlv" --listen=localhost:64506 --headless=true exec /private/var/folders/ys/pz3b29x14_zbzj9s39422pg80000gn/T/run14go -- conf/bald.config.json could not deliver signal: operation not permitted

Result of ps ax|egrep '\(run14go)$' before start app (already 8 unused go processes)
1909 ?? Z 0:00.00 (run14go)
4801 ?? Z 0:00.00 (run14go)
4944 ?? Z 0:00.00 (run14go)
4992 ?? Z 0:00.00 (run14go)
5012 ?? Z 0:00.00 (run14go)
5086 ?? Z 0:00.00 (run14go)
5109 ?? Z 0:00.00 (run14go)
5137 ?? Z 0:00.00 (run14go)

after start and stop debug session there are 9 processes
1909 ?? Z 0:00.00 (run14go)
4801 ?? Z 0:00.00 (run14go)
4944 ?? Z 0:00.00 (run14go)
4992 ?? Z 0:00.00 (run14go)
5012 ?? Z 0:00.00 (run14go)
5086 ?? Z 0:00.00 (run14go)
5109 ?? Z 0:00.00 (run14go)
5137 ?? Z 0:00.00 (run14go)
5184 ?? Z 0:00.00 (run14go)

Idea 15.01
go plugin 0.10.749
go 1.5.2
java 1.8.
os x 10.11.1

app is simple web server like http.ListenAndServe("8080", router)

[dlsniper]

Hi, thanks for the really detailed bug report. Just to be complete, could you please add a small sample of a program that reproduces this? I'll pass this to @ignatov as I don't have a Mac to check it unfortunately. Thank you!

[bald2b]

Hi, sample of code

package main
import (
    "net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("hi"))
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8082", nil)
}

And i notice if stop debugger from breakpoint then app stopped ok

[zolotov]

@ignatov I think it's delve's bug. We don't run actual application, delve does. Also the first debug run/stop works fine, every other debug stopping produces could not deliver signal: operation not permitted or cannot resume process and leaves zombies after itself:

~  ᐅ ps ax|egrep 's.go'
31918   ??  Z      0:00.00 (Build s.go and r)
31958   ??  Z      0:00.00 (Build s.go and r)
31977   ??  Z      0:00.00 (Build s.go and r)
32004   ??  Z      0:00.00 (Build s.go and r)

Please investigate and forward to delve repo.

[dlsniper]

I think this was fixed in #2224 but I can't be 100% sure as I don't have a Mac (the description however fits the issue).