logstash-forwarder crashing

gistfile1.txt

panic: done

goroutine 5 [running]:
main.func·001()
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:30 +0x6b
created by main.main
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:31 +0x13b

goroutine 1 [chan receive]:
main.Registrar(0xc2000b3700)
        /mnt/jenkins/workspace/Logstash-Forwarder/registrar.go:8 +0x43
main.main()
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:72 +0x3d4

goroutine 2 [syscall]:

goroutine 6 [sleep]:
time.Sleep(0x2540be400)
        /mnt/jenkins/gobrew/versions/1.1.2/src/pkg/runtime/ztime_linux_amd64.c:19 +0x2f
main.Prospect(0xc200093c40, 0x3, 0x4, 0xc200093c80, 0xc2000a9540, ...)
        /mnt/jenkins/workspace/Logstash-Forwarder/prospector.go:34 +0x335
created by main.main
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:63 +0x322

goroutine 7 [sleep]:
time.Sleep(0x2540be400)
        /mnt/jenkins/gobrew/versions/1.1.2/src/pkg/runtime/ztime_linux_amd64.c:19 +0x2f
main.Prospect(0x0, 0x0, 0x0, 0x0, 0xc2000a9540, ...)
        /mnt/jenkins/workspace/Logstash-Forwarder/prospector.go:34 +0x335
created by main.main
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:63 +0x322

goroutine 8 [select]:
main.Spool(0xc2000a9540, 0xc2000b3690, 0x400, 0x12a05f200)
        /mnt/jenkins/workspace/Logstash-Forwarder/spooler.go:26 +0x3fa
created by main.main
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:67 +0x38d

goroutine 9 [chan receive]:
main.Publishv1(0xc2000b3690, 0xc2000b3700, 0xc2000b35b0)
        /mnt/jenkins/workspace/Logstash-Forwarder/publisher1.go:42 +0xbb
created by main.main
        /mnt/jenkins/workspace/Logstash-Forwarder/logstash-forwarder.go:69 +0x3c1

goroutine 11 [sleep]:
time.Sleep(0x3b9aca00)
        /mnt/jenkins/gobrew/versions/1.1.2/src/pkg/runtime/ztime_linux_amd64.c:19 +0x2f
main.(*Harvester).readline(0xc20009b930, 0xc200078480, 0x2540be400, 0xba72ded4f, 0x0, ...)
        /mnt/jenkins/workspace/Logstash-Forwarder/harvester.go:127 +0xfa
main.(*Harvester).Harvest(0xc20009b930, 0xc2000a9540)
        /mnt/jenkins/workspace/Logstash-Forwarder/harvester.go:45 +0x2d7
created by main.resume_tracking
        /mnt/jenkins/workspace/Logstash-Forwarder/prospector.go:62 +0x3de

goroutine 12 [finalizer wait]: