panic: runtime error: index out of range [1] with length 0

goroutine 595 [running]:
DIAGNOSIS:
I0301 11:57:42.043513   59087 main.go:296] ***************************
I0301 11:57:42.043569   59087 main.go:297] Args: [/syzkaller/managers/kvm-direct-sandbox/current/image -root /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -network=sandbox debug -stacks --ps ci-gvisor-kvm-direct-sandbox-2]
I0301 11:57:42.043615   59087 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 11:57:42.043637   59087 main.go:299] PID: 59087
I0301 11:57:42.043660   59087 main.go:300] UID: 0, GID: 0
I0301 11:57:42.043681   59087 main.go:301] Configuration:
I0301 11:57:42.043703   59087 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 11:57:42.043723   59087 main.go:303] 		Platform: kvm
I0301 11:57:42.043770   59087 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 11:57:42.043805   59087 main.go:305] 		Network: sandbox, logging: false
I0301 11:57:42.043830   59087 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 11:57:42.043855   59087 main.go:307] ***************************
D0301 11:57:42.043936   59087 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-2"
D0301 11:57:42.045555   59087 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-2": signal 0
D0301 11:57:42.045599   59087 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0301 11:57:42.045622   59087 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0301 11:57:42.045735   59087 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 11:57:42.312144   59087 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-2", PID: 37901
I0301 11:57:42.312214   59087 debug.go:131] Retrieving sandbox stacks
D0301 11:57:42.312241   59087 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0301 11:57:42.312263   59087 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0301 11:57:42.312344   59087 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 11:57:42.339340   59087 error.go:48] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0301 11:57:42.339475   59087 main.go:329] Failure to execute command, err: 1