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

goroutine 192 [running]:
DIAGNOSIS:
I0301 10:56:23.535776   18802 main.go:296] ***************************
I0301 10:56:23.535842   18802 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-3]
I0301 10:56:23.535932   18802 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 10:56:23.535967   18802 main.go:299] PID: 18802
I0301 10:56:23.535993   18802 main.go:300] UID: 0, GID: 0
I0301 10:56:23.536015   18802 main.go:301] Configuration:
I0301 10:56:23.536041   18802 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 10:56:23.536080   18802 main.go:303] 		Platform: kvm
I0301 10:56:23.536115   18802 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 10:56:23.536175   18802 main.go:305] 		Network: sandbox, logging: false
I0301 10:56:23.536212   18802 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 10:56:23.536240   18802 main.go:307] ***************************
D0301 10:56:23.536312   18802 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-3"
D0301 10:56:23.538042   18802 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-3": signal 0
D0301 10:56:23.538082   18802 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 10:56:23.538113   18802 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 10:56:23.538260   18802 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 10:56:23.792149   18802 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-3", PID: 1461
I0301 10:56:23.792224   18802 debug.go:131] Retrieving sandbox stacks
D0301 10:56:23.792267   18802 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 10:56:23.792295   18802 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 10:56:23.792376   18802 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 10:56:23.828867   18802 error.go:48] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0301 10:56:23.829020   18802 main.go:329] Failure to execute command, err: 1