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

goroutine 503 [running]:
DIAGNOSIS:
I0301 15:12:02.205533   58095 main.go:296] ***************************
I0301 15:12:02.205596   58095 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 15:12:02.205669   58095 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 15:12:02.205695   58095 main.go:299] PID: 58095
I0301 15:12:02.205724   58095 main.go:300] UID: 0, GID: 0
I0301 15:12:02.205753   58095 main.go:301] Configuration:
I0301 15:12:02.205784   58095 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 15:12:02.205815   58095 main.go:303] 		Platform: kvm
I0301 15:12:02.205842   58095 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 15:12:02.205875   58095 main.go:305] 		Network: sandbox, logging: false
I0301 15:12:02.205909   58095 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 15:12:02.205944   58095 main.go:307] ***************************
D0301 15:12:02.206008   58095 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-3"
D0301 15:12:02.207721   58095 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-3": signal 0
D0301 15:12:02.207758   58095 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 15:12:02.207781   58095 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 15:12:02.207999   58095 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 15:12:02.448149   58095 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-3", PID: 52572
I0301 15:12:02.448203   58095 debug.go:131] Retrieving sandbox stacks
D0301 15:12:02.448238   58095 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 15:12:02.448271   58095 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 15:12:02.448355   58095 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 15:12:02.472338   58095 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 15:12:02.472502   58095 main.go:329] Failure to execute command, err: 1