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

goroutine 754 [running]:
DIAGNOSIS:
I0301 14:39:20.581563   63284 main.go:296] ***************************
I0301 14:39:20.581635   63284 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-0]
I0301 14:39:20.581682   63284 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 14:39:20.581708   63284 main.go:299] PID: 63284
I0301 14:39:20.581740   63284 main.go:300] UID: 0, GID: 0
I0301 14:39:20.581767   63284 main.go:301] Configuration:
I0301 14:39:20.581799   63284 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 14:39:20.581828   63284 main.go:303] 		Platform: kvm
I0301 14:39:20.581909   63284 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 14:39:20.581949   63284 main.go:305] 		Network: sandbox, logging: false
I0301 14:39:20.581976   63284 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 14:39:20.582002   63284 main.go:307] ***************************
D0301 14:39:20.582069   63284 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-0"
D0301 14:39:20.583536   63284 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-0": signal 0
D0301 14:39:20.583574   63284 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 14:39:20.583597   63284 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 14:39:20.583739   63284 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 14:39:20.924135   63284 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-0", PID: 62837
I0301 14:39:20.924201   63284 debug.go:131] Retrieving sandbox stacks
D0301 14:39:20.924310   63284 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 14:39:20.924340   63284 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 14:39:20.924420   63284 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 14:39:20.940970   63284 error.go:48] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0301 14:39:20.941101   63284 main.go:329] Failure to execute command, err: 1