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

DIAGNOSIS:
I0301 17:24:50.407200   48502 main.go:296] ***************************
I0301 17:24:50.407263   48502 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 17:24:50.407313   48502 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 17:24:50.407340   48502 main.go:299] PID: 48502
I0301 17:24:50.407379   48502 main.go:300] UID: 0, GID: 0
I0301 17:24:50.407405   48502 main.go:301] Configuration:
I0301 17:24:50.407444   48502 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 17:24:50.407485   48502 main.go:303] 		Platform: kvm
I0301 17:24:50.407513   48502 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 17:24:50.407552   48502 main.go:305] 		Network: sandbox, logging: false
I0301 17:24:50.407585   48502 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 17:24:50.407614   48502 main.go:307] ***************************
D0301 17:24:50.407674   48502 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-0"
D0301 17:24:50.409355   48502 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-0": signal 0
D0301 17:24:50.409390   48502 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 17:24:50.409435   48502 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 17:24:50.409765   48502 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 17:24:50.600188   48502 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-0", PID: 43447
I0301 17:24:50.600252   48502 debug.go:131] Retrieving sandbox stacks
D0301 17:24:50.600315   48502 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 17:24:50.600354   48502 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 17:24:50.600437   48502 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 17:24:50.616621   48502 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 17:24:50.616748   48502 main.go:329] Failure to execute command, err: 1