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

goroutine 426 [running]:
DIAGNOSIS:
I0301 08:57:32.591983   65464 main.go:296] ***************************
I0301 08:57:32.592033   65464 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-1]
I0301 08:57:32.592067   65464 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 08:57:32.592085   65464 main.go:299] PID: 65464
I0301 08:57:32.592136   65464 main.go:300] UID: 0, GID: 0
I0301 08:57:32.592242   65464 main.go:301] Configuration:
I0301 08:57:32.592292   65464 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 08:57:32.592310   65464 main.go:303] 		Platform: kvm
I0301 08:57:32.592355   65464 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 08:57:32.592402   65464 main.go:305] 		Network: sandbox, logging: false
I0301 08:57:32.592441   65464 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 08:57:32.592473   65464 main.go:307] ***************************
D0301 08:57:32.592546   65464 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-1"
D0301 08:57:32.594457   65464 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-1": signal 0
D0301 08:57:32.594494   65464 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-1"
D0301 08:57:32.594509   65464 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-1"
D0301 08:57:32.594624   65464 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 08:57:32.884304   65464 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-1", PID: 53105
I0301 08:57:32.884370   65464 debug.go:131] Retrieving sandbox stacks
D0301 08:57:32.884390   65464 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-1"
D0301 08:57:32.884406   65464 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-1"
D0301 08:57:32.884464   65464 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 08:57:32.897951   65464 error.go:48] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0301 08:57:32.898091   65464 main.go:329] Failure to execute command, err: 1