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

goroutine 470 [running]:
DIAGNOSIS:
I0301 16:52:33.788144   45078 main.go:296] ***************************
I0301 16:52:33.788206   45078 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 16:52:33.788256   45078 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 16:52:33.788282   45078 main.go:299] PID: 45078
I0301 16:52:33.788307   45078 main.go:300] UID: 0, GID: 0
I0301 16:52:33.788340   45078 main.go:301] Configuration:
I0301 16:52:33.788366   45078 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 16:52:33.788399   45078 main.go:303] 		Platform: kvm
I0301 16:52:33.788440   45078 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 16:52:33.788481   45078 main.go:305] 		Network: sandbox, logging: false
I0301 16:52:33.788507   45078 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 16:52:33.788529   45078 main.go:307] ***************************
D0301 16:52:33.788587   45078 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-3"
D0301 16:52:33.790047   45078 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-3": signal 0
D0301 16:52:33.790083   45078 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 16:52:33.790107   45078 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 16:52:33.790246   45078 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 16:52:34.012281   45078 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-3", PID: 21379
I0301 16:52:34.012346   45078 debug.go:131] Retrieving sandbox stacks
D0301 16:52:34.012373   45078 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 16:52:34.012390   45078 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0301 16:52:34.012450   45078 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 16:52:34.027903   45078 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 16:52:34.028074   45078 main.go:329] Failure to execute command, err: 1