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

goroutine 281 [running]:
DIAGNOSIS:
I0301 16:22:51.733288   37132 main.go:296] ***************************
I0301 16:22:51.733350   37132 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 16:22:51.733420   37132 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0301 16:22:51.733448   37132 main.go:299] PID: 37132
I0301 16:22:51.733476   37132 main.go:300] UID: 0, GID: 0
I0301 16:22:51.733500   37132 main.go:301] Configuration:
I0301 16:22:51.733523   37132 main.go:302] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0301 16:22:51.733550   37132 main.go:303] 		Platform: kvm
I0301 16:22:51.733575   37132 main.go:304] 		FileAccess: exclusive, overlay: false
I0301 16:22:51.733630   37132 main.go:305] 		Network: sandbox, logging: false
I0301 16:22:51.733752   37132 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0301 16:22:51.733816   37132 main.go:307] ***************************
D0301 16:22:51.733901   37132 container.go:158] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-0"
D0301 16:22:51.735679   37132 container.go:591] Signal container "ci-gvisor-kvm-direct-sandbox-0": signal 0
D0301 16:22:51.735733   37132 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 16:22:51.735753   37132 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 16:22:51.735923   37132 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0301 16:22:51.924111   37132 debug.go:122] Found sandbox "ci-gvisor-kvm-direct-sandbox-0", PID: 32215
I0301 16:22:51.924183   37132 debug.go:131] Retrieving sandbox stacks
D0301 16:22:51.924223   37132 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 16:22:51.924240   37132 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0301 16:22:51.924312   37132 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0301 16:22:51.942642   37132 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 16:22:51.942774   37132 main.go:329] Failure to execute command, err: 1