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

goroutine 296338 [running]:
DIAGNOSIS:
I0303 22:14:56.369512   27489 main.go:296] ***************************
I0303 22:14:56.369591   27489 main.go:297] Args: [/syzkaller/managers/kvm-proxy-overlay-sandbox/current/image -root /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -overlay -network=sandbox debug -stacks --ps ci-gvisor-kvm-proxy-overlay-sandbox-3]
I0303 22:14:56.369638   27489 main.go:298] Version release-20200219.0-52-gabf7ebcd38e8
I0303 22:14:56.369659   27489 main.go:299] PID: 27489
I0303 22:14:56.369680   27489 main.go:300] UID: 0, GID: 0
I0303 22:14:56.369699   27489 main.go:301] Configuration:
I0303 22:14:56.369719   27489 main.go:302] 		RootDir: /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root
I0303 22:14:56.369742   27489 main.go:303] 		Platform: kvm
I0303 22:14:56.369761   27489 main.go:304] 		FileAccess: exclusive, overlay: true
I0303 22:14:56.369802   27489 main.go:305] 		Network: sandbox, logging: false
I0303 22:14:56.369824   27489 main.go:306] 		Strace: false, max size: 1024, syscalls: []
I0303 22:14:56.369854   27489 main.go:307] ***************************
D0303 22:14:56.369902   27489 container.go:158] Load container "/syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0303 22:14:56.371283   27489 container.go:591] Signal container "ci-gvisor-kvm-proxy-overlay-sandbox-3": signal 0
D0303 22:14:56.371319   27489 sandbox.go:788] Signal sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0303 22:14:56.371332   27489 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0303 22:14:56.371472   27489 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0303 22:14:56.940170   27489 debug.go:122] Found sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3", PID: 10298
I0303 22:14:56.940228   27489 debug.go:131] Retrieving sandbox stacks
D0303 22:14:56.940250   27489 sandbox.go:906] Stacks sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0303 22:14:56.940265   27489 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3"
D0303 22:14:56.940349   27489 urpc.go:534] urpc: successfully marshalled 36 bytes.
W0303 22:14:57.011085   27489 error.go:48] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0303 22:14:57.011435   27489 main.go:329] Failure to execute command, err: 1