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

goroutine 3386992 [running]:
encoding/binary.littleEndian.Uint16(...)
DIAGNOSIS:
I0303 18:00:21.899032    7402 main.go:305] ***************************
I0303 18:00:21.899092    7402 main.go:306] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=none debug -stacks --ps ci-gvisor-main-2]
I0303 18:00:21.899143    7402 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0303 18:00:21.899172    7402 main.go:308] PID: 7402
I0303 18:00:21.899206    7402 main.go:309] UID: 0, GID: 0
I0303 18:00:21.899234    7402 main.go:310] Configuration:
I0303 18:00:21.899261    7402 main.go:311] 		RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0303 18:00:21.899298    7402 main.go:312] 		Platform: ptrace
I0303 18:00:21.899349    7402 main.go:313] 		FileAccess: shared, overlay: false
I0303 18:00:21.899390    7402 main.go:314] 		Network: none, logging: false
I0303 18:00:21.899420    7402 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0303 18:00:21.899449    7402 main.go:316] ***************************
D0303 18:00:21.899516    7402 container.go:159] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-2"
D0303 18:00:21.901349    7402 container.go:592] Signal container "ci-gvisor-main-2": signal 0
D0303 18:00:21.901825    7402 sandbox.go:806] Signal sandbox "ci-gvisor-main-2"
D0303 18:00:21.901841    7402 sandbox.go:318] Connecting to sandbox "ci-gvisor-main-2"
D0303 18:00:21.902001    7402 urpc.go:534] urpc: successfully marshalled 96 bytes.
I0303 18:00:23.496560    7402 debug.go:122] Found sandbox "ci-gvisor-main-2", PID: 31927
I0303 18:00:23.496615    7402 debug.go:131] Retrieving sandbox stacks
D0303 18:00:23.497376    7402 sandbox.go:924] Stacks sandbox "ci-gvisor-main-2"
D0303 18:00:23.497408    7402 sandbox.go:318] Connecting to sandbox "ci-gvisor-main-2"
W0303 18:00:23.497449    7402 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 31927: connection refused
retrieving stacks: connecting to control server at PID 31927: connection refused
W0303 18:00:23.497618    7402 main.go:338] Failure to execute command, err: 1