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

goroutine 1455511 [running]:
encoding/binary.littleEndian.Uint16(...)
DIAGNOSIS:
I0304 23:16:07.637575   33122 main.go:305] ***************************
I0304 23:16:07.637707   33122 main.go:306] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-3]
I0304 23:16:07.637877   33122 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0304 23:16:07.637977   33122 main.go:308] PID: 33122
I0304 23:16:07.638093   33122 main.go:309] UID: 0, GID: 0
I0304 23:16:07.638204   33122 main.go:310] Configuration:
I0304 23:16:07.638256   33122 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0304 23:16:07.638334   33122 main.go:312] 		Platform: ptrace
I0304 23:16:07.638407   33122 main.go:313] 		FileAccess: shared, overlay: false
I0304 23:16:07.638497   33122 main.go:314] 		Network: sandbox, logging: false
I0304 23:16:07.638571   33122 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0304 23:16:07.638660   33122 main.go:316] ***************************
W0304 23:16:07.638721   33122 main.go:321] Block the TERM signal. This is only safe in tests!
D0304 23:16:07.638934   33122 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0304 23:16:07.646141   33122 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-3": signal 0
D0304 23:16:07.646321   33122 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0304 23:16:07.646415   33122 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0304 23:16:07.646886   33122 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0304 23:16:10.077687   33122 debug.go:122] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3", PID: 57918
I0304 23:16:10.077869   33122 debug.go:131] Retrieving sandbox stacks
D0304 23:16:10.078017   33122 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0304 23:16:10.078143   33122 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
W0304 23:16:10.078349   33122 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 57918: connection refused
retrieving stacks: connecting to control server at PID 57918: connection refused
W0304 23:16:10.078700   33122 main.go:338] Failure to execute command, err: 1