panic: runtime error: index out of range

goroutine 184 [running]:
DIAGNOSIS:
I0330 02:20:43.658274   38568 x:0] ***************************
I0330 02:20:43.658414   38568 x:0] 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 -platform=ptrace -file-access=shared -network=sandbox debug -stacks ci-gvisor-ptrace-proxy-sandbox-race-0]
I0330 02:20:43.658478   38568 x:0] Git Revision: ed23f547093e705ba3d6f82b2ce49592180f9a5a
I0330 02:20:43.658499   38568 x:0] PID: 38568
I0330 02:20:43.658525   38568 x:0] UID: 0, GID: 0
I0330 02:20:43.658557   38568 x:0] Configuration:
I0330 02:20:43.658586   38568 x:0] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0330 02:20:43.658638   38568 x:0] 		Platform: ptrace
I0330 02:20:43.658670   38568 x:0] 		FileAccess: shared, overlay: false
I0330 02:20:43.658693   38568 x:0] 		Network: sandbox, logging: false
I0330 02:20:43.658732   38568 x:0] 		Strace: false, max size: 1024, syscalls: []
I0330 02:20:43.658791   38568 x:0] ***************************
D0330 02:20:43.658866   38568 x:0] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0330 02:20:43.665693   38568 x:0] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-0": signal 0
D0330 02:20:43.665809   38568 x:0] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0330 02:20:43.665841   38568 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0330 02:20:43.666298   38568 x:0] urpc: successfully marshalled 117 bytes.
I0330 02:20:43.782162   38568 x:0] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0", PID: 36212
I0330 02:20:43.782214   38568 x:0] Retrieving sandbox stacks
D0330 02:20:43.782234   38568 x:0] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0330 02:20:43.782269   38568 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
W0330 02:20:43.782353   38568 x:0] FATAL ERROR: retrieving stacks: connecting to control server at PID 36212: connection refused
retrieving stacks: connecting to control server at PID 36212: connection refused