panic: runtime error: index out of range

DIAGNOSIS:
I0403 13:40:07.462922   46537 x:0] ***************************
I0403 13:40:07.462968   46537 x:0] Args: [/syzkaller/managers/ptrace-direct-overlay-host/current/image -root /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=host debug -stacks ci-gvisor-ptrace-direct-overlay-host-3]
I0403 13:40:07.462981   46537 x:0] Version release-20190304.1-78-gc4caccd54042
I0403 13:40:07.462985   46537 x:0] PID: 46537
I0403 13:40:07.462991   46537 x:0] UID: 0, GID: 0
I0403 13:40:07.462994   46537 x:0] Configuration:
I0403 13:40:07.462997   46537 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root
I0403 13:40:07.463000   46537 x:0] 		Platform: ptrace
I0403 13:40:07.463005   46537 x:0] 		FileAccess: shared, overlay: false
I0403 13:40:07.463011   46537 x:0] 		Network: host, logging: false
I0403 13:40:07.463019   46537 x:0] 		Strace: false, max size: 1024, syscalls: []
I0403 13:40:07.463023   46537 x:0] ***************************
D0403 13:40:07.463038   46537 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-3"
D0403 13:40:07.464513   46537 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-3": signal 0
D0403 13:40:07.464551   46537 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-3"
D0403 13:40:07.464557   46537 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-3"
D0403 13:40:07.464679   46537 x:0] urpc: successfully marshalled 118 bytes.
I0403 13:40:07.763313   46537 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-3", PID: 18156
I0403 13:40:07.763331   46537 x:0] Retrieving sandbox stacks
D0403 13:40:07.763335   46537 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-3"
D0403 13:40:07.763340   46537 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-3"
D0403 13:40:07.763385   46537 x:0] urpc: successfully marshalled 36 bytes.
W0403 13:40:07.802064   46537 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer