panic: runtime error: index out of range

goroutine 2169277 [running]:
DIAGNOSIS:
I0403 12:21:37.864919    9721 x:0] ***************************
I0403 12:21:37.864986    9721 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-1]
I0403 12:21:37.864998    9721 x:0] Version release-20190304.1-78-gc4caccd54042
I0403 12:21:37.865008    9721 x:0] PID: 9721
I0403 12:21:37.865014    9721 x:0] UID: 0, GID: 0
I0403 12:21:37.865017    9721 x:0] Configuration:
I0403 12:21:37.865020    9721 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root
I0403 12:21:37.865023    9721 x:0] 		Platform: ptrace
I0403 12:21:37.865035    9721 x:0] 		FileAccess: shared, overlay: false
I0403 12:21:37.865048    9721 x:0] 		Network: host, logging: false
I0403 12:21:37.865053    9721 x:0] 		Strace: false, max size: 1024, syscalls: []
I0403 12:21:37.865058    9721 x:0] ***************************
D0403 12:21:37.865082    9721 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-1"
D0403 12:21:37.866401    9721 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-1": signal 0
D0403 12:21:37.866425    9721 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0403 12:21:37.866436    9721 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0403 12:21:37.866674    9721 x:0] urpc: successfully marshalled 118 bytes.
I0403 12:21:38.204016    9721 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-1", PID: 43242
I0403 12:21:38.204028    9721 x:0] Retrieving sandbox stacks
D0403 12:21:38.204034    9721 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0403 12:21:38.204041    9721 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0403 12:21:38.204103    9721 x:0] urpc: successfully marshalled 36 bytes.
W0403 12:21:38.259230    9721 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer