panic: runtime error: index out of range

goroutine 3105803 [running]:
DIAGNOSIS:
I0403 19:09:24.483279   59399 x:0] ***************************
I0403 19:09:24.483348   59399 x:0] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=none debug -stacks ci-gvisor-main-0]
I0403 19:09:24.483360   59399 x:0] Version release-20190304.1-78-gc4caccd54042
I0403 19:09:24.483364   59399 x:0] PID: 59399
I0403 19:09:24.483369   59399 x:0] UID: 0, GID: 0
I0403 19:09:24.483372   59399 x:0] Configuration:
I0403 19:09:24.483374   59399 x:0] 		RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0403 19:09:24.483377   59399 x:0] 		Platform: ptrace
I0403 19:09:24.483386   59399 x:0] 		FileAccess: shared, overlay: false
I0403 19:09:24.483391   59399 x:0] 		Network: none, logging: false
I0403 19:09:24.483396   59399 x:0] 		Strace: false, max size: 1024, syscalls: []
I0403 19:09:24.483399   59399 x:0] ***************************
D0403 19:09:24.483416   59399 x:0] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-0"
D0403 19:09:24.484617   59399 x:0] Signal container "ci-gvisor-main-0": signal 0
D0403 19:09:24.484639   59399 x:0] Signal sandbox "ci-gvisor-main-0"
D0403 19:09:24.484643   59399 x:0] Connecting to sandbox "ci-gvisor-main-0"
D0403 19:09:24.491133   59399 x:0] urpc: successfully marshalled 96 bytes.
I0403 19:09:25.089720   59399 x:0] Found sandbox "ci-gvisor-main-0", PID: 11589
I0403 19:09:25.089741   59399 x:0] Retrieving sandbox stacks
D0403 19:09:25.089745   59399 x:0] Stacks sandbox "ci-gvisor-main-0"
D0403 19:09:25.089749   59399 x:0] Connecting to sandbox "ci-gvisor-main-0"
D0403 19:09:25.089795   59399 x:0] urpc: successfully marshalled 36 bytes.
W0403 19:09:25.170180   59399 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-main-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-main-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer