panic: runtime error: index out of range

DIAGNOSIS:
I0403 14:29:58.057153   31988 x:0] ***************************
I0403 14:29:58.057206   31988 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 14:29:58.057217   31988 x:0] Version release-20190304.1-78-gc4caccd54042
I0403 14:29:58.057226   31988 x:0] PID: 31988
I0403 14:29:58.057232   31988 x:0] UID: 0, GID: 0
I0403 14:29:58.057235   31988 x:0] Configuration:
I0403 14:29:58.057238   31988 x:0] 		RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0403 14:29:58.057255   31988 x:0] 		Platform: ptrace
I0403 14:29:58.057260   31988 x:0] 		FileAccess: shared, overlay: false
I0403 14:29:58.057265   31988 x:0] 		Network: none, logging: false
I0403 14:29:58.057270   31988 x:0] 		Strace: false, max size: 1024, syscalls: []
I0403 14:29:58.057273   31988 x:0] ***************************
D0403 14:29:58.057290   31988 x:0] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-0"
D0403 14:29:58.059172   31988 x:0] Signal container "ci-gvisor-main-0": signal 0
D0403 14:29:58.059198   31988 x:0] Signal sandbox "ci-gvisor-main-0"
D0403 14:29:58.059202   31988 x:0] Connecting to sandbox "ci-gvisor-main-0"
D0403 14:29:58.059385   31988 x:0] urpc: successfully marshalled 96 bytes.
I0403 14:29:58.347387   31988 x:0] Found sandbox "ci-gvisor-main-0", PID: 18906
I0403 14:29:58.347406   31988 x:0] Retrieving sandbox stacks
D0403 14:29:58.347410   31988 x:0] Stacks sandbox "ci-gvisor-main-0"
D0403 14:29:58.347414   31988 x:0] Connecting to sandbox "ci-gvisor-main-0"
D0403 14:29:58.347464   31988 x:0] urpc: successfully marshalled 36 bytes.
W0403 14:29:58.421533   31988 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