panic: runtime error: slice bounds out of range [:17] with capacity 16

DIAGNOSIS:
I0102 17:03:30.722465   64903 x:0] ***************************
I0102 17:03:30.722515   64903 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 -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-2]
I0102 17:03:30.722684   64903 x:0] Version release-20191213.0-56-g1f384ac42b9e
I0102 17:03:30.722714   64903 x:0] PID: 64903
I0102 17:03:30.722753   64903 x:0] UID: 0, GID: 0
I0102 17:03:30.722784   64903 x:0] Configuration:
I0102 17:03:30.722809   64903 x:0] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0102 17:03:30.722836   64903 x:0] 		Platform: ptrace
I0102 17:03:30.722863   64903 x:0] 		FileAccess: shared, overlay: false
I0102 17:03:30.722929   64903 x:0] 		Network: sandbox, logging: false
I0102 17:03:30.722989   64903 x:0] 		Strace: false, max size: 1024, syscalls: []
I0102 17:03:30.723039   64903 x:0] ***************************
W0102 17:03:30.723067   64903 x:0] Block the TERM signal. This is only safe in tests!
D0102 17:03:30.724046   64903 x:0] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0102 17:03:30.734390   64903 x:0] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-2": signal 0
D0102 17:03:30.735013   64903 x:0] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0102 17:03:30.735075   64903 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0102 17:03:30.735809   64903 x:0] urpc: successfully marshalled 117 bytes.
I0102 17:03:31.186879   64903 x:0] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2", PID: 5531
I0102 17:03:31.186971   64903 x:0] Retrieving sandbox stacks
D0102 17:03:31.187942   64903 x:0] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0102 17:03:31.188004   64903 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0102 17:03:31.188157   64903 x:0] urpc: successfully marshalled 36 bytes.
W0102 17:03:31.305786   64903 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0102 17:03:31.306109   64903 x:0] Failure to execute command, err: 1