panic: runtime error: index out of range

goroutine 2528 [running]:
unicode/utf8.EncodeRune(0xc00045c1e9, 0x1, 0x7, 0x9c, 0xc00000009c)
	GOROOT/src/unicode/utf8/utf8.go:346 +0x148
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*inputQueueTransformer).transform(0x14385f8, 0xc00092b980, 0xc00092b990, 0xc00052e092, 0x8d, 0x8f, 0x8a3b00000008)
	pkg/sentry/fs/tty/line_discipline.go:403 +0x3f5
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*queue).pushWaitBufLocked(0xc00092b990, 0xc00092b980, 0xc0009e2a80)
	pkg/sentry/fs/tty/queue.go:227 +0xa2
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*queue).write(0xc00092b990, 0xdd9e20, 0xc0009e2a80, 0xdd8e60, 0xc000f2a000, 0x0, 0x1, 0x20000080, 0x8f, 0x100, ...)
	pkg/sentry/fs/tty/queue.go:187 +0x1b2
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*lineDiscipline).inputQueueWrite(0xc00092b980, 0xdd9e20, 0xc0009e2a80, 0xdd8e60, 0xc000f2a000, 0x0, 0x1, 0x20000080, 0x8f, 0x100, ...)
	pkg/sentry/fs/tty/line_discipline.go:205 +0xef
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*masterFileOperations).Write(0xc0002425a0, 0xdd9e20, 0xc0009e2a80, 0xc000218510, 0xdd8e60, 0xc000f2a000, 0x0, 0x1, 0x20000080, 0x8f, ...)
	pkg/sentry/fs/tty/master.go:141 +0x85
DIAGNOSIS:
I0330 02:27:41.993246    3251 x:0] ***************************
I0330 02:27:41.993315    3251 x:0] Args: [/syzkaller/managers/kvm-direct-sandbox/current/image -root /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=kvm -file-access=exclusive -network=sandbox debug -stacks ci-gvisor-kvm-direct-sandbox-3]
I0330 02:27:41.993329    3251 x:0] Git Revision: cc0e96a4bd3348ecc2a636fd90118b8e5cce672c
I0330 02:27:41.993333    3251 x:0] PID: 3251
I0330 02:27:41.993343    3251 x:0] UID: 0, GID: 0
I0330 02:27:41.993345    3251 x:0] Configuration:
I0330 02:27:41.993348    3251 x:0] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0330 02:27:41.993351    3251 x:0] 		Platform: kvm
I0330 02:27:41.993363    3251 x:0] 		FileAccess: exclusive, overlay: false
I0330 02:27:41.993369    3251 x:0] 		Network: sandbox, logging: false
I0330 02:27:41.993374    3251 x:0] 		Strace: false, max size: 1024, syscalls: []
I0330 02:27:41.993378    3251 x:0] ***************************
D0330 02:27:41.993393    3251 x:0] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-3"
D0330 02:27:41.994676    3251 x:0] Signal container "ci-gvisor-kvm-direct-sandbox-3": signal 0
D0330 02:27:41.994696    3251 x:0] Signal sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0330 02:27:41.994700    3251 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0330 02:27:41.994825    3251 x:0] urpc: successfully marshalled 110 bytes.
I0330 02:27:42.155902    3251 x:0] Found sandbox "ci-gvisor-kvm-direct-sandbox-3", PID: 43060
I0330 02:27:42.155936    3251 x:0] Retrieving sandbox stacks
D0330 02:27:42.155940    3251 x:0] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0330 02:27:42.155944    3251 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3"
D0330 02:27:42.156031    3251 x:0] urpc: successfully marshalled 36 bytes.
W0330 02:27:42.175600    3251 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer