panic: runtime error: index out of range

goroutine 282 [running]:
unicode/utf8.EncodeRune(0xc000502260, 0x1, 0x8, 0xa5, 0x1)
	GOROOT/src/unicode/utf8/utf8.go:346 +0x148
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*inputQueueTransformer).transform(0x14385f8, 0xc000644a80, 0xc000644a90, 0xc000502258, 0x0, 0x1, 0x8a3b00000008)
	pkg/sentry/fs/tty/line_discipline.go:403 +0x3f5
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*queue).pushWaitBufLocked(0xc000644a90, 0xc000644a80, 0xc0005c5500)
	pkg/sentry/fs/tty/queue.go:227 +0xa2
DIAGNOSIS:
I0329 22:13:16.876816    6918 x:0] ***************************
I0329 22:13:16.876874    6918 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-0]
I0329 22:13:16.876887    6918 x:0] Git Revision: cc0e96a4bd3348ecc2a636fd90118b8e5cce672c
I0329 22:13:16.876891    6918 x:0] PID: 6918
I0329 22:13:16.876896    6918 x:0] UID: 0, GID: 0
I0329 22:13:16.876899    6918 x:0] Configuration:
I0329 22:13:16.876901    6918 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root
I0329 22:13:16.876904    6918 x:0] 		Platform: ptrace
I0329 22:13:16.876916    6918 x:0] 		FileAccess: shared, overlay: false
I0329 22:13:16.876923    6918 x:0] 		Network: host, logging: false
I0329 22:13:16.876928    6918 x:0] 		Strace: false, max size: 1024, syscalls: []
I0329 22:13:16.876931    6918 x:0] ***************************
D0329 22:13:16.876948    6918 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-0"
D0329 22:13:16.878197    6918 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-0": signal 0
D0329 22:13:16.878215    6918 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-0"
D0329 22:13:16.878219    6918 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-0"
D0329 22:13:16.878334    6918 x:0] urpc: successfully marshalled 118 bytes.
I0329 22:13:17.102479    6918 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-0", PID: 3848
I0329 22:13:17.102504    6918 x:0] Retrieving sandbox stacks
D0329 22:13:17.102508    6918 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-0"
D0329 22:13:17.102513    6918 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-0"
W0329 22:13:17.102562    6918 x:0] FATAL ERROR: retrieving stacks: connecting to control server at PID 3848: connection refused
retrieving stacks: connecting to control server at PID 3848: connection refused