panic: runtime error: index out of range

goroutine 1989 [running]:
unicode/utf8.EncodeRune(0xc0004a41eb, 0x1, 0x5, 0xc000000098, 0x1)
	GOROOT/src/unicode/utf8/utf8.go:346 +0x29f
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*inputQueueTransformer).transform(0x23a8c38, 0xc0004e3e00, 0xc0004e3e10, 0xc0004a4214, 0xc, 0xc, 0xc0005203c0)
	pkg/sentry/fs/tty/line_discipline.go:403 +0x4a3
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*queue).pushWaitBufLocked(0xc0004e3e10, 0xc0004e3e00, 0xc00064ca80)
	pkg/sentry/fs/tty/queue.go:227 +0x193
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*queue).write(0xc0004e3e10, 0x12a4920, 0xc00064ca80, 0x12a3a20, 0xc0002e5b00, 0x0, 0x1, 0x20000240, 0x10, 0x100, ...)
	pkg/sentry/fs/tty/queue.go:187 +0x1d3
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*lineDiscipline).inputQueueWrite(0xc0004e3e00, 0x12a4920, 0xc00064ca80, 0x12a3a20, 0xc0002e5b00, 0x0, 0x1, 0x20000240, 0x10, 0x100, ...)
	pkg/sentry/fs/tty/line_discipline.go:205 +0x148
gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*masterFileOperations).Write(0xc0004e04a0, 0x12a4920, 0xc00064ca80, 0xc0008e01b0, 0x12a3a20, 0xc0002e5b00, 0x0, 0x1, 0x20000240, 0x10, ...)
	pkg/sentry/fs/tty/master.go:141 +0x11d
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Writev(0xc0008e01b0, 0x12a4920, 0xc00064ca80, 0x12a3a20, 0xc0002e5b00, 0x0, 0x1, 0x20000240, 0x10, 0x100, ...)
	pkg/sentry/fs/file.go:314 +0x1fd
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.writev(0xc00064ca80, 0xc0008e01b0, 0x12a3a20, 0xc0002e5b00, 0x0, 0x1, 0x20000240, 0x10, 0x100, 0x10, ...)
	pkg/sentry/syscalls/linux/sys_write.go:261 +0xe1
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Write(0xc00064ca80, 0x3, 0x20000240, 0x10, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_write.go:71 +0x294
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00064ca80, 0x1, 0x3, 0x20000240, 0x10, 0x0, 0x0, 0x0, 0x465c01, 0xc00064d258, ...)
	pkg/sentry/kernel/task_syscall.go:165 +0x408
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00064ca80, 0x1, 0x3, 0x20000240, 0x10, 0x0, 0x0, 0x0, 0x1, 0xc0003e52c0)
	pkg/sentry/kernel/task_syscall.go:283 +0xb5
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00064ca80, 0x1, 0x3, 0x20000240, 0x10, 0x0, 0x0, 0x0, 0xc0008c3d40, 0xd22be5)
	pkg/sentry/kernel/task_syscall.go:244 +0x10a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00064ca80, 0x2, 0xc000776340)
	pkg/sentry/kernel/task_syscall.go:219 +0x1b7
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00064ca80, 0x128c120, 0x0)
	pkg/sentry/kernel/task_run.go:215 +0x1853
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc00064ca80, 0x5d)
	pkg/sentry/kernel/task_run.go:91 +0x2e6
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:279 +0x19e