stack traceback:
	kernel:116: in function <kernel:111>
	[C]: in function 'error'
	kernel:299: in function <kernel:296>
	(...tail calls...)
	/lib/term.lua:84: in function 'isWide'
	/lib/term.lua:52: in function 'setCursor'
	/lib/term.lua:145: in function 'setCursor'
	/lib/term.lua:189: in function 'right'
	/lib/term.lua:244: in function 'insert'
	/lib/term.lua:281: in function 'onKeyDown'
	/lib/term.lua:333: in function 'read'
	boot/02_io.lua:25: in function 'read'
	/lib/buffer.lua:68: in function 'readChunk'
	/lib/buffer.lua:116: in function </lib/buffer.lua:106>
	(...tail calls...)
	[C]: in function 'xpcall'
	kernel:111: in function 'xpcall'
	/bin/lua.lua:62: in main chunk
	(...tail calls...)