stdin:1: attempt to call a nil value (gobal ´close´)
stack traceback:
	machine:756: in global ´close´
	stdin:1: in main chunk
	[C] in function ´xpcall´
	machine:751: in global ´xpcall´
	/bin/lua.lua:146: in mail chunk
	[C]: in function ´xpcall´
	machine:751: in global ´xpcall´
	/lib/process.lua:78: in function </lib/process.lua:71>