[Mail script problem]

I am working on a mod and trying to execute the following function:

Quote

function createDeathMail()
    local player = Player()
    local mail = Mail()
    x, y = Sector():getCoordinates()
    mail.text = Format("Sector %1%:%2% will be destroyed by the Xsotan. You must immediately evacuate.\n\nBest wishes, Space Association"%_t, x, y)
    mail.header = "Xsotan Report"%_T
    mail.sender = "Space Association"%_T
    mail.receiver = player.id
    mail.id = "Xsotan"
    player:addMail(mail)
end

I get a error in logs: attempt to index local 'player' (a nil value).  I'd really appreciate any advice on this.