Sublime fails to obtain system input

gistfile1.rb

#!/usr/bin/env ruby

@my_number = (rand(10) + 1).to_s
@tries = 10

def try
  print "Tries left = #{@tries -= 1}: Guess my number (1..10): "
  gets.chomp == @my_number rescue puts "<nil input>"
end

while (!(succeed=try()) && @tries > 0); end