Getting nil for a variable in one case but not another.

example.rb

# player is in attr_accessor call inside the class.

# no error thrown
def render(gc, sbg, g)
    @player.graphic 
    draw_surfaces
    g.translate offset_x, offset_y
end

# (NoMethodError) undefined method `+' for nil:NilClass
def render(gc, sbg, g)
    @player.graphic.draw((@player.x + offset_x), @player.y)
    draw_surfaces
    g.translate offset_x, offset_y
end