global_typo_problem.txt

Python:

def myfunc (x):
    print(x)
    
def myotherfunc (x):
    # typo: error only becomes visible when myotherfunc
    # is called.
    myfun(x)
    
Lua:

local function myfunc (x)
    print(x)
end

local function myotherfunc (x)
    -- same problem: not visible until myotherfunc
    -- is called
    myfun(x)
end

new None rule for globals:

function myfunc (x)
    print x

function myotherfunc (x)
    ; error on load: myfun
    ; is not an existing global
    myfun x