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0
Why is this printing things?
setfenv(function()end,setmetatable({},{__index=print}))()
This should not print anything, but the output says
table: 1CF65F98 script
table: 1CF65F98 script
similarly, this should error "lag" but something mysterious causes otherwise
local c,tick,error=tick(),tick,error
setfenv(1,setmetatable({},{
__index=function(t,k)
--print(t,k)
return rawget(t,k)
end})
);
(function(f)
return f(f)
end)(function(f)
if tick()-c>1 then
error("lag")
end
return f(f)
end)
This only happens in Roblox. What is going on?
0
Lol you are soo advanced in scripting, I feel like no one would know how to help you :P FiredDusk 1466 — 7y
0
This is easy to understand. Link150 1355 — 7y
1 answer
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1
This happened to me a couple of months ago, I'm not entirely sure why it's exactly happening but here were my conclusions:
local print = print
local function func()
print("Blah")
print("kah")
local y = 3
end
setfenv(func, setmetatable({ script = 123 }, {
__index = function(self, key)
-- getfenv(0) == getfenv(1) == getfenv(3)
-- getfenv(2) == getfenv(func)
print("Current env", getfenv(1), rawget(getfenv(1), "script"))
print("Caller env", getfenv(2), rawget(getfenv(2), "script"))
print("Caller of Caller env", getfenv(3), rawget(getfenv(3), "script"))
end
}))
print("func Function Environment", getfenv(func))
print("Global Environment", getfenv(0))
print("Enclosing Function Environment", getfenv(1)) -- should be the global environment
func()
It seems like every time I do something in func, __index is invoked. It leads me to believe it might be the script debugger or something but I have no idea. Although I believe this only happens in studio as well, don't remember. If it's not the debugger then I have no idea what it is but they definitely tampered with Lua as it's invoked even when I define a local variable.