plugin:SetSetting silently fails to set if the key has a period in it.
Reproduction:
This should be ran as a plugin. A public plugin and local plugin both do the same thing.
-- Modified example from
-- https://create.roblox.com/docs/reference/engine/classes/Plugin#SetSetting
local ShouldBreak = true
local key = ShouldBreak and "Ke.y" or "Key"
local times = plugin:GetSetting(key) or 0
times += 1
plugin:SetSetting(key, times)
if times == 1 then
print("This is your first time!")
else
print(`Ran {times} times so far!`)
end
warn("After SetSetting:", plugin:GetSetting(key))
--[[
The warning will print a number if ShouldBreak is false.
If ShouldBreak is true, it is nil with seemingly no reason.
]]
Now we know not to put periods in the key. Here’s a quick tester to see which keys worked and which failed!
local function test(char: string): boolean
local tests = {
`{char}AB`,
`A{char}B`,
`AB{char}`,
char,
}
for _, str in pairs(tests) do
plugin:SetSetting(str, true)
if not plugin:GetSetting(str) then
return false
end
end
return true
end
local tests = {
"A",
"!", ".", ",", "?", "_", ";",
"1", "9", "0",
"(", ")", "[", "]",
" ", "<", ">",
}
for _, v in pairs(tests) do
local result = test(v)
if result then
print(v, "passed.")
else
warn(v, "failed.")
end
end
The output of this shows that ONLY the period has failed. Every other character passes the test.
Specifications:
OS: Windows 11
Version:0.622.0.6220470
Relevant Settings:Plugin Debugging,Show CoreGui,Show PluginGuiService,Autocomplete Plugin-Security
Beta Features: Video attached.
PS: I have wasted a few hours trying to fix my code. It took a while, but I finally suspected it wasn’t my fault! I used the key v1.0.0, which of course had a period. 
Expected behavior
I expect all keys to work. If they don’t, I expect an error saying it cannot save the setting.
