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Syntax warning / error not flagged as such. #3397
Description
How are you using the lua-language-server?
Visual Studio Code Extension (sumneko.lua)
Which OS are you using?
Windows
What is the issue affecting?
Diagnostics/Syntax Checking
Expected Behaviour
A warning or an error that the line in question is not complete, regardless of how the parser it's run in processes it:
local varA, varB functionCalledHere()Actual Behaviour
No warning or error was given, resulting in a 20 minute hunt for a nil in one of the variables that shouldn't exist. The plugin did not flag the line as having a syntax warning or error, even if the Lua engine did not have an issue with the code per se.
Reproduction steps
.
Additional Notes
Apologies for raising another issue, but I couldn't find any information on if this is a niche feature of Lua or a bug that just hadn't been fixed in 5.1. But if it's not a feature and is an unintended side-effort, I feel like it should be raised as a warning by the LLS to alert the user like "hey, are you sure this is what you were intending to do" similar to variables lacking a nil.
Log File
No response
Activity
tomlau10 commentedon Apr 6, 2026
With some research, this is a valid syntax and "feature" for writing lua script in one line 😅 .
You can just try to ask lua one line syntax without semicolon in google ai mode to see more details.
As an example:
local a; test(), and thattest()is executed aloneawill still benilI am not sure if there should be a no-one-line diagnostic in LuaLS or not 😕
hint.semicolon: https://luals.github.io/wiki/settings/#hintsemicolonhint.enableas well, LuaLS will render the above test code like this:so when you see a virtual semicolon in your code, you know that it is "smelly" 🤔
PS: I found the default luals hint setting a bit distracting, so I also changed some of the default values:
you can know more details from the wiki page: https://luals.github.io/wiki/settings/#hint