Syntax warning / error not flagged as such.

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

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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

Reproduce the report in the Visual Studio Code extension using the Lua snippet local varA, varB functionCalledHere(). Start by tracing how syntax diagnostics are produced for this incomplete declaration, then add a regression test for the snippet and verify that a warning or error is reported rather than no diagnostic.