Function overloading by declaring multiple functions with same name appears to be completely broken

[jnbooth]

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

MacOS

What is the issue affecting?

Annotations, Type Checking

Expected Behaviour

Given:

---@meta

---@param stringParam string
function DoSomething(stringParam) end

---@param intParam1 integer
---@param intParam2 integer
function DoSomething(intParam1, intParam2) end

DoSomething("test")

I would expect DoSomething("test") to pass typechecking, because it meets the first definition of DoSomething (a single string parameter).

Actual Behaviour

Typechecking fails with "This function requires 2 argument(s) but instead it is receiving 1. (missing-parameter)"

Reproduction steps

1. Paste the above code into a file
2. Hover over the last line (DoSomething("test"))
3. See error

Additional Notes

This issue does not apply to the use of @overload for functions. This passes typechecking:

---@meta

---@param stringParam string
---@overload fun(intParam1: integer, intParam2: integer)
function DoSomething(stringParam) end

DoSomething("test")

Log File

No response

[tomlau10]

From my experience, this only happens if you write the function call inside a @meta file.
If you test it in a separate, non @meta file, it works correctly. 🤔

• meta.lua

---@meta

---@param stringParam string
function DoSomething(stringParam) end

---@param intParam1 integer
---@param intParam2 integer
function DoSomething(intParam1, intParam2) end

• main.lua

DoSomething("test") --< no warning, and points to `function DoSomething(stringParam: string)`