`@overload` does not cooperate with `@class` when adding overloads to an inherited class method

[HoloTheDrunk]

How are you using the lua-language-server?

NeoVim

Which OS are you using?

Linux

What is the issue affecting?

Completion

Expected Behaviour

Adding an overload to a function inherited from another class should result in both the parent class' overloads and the new overload being suggested as autocomplete and hover tooltip entries.

Actual Behaviour

Adding an overload to a function inherited from another class makes that overload the only one that is recognized for the current class.

Reproduction steps

---@meta

---@class ParentClass
ParentClass = {}

---@param arg string
---@return unknown
---@overload fun(self, arg: "bar"): boolean
function ParentClass:foo(arg) end

---@class ChildClass : ParentClass
---@field foo fun(self, arg: "baz"): number
ChildClass = {}

ChildClass:foo(--[[Should suggest both "bar" and "baz", but only suggests "baz" and "bar" raises a param-type-mismatch]])

Redefining the function and adding an @overload there yields the same result.

Additional Notes

Having some way to mark a function redefinition as an overload (with strict checking that it does exist in the class defined as inherited from) would probably help solve this issue.

Log File

No response

[tomlau10]

I just found a workaround 🤔 you can write your meta definition like this:

---@class ChildClass : ParentClass
ChildClass = {}

---@overload fun(self, arg: "baz"): number
ChildClass.foo = ParentClass.foo

Then ChildClass.foo has both definition from ParentClass.foo as well as the additional overload