Type '(a) -> string' could not be converted into '<a>(a) -> string'; different number of generic type parameters

[TheLegendaryDragon99 (TLD99)]

Type Error: (46,5) Type ‘self’ could not be converted into ‘self’
caused by:
Type ‘Participant’ could not be converted into ‘Participant’
caused by:
Type ‘Participant’ from ‘game.ServerScriptService.Server.Classes.Participant’ could not be converted into ‘Participant’ from ‘game.ServerScriptService.Server.Classes.Participant’

So I just got this error and I completely have no idea what this means.

[SuguruDev]

Mind telling me what line this error is taking place on?

[TheLegendaryDragon99 (TLD99)]

This is from line 46, character 5.

[SuguruDev]

@TheLegendaryDragon99

‘self’ could not be converted into ‘self’

I sadly have no idea on how to use “Self” and this may not be much of a help.
So I will link some Dev forums and hopefully they help you!

Links : Why can I never use self?

What is self and how can I use it?

You can write your topic however you want, but you need to answer these questions: What do you want to achieve? Keep it simple and clear! I would like to make a character controller of @EgoMoose se What is the issue? Include screenshots / videos if possible! I don’t know what self is. What solutions have you tried so far? Did you look for solutions on the Developer Hub? I don’t find a post that read about self. I don’t want you to write a whole code, but a simple example would be …

Typing problem: Type'() -> ()' could not be converted into '(any) -> g39

I don’t know much about Luau typing but I am just simply having this warning while putting my mouse over the function. Type’() → ()’ could not be converted into '(any) → g39 (I have no idea what g39 is supposed to be) The code is just my attempt to assign a function to a BindableFunction’s OnInvoke property: --!strict local bindable: BindableFunction = Instance.new("BindableFunction") bindable.OnInvoke = function() end Anyone know a fix or how to avoid this warning entirely?

Sorry im not much of a help.

[TheLegendaryDragon99 (TLD99)]

I don’t really know, I think this must be a Type checking bug.

[SuguruDev]

Possibly, as I said I have no knowledge in “Self” sadly, and wont be much of a help.
I say try experimenting with other ways to do it, and see if that works.

[metatablecatmaid (metatablecat)]

You might need to be more explicit with the typing.

For example, instead of t:k(), try doing
t.k(self: T)

The code will continue work as expected.

If you want a quick hack you can use this pattern to declare a genericless object with a metatable

type x = typeof(setmetatable({}::{

}, {}::{

}))