Enum created with `@alias` breaks when unioned with table

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Linux

What is the issue affecting?

Type Checking

Expected Behaviour

it should allow either the enum or a table

Actual Behaviour

Cannot assign `integer` to parameter ``BAR`|`FOO`|any[]`.
- `integer` cannot match ``BAR`|`FOO`|any[]`
- Type `integer` cannot match `any[]`
- Type `number` cannot match `any[]`

Reproduction steps

FOO = 1
BAR = 2

--- @alias WAT `FOO` | `BAR`
--- @param a WAT | any[]
local function aa(a) end

aa(FOO)

Additional Notes

Bonus: If you change the type to WAT | WAT[] the error message is

Cannot assign `integer` to parameter ``BAR`|`BAR`|`FOO`[]|`FOO``.
- `integer` cannot match ``BAR`|`BAR`|`FOO`[]|`FOO``
- Type `integer` cannot match ``BAR`|`FOO`[]`
- Type `number` cannot match ``BAR`|`FOO`[]`

which looks very visually confusing

Log File

No response

Reproduisez le code Lua signalé dans l’extension Visual Studio Code et examinez le chemin de vérification des types pour les alias combinés à des unions et des tables. Le travail est terminé lorsque aa(FOO) est accepté pour WAT | any[] et que les diagnostics de types résultants ne sont plus déroutants pour le cas WAT | WAT[].