No warning when assign constant `nil` to required table field

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

Warning when assign constant nil to required table field
as it happens with ordinary variables

Actual Behaviour

Reproduction steps

---@type number
local n

n = nil
n = 1

---@class A
---@field n number

---@type A
local a = { n = nil }

a.n = 1

local NIL = nil
a.n = NIL

-- BUT no warning
a.n = nil -- ?

_ = { a, n }

Additional Notes

Most likely this is a duplicate but I couldn't find the issue

Log File

No response

Start with the Lua reproduction in the issue and inspect the type-checking diagnostic path for table-field assignments. Confirm that assigning the constant nil to required field A.n produces the same warning as assigning nil to n; the existing cases and the final a.n = nil example define the expected behavior.