`unknown-cast-variable` in last function of a file

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Type Checking

Expected Behaviour

I have a file with two functions that both cast a local variable to a different type. This works perfectly for the first function but fails for the second (or the last if I add more functions).

Actual Behaviour

Error Unknown type conversion variable item (unknown-cast-variable) for the ---@cast item B inside fu().

Reproduction steps

---@alias A table
---@alias B table

---@type table<number, A>
local items = {}

function fu()
  local item = items[1]
  ---@cast item B
end

function bar()
  local item = items[1]
  -- Error appears here:
  ---@cast item B
end

Additional Notes

No response

Log File

No response

Beginne mit der Lua-Reproduktion im Issue und verfolge, wie der Language Server ---@cast-Variablen über aufeinanderfolgende Funktionen hinweg behandelt. Vergleiche den erfolgreichen Cast in fu() mit dem fehlschlagenden Cast in bar(); abgeschlossen ist die Aufgabe, wenn beide Casts ohne unknown-cast-variable akzeptiert werden.