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LuaMultiReturn cast is not considered on generation #1657

@d-enk

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@d-enk
const Lua = (): LuaMultiReturn<[number, string]> => $multi(1, "")
const Any = (): any => $multi(1, "")

const [n1, str1] = Lua()
const [n2, str2] = Any()

const [n3, str3] = Any() as [number, string]
const [n4, str4] = Any() as LuaMultiReturn<[number, string]>
local function Lua() return 1, "" end
local function Any() return 1, "" end

local n1, str1 = Lua()         -- OK
local n2, str2 = unpack(Any()) -- OK (expected tuple by default)

local n3, str3 = unpack(Any()) -- OK 
local n4, str4 = unpack(Any()) -- unexpected unpack (LuaMultiReturn ignored)

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