Advanced missing nil check

[FlashHit]

This is probably really hard to "fix".

---@type table|nil
local blueprint = { x = 1 }
local hasBlueprint = true

if blueprint == nil then
    hasBlueprint = false
end

if hasBlueprint then
    error("no blueprint found")
end

local s = blueprint.x

[sumneko]

I don't know how to implement this feature

[jlaurens]

This is highly difficult because error could have been intentional redefined locally not to raise an error.