No 'Variable Referenced Before Assignment' Rule?

From what I can tell, there's no linting rule to check if a variable is null or unassigned when it's being referenced. This would be super helpful to avoid nullref errors when running a script or module. I know there's a "variable assigned but not referenced/used" rule, but that's kind of the opposite of what I'm looking for.

I know this functionality exists in pylint for python, but I sorely miss this when working with PowerShell.

Does this exist? If so, how does one enable it?

Apologies if there is already an issue for this somewhere. I couldn't find one.

先檢查 PSScriptAnalyzer 現有的、用於偵測已指派但未被參照之變數的規則，然後確認是否已存在對應的未指派變數規則，以及規則如何啟用。將完成定義為以下任一項：記錄現有規則，或規格化並實作一項回報在指派前被參照之變數的規則，並涵蓋已回報的 null-reference 情況。