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.

首先检查 PSScriptAnalyzer 现有的、用于检测已赋值但未被引用的变量的规则，然后检查是否已经存在对应的未赋值变量规则，以及规则是如何启用的。将完成定义为以下任一项：记录现有规则，或指定并实现一条报告在赋值前被引用的变量的规则，并覆盖已报告的 null-reference 情况。