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.

Comienza revisando la regla existente de PSScriptAnalyzer para las variables a las que se asigna un valor pero que no se referencian; después, comprueba si ya existe una regla correspondiente para variables no asignadas y cómo se habilitan las reglas. Define como completado documentar la regla existente o especificar e implementar una regla que informe de las variables referenciadas antes de su asignación, con cobertura para el caso de null-reference informado.