Missing "consider using immutable val" for private[this] var

[som-snytt]

reproduction steps

➜  scala -Xlint
Welcome to Scala 2.13.7 (OpenJDK 64-Bit Server VM, Java 17).
Type in expressions for evaluation. Or try :help.

scala> private var v = 0
                   ^
       warning: private var v in class $iw is never used

scala> private var v = 0 ; def f = v
                   ^
       warning: private var v in class $iw is never updated: consider using immutable val
def f: Int

scala> private[this] var v = 0
                         ^
       warning: private var v in class $iw is never used

scala> private[this] var v = 0 ; def f = v
def f: Int

scala>

problem

I didn't expect to lose my linting.

Noticed at scala/scala#9818 (comment)

[joroKr21]

Does the current linting work based on the setter? Because private[this] var has no setter.
Edit: yes - based on unused symbols (if it's a setter) we show this advice.
But the symbol is used (however not updated) and there is no setter. Not sure if good first issue.
I don't understand how it works for local var 🤔