## Compiler version 3.3.1, 3.4.0-RC1-bin-20230911-1be790c-NIGHTLY ## Minimized code ```Scala //> using scala "3.3.1" //> using lib "org.typelevel::cats-effect:3.5.1" import cats.effect.IOLocal @main def demo = println(IOLocal.IOLocalImpl.apply(42)) ``` Note: `IOLocalImpl` is defined as `private[IOLocal] final class IOLocalImpl[A](default: A)` ## Output ```scala cats.effect.IOLocal$IOLocalImpl@483bf400 ``` ## Expectation Compiler failure ## Extra detail I wasn't able to reproduce this without a library dependency.