IssueTracker

Jetpack Compose version: compose-bom:2023.05.01 → 1.4.3

Jetpack Compose Compiler version: 1.4.7

Jetpack Compose components used: ui, ui-graphics, ui-tooling-preview, material3, ui-tooling

Android Studio Build: Android Studio Flamingo | 2022.2.1 RC 1

Kotlin version: 1.8.21

I was experimenting with the Compose compiler reports and wanted to identify which classes are inferred as stable. In most cases, everything seemed fine, but I noticed a potential issue when a class extends an unstable class. The Compose compiler incorrectly considers it as stable, which I believe might be a bug (please correct me if I'm mistaken). Let's consider the following code as an example:

open class Parent {
    var age: Int = 0
    var name: String = ""

    fun info() = "$name|$age"
}

class Child : Parent()

When I enable the Compose compiler reports and invoke it, the classes.txt file displays the following output:

unstable class Parent {
  stable var age: Int
  stable var name: String
  <runtime stability> = Unstable
}
stable class Child {
  <runtime stability> = Stable
}

The Parent class is correctly inferred as unstable, but the Child class is incorrectly inferred as stable. Shouldn't this be considered a bug? Additionally, the compiler reports suggest that something like this is skippable, which I believe should not be the case.

@Composable
fun Item(child: Child) {
    Text(child.info())
}