IssueTracker

Jetpack Compose version: 1.7.1

Jetpack Compose component(s) used: ProvidableCompositionLocal and providesDefault

Android Studio Build: Jellyfish 2023.3.1 Patch 2

Kotlin version: 2.0.21

Steps to Reproduce or Code Sample to Reproduce:

Nesting multiple providesDefault for a ProvidableCompositionLocal blocks any changes from other wrapper ProvidableCompositionLocals from being propagated from the root block to the second nested block.

Example:

val LocalValue: ProvidableCompositionLocal<Int> =
    staticCompositionLocalOf { error("No value provided") }

val LocalOtherValue: ProvidableCompositionLocal<Boolean> =
    staticCompositionLocalOf { error("No other value provided") }


@Composable
fun Example() {
    var external by remember { mutableStateOf(false) }

    CompositionLocalProvider(LocalOtherValue provides external) {
        LocalOtherValue.current.also {
            LaunchedEffect(it) { println("Root block other value changed") }
        }
        CompositionLocalProvider(LocalValue providesDefault 1) {
            LocalOtherValue.current.also {
                LaunchedEffect(it) { println("First block other value changed") }
            }
            CompositionLocalProvider(LocalValue providesDefault 1) {
                LocalOtherValue.current.also {
                    LaunchedEffect(it) { println("Second block other value changed") }
                }
            }
        }
    }

    LaunchedEffect(Unit) {
        delay(1000)
        external = !external
    }
}   

In this example "Second block other value changed" should get printed twice because LocalOtherValue is expected to change and trigger the LaunchedEffect inside the second block but it does not. It only changes inside the "Root block other value changed" and "First block other value changed" blocks.

As per my understanding providesDefault should only affect LocalValue.