Hi guys, anyone getting crash changing the button style when is clicked? My code:

@Model
object MyHomeState {
    var isDoingSomething = false

    fun turnDoingSomething() {
        isDoingSomething = !isDoingSomething
    }
}

@Composable
private fun MyHomeContent() {
    Padding(32.dp) {
        Row {
            Button(
                style = if(!MyHomeState.isDoingSomething) ContainedButtonStyle() else OutlinedButtonStyle(),
                onClick = if(MyHomeState.isDoingSomething) null else MyHomeState::turnDoingSomething
            ) {
                Text("START")
            }
            WidthSpacer(width = 16.dp)
            Button(
                style = if(MyHomeState.isDoingSomething) ContainedButtonStyle() else OutlinedButtonStyle(),
                onClick = if(!MyHomeState.isDoingSomething) null else MyHomeState::turnDoingSomething
            ) {
                Text("STOP")
            }
        }
    }
}

cc @Chuck Jazdzewski [G] any ideas here?

Whenever the exception "Expected a group start" indicates that there is an internal problem in either the compiler plugin or the runtime or both. In this case there, the effects use a constant key and sometime result in this kind of issue. They should be using a compiler generated group key and then the runtime would know that the effect being requested is in someway different (e.g. the

memo

as a different number of parameters) than the effect that was at this spot in the composition. Since they both use the same key sometimes the composer gets confused causing this issue. Please report this as a bug and we can work around it in

Ripple.kt

. Eventually, when we switch to using the unary

+

to converting effects to be

@Composable

functions, this type of issue will go away.

Issue reported at https://issuetracker.google.com/issues/143523913

Thanks!