IssueTracker

Assigning to Jetpack Compose team as the issue seems to be with LazyRow and FocusRestorer integration.

When I try with the last version 1.8.0-rc01 with this code :

var buttons by remember { mutableStateOf((1..10).toList()) }
val lineFocusRequester = remember { FocusRequester() }
val firstItemFocusRequester = remember { FocusRequester() }

Column {
    Button(
        onClick = { },
        modifier = Modifier.padding(20.dp)
    ) {
        Text("Hello")
    }

    LazyRow(
        modifier = Modifier
            .padding(16.dp)
            .focusRequester(lineFocusRequester)
            .focusRestorer(firstItemFocusRequester),
        horizontalArrangement = Arrangement.spacedBy(8.dp)
    ) {
        itemsIndexed(
            items = buttons,
            key = { index, _ -> index }
        ) { index, buttonId ->
            Button(
                onClick = {
                    buttons = buttons.filter { it != buttonId }
                },
                modifier = Modifier
                    .padding(4.dp)
                    .ifElse(index == 0, Modifier.focusRequester(firstItemFocusRequester))
            ) {
                Text("Button $buttonId")
            }
        }
    }
}

When I click on the last button the focus is lost and goes to the "Hello" button. And when I go down, the app is crashing :

Process: com.example.recomposetests, PID: 6000
java.lang.IllegalStateException: 
FocusRequester is not initialized. Here are some possible fixes:

1. Remember the FocusRequester: val focusRequester = remember { FocusRequester() }
2. Did you forget to add a Modifier.focusRequester() ?
3. Are you attempting to request focus during composition? Focus requests should be made in response to some event. Eg Modifier.clickable { focusRequester.requestFocus() }
    at androidx.compose.ui.focus.FocusRequester.findFocusTargetNode$ui_release(FocusRequester.kt:275)
    at androidx.compose.ui.focus.FocusRequester.requestFocus-3ESFkO8(FocusRequester.kt:82)
    at androidx.compose.ui.focus.FocusRequester.requestFocus-3ESFkO8$default(FocusRequester.kt:82)
.....

The problem is that the focusRestorer try to focus the first item (firstItemFocusRequester) but this item is not on the screen.

The expected result is when I click on the last button, the button is deleted and the focus stay on the same line on the new last button.

Thank you for your investigation.