I have a weird issue where `Test` composable in the snippet kotlinlang #compose

Box {
  var enable by remember { mutableStateOf(true) }
  println("enable out=$enable")
  Test(enable = enable)
  Button(onClick = { enable = !enable })
}

@Composable
fun Test(enable: Boolean) {
  println("enable in=$enable")
  Text(text = enable.toString())
}

🤔 1

Whenever I press the button, outer

println

is called, but iner println is not called, it appears only once

Any ideas on how to debug this?

Albert Chang

11/19/2021, 6:29 PM

If you can come up with a repro, file a bug.

dimsuz

11/19/2021, 7:47 PM

Yep, I will try, something really weird. This happens only if

enable

is boolean. I thought maybe boxing is involved, but it works for

Int

String

, whatever else. Only

boolean

causes no further calls to

Test()

to occur.

Investigated and managed to create a not-so-minimal example of some weird nesting

SubcomposeLayout

-usage based bug, reproducible in both stable and beta. Filed it to the issue tracker: https://issuetracker.google.com/issues/207107687 Though I still suspect that I might've done something I wasn't suppose to do during layout. Still I think it shouldn't produce those weird recomposition skips. If anyone points out mistakes/fixes, would be grateful.

Albert Chang

11/22/2021, 2:37 AM

You’d better file with the specific component (“Jetpack Compose” or “Jetpack Compose > Compiler plug-in and runtime” in this case) instead of the general “App Development” in order for the right people to see it.

dimsuz

11/22/2021, 9:10 AM

Ooops, I thought I filed it under Jetpack Compose, not sure how it ended up in a more generic one. And I don't know how to move it 😞 UPD: looks like I have no permissions to edit, recreated as https://issuetracker.google.com/issues/207227862

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