[desktop] ScrollBar freezes the app if listState.animateScrollBy or animateScrollToItem are used

[avently]

Describe the bug

When dragging scrollbar and something calls listState.animateScrollBy(10f), the app freezes and there is no way to use it without restart. With listState.scrollBy it works fine, so it's somehow related to animation.

Affected platforms

• Desktop (Windows, Linux, macOS)

Versions

• Kotlin version*: 1.9.23
• Compose Multiplatform version*: 1.6.2
• OS architecture (x86 or arm64): x86

To Reproduce

• git clone https://github.com/JetBrains/compose-multiplatform
• add this code to https://github.com/JetBrains/compose-multiplatform/blob/master/examples/todoapp-lite/shared/src/commonMain/kotlin/example/todoapp/lite/common/MainContent.kt#L86:

  LaunchedEffect(items.size) {
  listState.animateScrollBy(10f)
  }

• cd examples/todoapp-lite
• ./gradlew run
• put mouse focus to text view and press Enter many times until you see scroll bar at the right side of screen. After you see it already, try to drag it and press Enter again without stopping dragging the scrollbar up and down. You'll notice the whole app is freezed.

This behaviour is somehow related to animation because if you call listState.scrollBy(10f) eveyrthing is fine. animateScrollToItem is also affected while scrollToItem is not.

Expected behavior Shouldn't freeze the app

[alexzhirkevich]

It is the same bug as #3807 and should be already fixed by https://github.com/JetBrains/compose-multiplatform-core/pull/575. Try 1.6.10-beta01

[avently]

I found that issue before but not resulting PR. It works, thank you!

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.