IssueTracker

Originally reported in b/296891215#5

I'm able to reproduce very similar leak with PopupLayout.

My leak trace is:

====================================
HEAP ANALYSIS RESULT
====================================
1 APPLICATION LEAKS

References underlined with "~~~" are likely causes.
Learn more at https://squ.re/leaks.

71630 bytes retained by leaking objects
Signature: 6db4648fdb7f568057569da8ff3eb4c886b658d6
┬───
│ GC Root: System class
│
├─ android.view.accessibility.AccessibilityManager class
│    Leaking: NO (AndroidComposeView↓ is not leaking and a class is never leaking)
│    ↓ static AccessibilityManager.sInstance
├─ android.view.accessibility.AccessibilityManager instance
│    Leaking: NO (AndroidComposeView↓ is not leaking)
│    ↓ AccessibilityManager.mAccessibilityStateChangeListeners
├─ android.util.ArrayMap instance
│    Leaking: NO (AndroidComposeView↓ is not leaking)
│    ↓ ArrayMap.mArray
├─ java.lang.Object[] array
│    Leaking: NO (AndroidComposeView↓ is not leaking)
│    ↓ Object[4]
├─ androidx.compose.ui.platform.AndroidComposeViewAccessibilityDelegateCompat$$ExternalSyntheticLambda1 instance
│    Leaking: NO (AndroidComposeView↓ is not leaking)
│    ↓ AndroidComposeViewAccessibilityDelegateCompat$$ExternalSyntheticLambda1.f$0
├─ androidx.compose.ui.platform.AndroidComposeViewAccessibilityDelegateCompat instance
│    Leaking: NO (AndroidComposeView↓ is not leaking)
│    ↓ AndroidComposeViewAccessibilityDelegateCompat.view
├─ androidx.compose.ui.platform.AndroidComposeView instance
│    Leaking: NO (View attached)
│    View is part of a window view hierarchy
│    View.mAttachInfo is not null (view attached)
│    View.mWindowAttachCount = 1
│    mContext instance of org.mozilla.fenix.HomeActivity with mDestroyed = false
│    ↓ AndroidComposeView.pointerInputEventProcessor
│                         ~~~~~~~~~~~~~~~~~~~~~~~~~~
├─ androidx.compose.ui.input.pointer.PointerInputEventProcessor instance
│    Leaking: UNKNOWN
│    Retaining 87.2 kB in 2259 objects
│    ↓ PointerInputEventProcessor.hitPathTracker
│                                 ~~~~~~~~~~~~~~
├─ androidx.compose.ui.input.pointer.HitPathTracker instance
│    Leaking: UNKNOWN
│    Retaining 86.8 kB in 2251 objects
│    ↓ HitPathTracker.hitPointerIdsAndNodes
│                     ~~~~~~~~~~~~~~~~~~~~~
├─ androidx.collection.MutableLongObjectMap instance
│    Leaking: UNKNOWN
│    Retaining 86.7 kB in 2247 objects
│    ↓ LongObjectMap.values
│                    ~~~~~~
├─ java.lang.Object[] array
│    Leaking: UNKNOWN
│    Retaining 86.5 kB in 2244 objects
│    ↓ Object[0]
│            ~~~
├─ androidx.collection.MutableObjectList instance
│    Leaking: UNKNOWN
│    Retaining 86.4 kB in 2243 objects
│    ↓ ObjectList.content
│                 ~~~~~~~
├─ java.lang.Object[] array
│    Leaking: UNKNOWN
│    Retaining 86.4 kB in 2242 objects
│    ↓ Object[2]
│            ~~~
├─ androidx.compose.ui.input.pointer.Node instance
│    Leaking: UNKNOWN
│    Retaining 86.0 kB in 2225 objects
│    ↓ Node.modifierNode
│           ~~~~~~~~~~~~
├─ androidx.compose.foundation.ClickableNode instance
│    Leaking: UNKNOWN
│    Retaining 85.6 kB in 2212 objects
│    ↓ Modifier$Node.coordinator
│                    ~~~~~~~~~~~
├─ androidx.compose.ui.node.InnerNodeCoordinator instance
│    Leaking: UNKNOWN
│    Retaining 264 B in 6 objects
│    ↓ NodeCoordinator.layoutNode
│                      ~~~~~~~~~~
├─ androidx.compose.ui.node.LayoutNode instance
│    Leaking: UNKNOWN
│    Retaining 597 B in 15 objects
│    ↓ LayoutNode._foldedParent
│                 ~~~~~~~~~~~~~
├─ androidx.compose.ui.node.LayoutNode instance
│    Leaking: UNKNOWN
│    Retaining 73.3 kB in 2021 objects
│    ↓ LayoutNode._zSortedChildren
│                 ~~~~~~~~~~~~~~~~
├─ androidx.compose.runtime.collection.MutableVector instance
│    Leaking: UNKNOWN
│    Retaining 84 B in 2 objects
│    ↓ MutableVector.content
│                    ~~~~~~~
├─ androidx.compose.ui.node.LayoutNode[] array
│    Leaking: UNKNOWN
│    Retaining 64 B in 1 objects
│    ↓ LayoutNode[1]
│                ~~~
├─ androidx.compose.ui.node.LayoutNode instance
│    Leaking: UNKNOWN
│    Retaining 72.5 kB in 2003 objects
│    ↓ LayoutNode.measurePolicy
│                 ~~~~~~~~~~~~~
├─ androidx.compose.ui.window.AndroidPopup_androidKt$Popup$8$1 instance
│    Leaking: UNKNOWN
│    Retaining 16 B in 1 objects
│    Anonymous class implementing androidx.compose.ui.layout.MeasurePolicy
│    ↓ AndroidPopup_androidKt$Popup$8$1.$popupLayout
│                                       ~~~~~~~~~~~~
╰→ androidx.compose.ui.window.PopupLayout instance
​     Leaking: YES (ObjectWatcher was watching this because androidx.compose.ui.window.PopupLayout received View#onDetachedFromWindow() callback)
​     Retaining 71.6 kB in 1982 objects
​     key = d1e6a830-a583-40a5-b84a-5a89a8fe3df4
​     watchDurationMillis = 5413
​     retainedDurationMillis = 413
​     View not part of a window view hierarchy
​     View.mAttachInfo is null (view detached)
​     View.mWindowAttachCount = 1
​     mContext instance of <redacted-package>.HomeActivity with mDestroyed = false
====================================
0 LIBRARY LEAKS

We're using compose 1.7.8, kotlin version 1.9.24

Our dropdown usage looks like this:

// data class MenuItem(label: String, onClick: () -> Unit)
val menuItems: List<MenuItem> = listOf(....)

DropdownMenu(
  expanded = expanded,
  onDismissRequest = onDismissRequest
) {
  menuItems.forEach {
    DropdownMenuItem(
      onClick = { it.onClick() }
    ) { 
      Text(text = it.text.value) 
    }
  }
}

The issue is also similar to what is reported in b/274016293 (which imo is wrongly marked as a duplicate of b/262356264, and someone else is able to repro this issue even after b/262356264 was fixed.