IssueTracker

Component used: Fragment Version used: 1.3.0-beta01 Devices/Android versions reproduced on: Samsung S6, API 23

I'm noticing after started using the new FragmentManager implementation, LeakCanary started complaining many times about leaks coming from mAnimationInfo. Unfortunately I only have Leak Canary traces to show.

Once I disable the new FM implementation, I don't see these leaks anymore.

┬───
│ GC Root: System class
│
├─ leakcanary.internal.InternalLeakCanary class
│    Leaking: NO (MainActivity↓ is not leaking and a class is never leaking)
│    ↓ static InternalLeakCanary.resumedActivity
├─ com.example.android.main.MainActivity instance
│    Leaking: NO (NavHostFragment↓ is not leaking and Activity#mDestroyed is
│    false)
│    mApplication instance of com.example.android.ExampleApplication
│    mBase instance of androidx.appcompat.view.ContextThemeWrapper, not
│    wrapping known Android context
│    ↓ MainActivity.mActivityResultRegistry
├─ androidx.activity.ComponentActivity$2 instance
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    Anonymous subclass of androidx.activity.result.ActivityResultRegistry
│    this$0 instance of com.example.android.main.MainActivity with
│    mDestroyed = false
│    ↓ ComponentActivity$2.mKeyToCallback
├─ java.util.HashMap instance
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    ↓ HashMap.table
├─ java.util.HashMap$HashMapEntry[] array
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    ↓ HashMap$HashMapEntry[].[26]
├─ java.util.HashMap$HashMapEntry instance
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    ↓ HashMap$HashMapEntry.value
├─ androidx.activity.result.ActivityResultRegistry$CallbackAndContract instance
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    ↓ ActivityResultRegistry$CallbackAndContract.mCallback
├─ androidx.fragment.app.FragmentManager$11 instance
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    Anonymous class implementing androidx.activity.result.
│    ActivityResultCallback
│    ↓ FragmentManager$11.this$0
├─ androidx.fragment.app.FragmentManagerImpl instance
│    Leaking: NO (NavHostFragment↓ is not leaking)
│    ↓ FragmentManagerImpl.mParent
├─ androidx.navigation.fragment.NavHostFragment instance
│    Leaking: NO (Fragment#mFragmentManager is not null)
│    Fragment.mTag=bottomNavigation#3
│    ↓ NavHostFragment.mAnimationInfo
│                      ~~~~~~~~~~~~~~
├─ androidx.fragment.app.Fragment$AnimationInfo instance
│    Leaking: UNKNOWN
│    Retaining 27605 bytes in 542 objects
│    ↓ Fragment$AnimationInfo.mFocusedView
│                             ~~~~~~~~~~~~
├─ androidx.recyclerview.widget.RecyclerView instance
│    Leaking: UNKNOWN
│    Retaining 27519 bytes in 541 objects
│    View not part of a window view hierarchy
│    View.mAttachInfo is null (view detached)
│    View.mID = R.id.recycler_view
│    View.mWindowAttachCount = 1
│    mContext instance of com.example.android.main.MainActivity with
│    mDestroyed = false
│    ↓ RecyclerView.mParent
│                   ~~~~~~~
├─ android.widget.FrameLayout instance
│    Leaking: UNKNOWN
│    Retaining 22160 bytes in 414 objects
│    View not part of a window view hierarchy
│    View.mAttachInfo is null (view detached)
│    View.mID = R.id.null
│    View.mWindowAttachCount = 1
│    mContext instance of com.example.android.main.MainActivity with
│    mDestroyed = false
│    ↓ FrameLayout.mParent
│                  ~~~~~~~
╰→ android.widget.LinearLayout instance
​     Leaking: YES (ObjectWatcher was watching this because com.example.
​     android.feature.account.PushNotificationsFragment received
​     Fragment#onDestroyView() callback (references to its views should be
​     cleared to prevent leaks))
​     Retaining 19872 bytes in 377 objects
​     key = 3d944432-e0dc-46e2-b297-3293be17b99a
​     watchDurationMillis = 13188
​     retainedDurationMillis = 8187
​     View not part of a window view hierarchy
​     View.mAttachInfo is null (view detached)
​     View.mWindowAttachCount = 1
​     mContext instance of com.example.android.main.MainActivity with
​     mDestroyed = false

METADATA

Build.VERSION.SDK_INT: 24
Build.MANUFACTURER: samsung
LeakCanary version: 2.5
App process name: com.example.mobile.staging
Stats: LruCache[maxSize=3000,hits=4248,misses=64203,hitRate=6%]
RandomAccess[bytes=3250168,reads=64203,travel=63653025127,range=22970459,size=40
276095]
Analysis duration: 8716 ms