facebook::react::FabricUIManagerBinding::reportMount

[Willham12]

Description

Android ANR

Steps to reproduce

It's a firebase log

React Native Version

0.81.1

Affected Platforms

Runtime - Android

Areas

TurboModule - The New Native Module System

Output of npx @react-native-community/cli info

System:
  OS: macOS 15.6.1
  CPU: (14) arm64 Apple M4 Pro
  Memory: 125.42 MB / 48.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.19.4
    path: ~/.nvm/versions/node/v20.19.4/bin/node
  Yarn:
    version: 1.22.22
    path: /opt/homebrew/bin/yarn
  npm:
    version: 10.8.2
    path: ~/.nvm/versions/node/v20.19.4/bin/npm
  Watchman:
    version: 2025.07.28.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.5
      - iOS 18.5
      - macOS 15.5
      - tvOS 18.5
      - visionOS 2.5
      - watchOS 11.5
  Android SDK:
    API Levels:
      - "28"
      - "33"
      - "34"
      - "35"
      - "36"
    Build Tools:
      - 33.0.0
      - 33.0.1
      - 34.0.0
      - 35.0.0
      - 35.0.0
      - 35.0.1
      - 36.0.0
    System Images:
      - android-33 | Google APIs Intel x86_64 Atom
      - android-34 | Google APIs Intel x86_64 Atom
      - android-34 | Google Play Intel x86_64 Atom
      - android-36 | Google APIs Intel x86_64 Atom
      - android-36 | Google Play ARM 64 v8a
      - android-36 | Google Play Intel x86_64 Atom
    Android NDK: Not Found
IDEs:
  Android Studio: 2025.1 AI-251.26094.121.2512.13840223
  Xcode:
    version: 16.4/16F6
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 21.0.8
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 20.0.1
    wanted: 20.0.1
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.81.1
    wanted: 0.81.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

main (runnable):tid=1 systid=30903 
#00 pc 0x4ca2ec libart.so (art::DumpNativeStack + 108) (BuildId: 80d2ab18f9d259d8e546c1e6bae752b1)
#01 pc 0x4342b4 libart.so (art::Thread::DumpStack const + 436) (BuildId: 80d2ab18f9d259d8e546c1e6bae752b1)
#02 pc 0x433fd0 libart.so (art::DumpCheckpoint::Run + 120) (BuildId: 80d2ab18f9d259d8e546c1e6bae752b1)
#03 pc 0x28e190 libart.so (art::Thread::RunCheckpointFunction + 144) (BuildId: 80d2ab18f9d259d8e546c1e6bae752b1)
#04 pc 0x637518 libart.so (art::JNI<false>::NewLocalRef + 568) (BuildId: 80d2ab18f9d259d8e546c1e6bae752b1)
#05 pc 0x2a5690 split_config.arm64_v8a.apk (facebook::react::FabricUIManagerBinding::reportMount + 788) (BuildId: a1b4dd2f3237aa45)
#06 pc 0x2af714 split_config.arm64_v8a.apk (facebook::jni::detail::MethodWrapper<void , &facebook::react::FabricUIManagerBinding::reportMount, facebook::react::FabricUIManagerBinding, void, int>::dispatch + 64) (BuildId: a1b4dd2f3237aa45)
#07 pc 0x2aefa8 split_config.arm64_v8a.apk + 11649024 (BuildId: a1b4dd2f3237aa45)
       at com.facebook.react.fabric.FabricUIManagerBinding.reportMount(FabricUIManagerBinding.kt)
       at com.facebook.react.fabric.FabricUIManager$MountItemDispatchListener$1.run(FabricUIManager.java:1374)
       at android.os.Handler.handleCallback(Handler.java:958)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loopOnce(Looper.java:205)
       at android.os.Looper.loop(Looper.java:294)
       at android.app.ActivityThread.main(ActivityThread.java:8177)
       at java.lang.reflect.Method.invoke(Native method)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)

MANDATORY Reproducer

https://github.com/facebook/react-native/issues

Screenshots and Videos

No response

[react-native-bot]

Warning

Missing reproducer: We could not detect a reproducible example in your issue report. Reproducers are mandatory and we can accept only one of those as a valid reproducer:

• For majority of bugs: send us a Pull Request with the RNTesterPlayground.js edited to reproduce your bug.
• If your bug is UI related: a Snack
• If your bug is build/upgrade related: a project using our Reproducer Template

You can read more about about it on our website: How to report a bug.

[cortinico]

Missing reproducer, we can't really help here