Exception java.lang.NullPointerException: Parameter specified as non-null is null: method com.facebook.react.bridge.queue.MessageQueueThreadImpl.runOnQueue, parameter runnable #54983
Description
Description
This appears to be a reappearance of #44842, to which a fix was added here: #44852
Much like that one, it's unclear how to reproduce (sorry)
In the Play Console crashes, we can see this:
Exception java.lang.NullPointerException: Parameter specified as non-null is null: method com.facebook.react.bridge.queue.MessageQueueThreadImpl.runOnQueue, parameter runnable
This is our largest source of user-perceived crashes by a good margin.
While I don't have steps to reproduce or a reproducer, I do have have a fix that we rolled out at scale that seems to have worked - we rolled out a fix in version 1.112.0 and no longer see the issue (PR here: bluesky-social/social-app#9436)
Filtering to the version with the experimental fix:
What I think is going on, and the fix
The original fix was to capture the value of mCurrentIdleCallbackRunnable to a local variable before calling cancel():
cortinico@54df8fc
Then, the file got converted to Kotlin, where it has optional chaining syntax that handle it automatically.
currentIdleCallbackRunnable?.cancel()
currentIdleCallbackRunnable = IdleCallbackRunnable(frameTimeNanos)
reactApplicationContext.runOnJSQueueThread(currentIdleCallbackRunnable)However, to my eyes, it seems the next two lines of code have the same problem as before:
currentIdleCallbackRunnable?.cancel() // yay, no longer crashes!
currentIdleCallbackRunnable = IdleCallbackRunnable(frameTimeNanos) // writes to currentIdleCallbackRunnable
reactApplicationContext.runOnJSQueueThread(currentIdleCallbackRunnable) // ‼️ reads from currentIdleCallbackRunnableSince currentIdleCallbackRunnable apparently has a habit of being changed out from under you, we should probably do the same local capture thing as last time, to ensure we're passing the correct thing to runOnJSQueueThread
val idleCallbackRunnable = IdleCallbackRunnable(frameTimeNanos)
currentIdleCallbackRunnable = idleCallbackRunnable
reactApplicationContext.runOnJSQueueThread(idleCallbackRunnable)This is the fix I put into production - I have opened a PR for it here. That said, I don't know if this is the correct fix - maybe a mutex or something is needed?
Steps to reproduce
Unknown
React Native Version
0.81.5
Affected Platforms
Runtime - Android
Output of npx @react-native-community/cli info
System:
OS: macOS 15.7
CPU: (14) arm64 Apple M4 Pro
Memory: 303.97 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: ~/.nvm/versions/node/v20.19.4/bin/yarn
npm:
version: 10.8.2
path: ~/.nvm/versions/node/v20.19.4/bin/npm
Watchman:
version: 2025.12.22.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.16.2
path: /opt/homebrew/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 25.2
- iOS 26.2
- macOS 26.2
- tvOS 26.2
- visionOS 26.2
- watchOS 26.2
Android SDK:
API Levels:
- "29"
- "33"
- "34"
- "35"
- "36"
Build Tools:
- 30.0.3
- 34.0.0
- 35.0.0
- 35.0.1
- 36.0.0
System Images:
- android-29 | Google Play ARM 64 v8a
- android-30 | Google APIs ARM 64 v8a
- android-35 | Google Play ARM 64 v8a
- android-36 | Google Play ARM 64 v8a
Android NDK: Not Found
IDEs:
Android Studio: 2025.1 AI-251.27812.49.2514.14217341
Xcode:
version: 26.2/17C52
path: /usr/bin/xcodebuild
Languages:
Java:
version: 17.0.17
path: /usr/bin/javac
Ruby:
version: 2.7.6
path: /Users/samuel/.rbenv/shims/ruby
npmPackages:
"@react-native-community/cli": Not Found
react:
installed: 19.1.0
wanted: 19.1.0
react-native:
installed: 0.81.5
wanted: 0.81.5
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: Not found
newArchEnabled: Not found
iOS:
hermesEnabled: Not found
newArchEnabled: Not found
Stacktrace or Logs
Exception java.lang.NullPointerException: Parameter specified as non-null is null: method com.facebook.react.bridge.queue.MessageQueueThreadImpl.runOnQueue, parameter runnable
at com.facebook.react.bridge.queue.MessageQueueThreadImpl.runOnQueue (Unknown Source:2)
at com.facebook.react.bridge.ReactContext.runOnJSQueueThread (ReactContext.java:415)
at com.facebook.react.modules.core.JavaTimerManager$IdleFrameCallback.doFrame (JavaTimerManager.kt:317)
at com.facebook.react.modules.core.ReactChoreographer.frameCallback$lambda$1 (ReactChoreographer.kt:59)
at com.facebook.react.modules.core.ReactChoreographer.$r8$lambda$nSkFhrr5T7rop_XKwzlLov4NLLw (Unknown Source)
at com.facebook.react.modules.core.ReactChoreographer$$ExternalSyntheticLambda0.doFrame (D8$$SyntheticClass)
at android.view.Choreographer$CallbackRecord.run (Choreographer.java:1229)
at android.view.Choreographer$CallbackRecord.run (Choreographer.java:1239)
at android.view.Choreographer.doCallbacks (Choreographer.java:899)
at android.view.Choreographer.doFrame (Choreographer.java:827)
at android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:1214)
at android.os.Handler.handleCallback (Handler.java:984)
at android.os.Handler.dispatchMessage (Handler.java:104)
at android.os.Looper.loopOnce (Looper.java:238)
at android.os.Looper.loop (Looper.java:357)
at android.app.ActivityThread.main (ActivityThread.java:8149)
at java.lang.reflect.Method.invoke
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:957)
MANDATORY Reproducer
https://github.com/bluesky-social/social-app
Screenshots and Videos
No response