[Android] Attempt to invoke virtual method 'java.lang.String java.util.UUID.toString()' on a null object reference

[caseycrogers]

Version

4.1.0

Steps to Reproduce

1. flutter pub add posthog_flutter
2. Run on Android

Expected Result

App does not crash

Actual Result

App crashes and exits on launch.

Tested on real devices. Appearing in prod (I was dumb enough to ship the build while only having QA'd it on iOS, rollback is already inflight). Does not appear to be occurring on iOS.

Error log:

E/AndroidRuntime(32150): FATAL EXCEPTION: main
E/AndroidRuntime(32150): Process: com.dribble_game_mobile, PID: 32150
E/AndroidRuntime(32150): java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.util.UUID.toString()' on a null object reference
E/AndroidRuntime(32150):    at com.posthog.PostHog.buildProperties(PostHog.kt:256)
E/AndroidRuntime(32150):    at com.posthog.PostHog.capture(PostHog.kt:344)
E/AndroidRuntime(32150):    at com.posthog.PostHog$Companion.capture(PostHog.kt:743)
E/AndroidRuntime(32150):    at com.posthog.PostHogInterface$DefaultImpls.capture$default(PostHogInterface.kt:27)
E/AndroidRuntime(32150):    at com.posthog.android.internal.PostHogLifecycleObserverIntegration.onStart(PostHogLifecycleObserverIntegration.kt:57)
E/AndroidRuntime(32150):    at androidx.lifecycle.DefaultLifecycleObserverAdapter.onStateChanged(DefaultLifecycleObserverAdapter.kt:25)
E/AndroidRuntime(32150):    at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.kt:314)
E/AndroidRuntime(32150):    at androidx.lifecycle.LifecycleRegistry.forwardPass(LifecycleRegistry.kt:251)
E/AndroidRuntime(32150):    at androidx.lifecycle.LifecycleRegistry.sync(LifecycleRegistry.kt:287)
E/AndroidRuntime(32150):    at androidx.lifecycle.LifecycleRegistry.moveToState(LifecycleRegistry.kt:136)
E/AndroidRuntime(32150):    at androidx.lifecycle.LifecycleRegistry.handleLifecycleEvent(LifecycleRegistry.kt:119)
E/AndroidRuntime(32150):    at androidx.lifecycle.ProcessLifecycleOwner.activityStarted$lifecycle_process_release(ProcessLifecycleOwner.kt:97)
E/AndroidRuntime(32150):    at androidx.lifecycle.ProcessLifecycleOwner$attach$1$onActivityPreCreated$1.onActivityPostStarted(ProcessLifecycleOwner.kt:160)
E/AndroidRuntime(32150):    at android.app.Activity.dispatchActivityPostStarted(Activity.java:1499)
E/AndroidRuntime(32150):    at android.app.Activity.performStart(Activity.java:9032)
E/AndroidRuntime(32150):    at android.app.ActivityThread.handleStartActivity(ActivityThread.java:4198)
E/AndroidRuntime(32150):    at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:225)
E/AndroidRuntime(32150):    at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:205)
E/AndroidRuntime(32150):    at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:177)
E/AndroidRuntime(32150):    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:98)
E/AndroidRuntime(32150):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
E/AndroidRuntime(32150):    at android.os.Handler.dispatchMessage(Handler.java:106)
E/AndroidRuntime(32150):    at android.os.Looper.loopOnce(Looper.java:230)
E/AndroidRuntime(32150):    at android.os.Looper.loop(Looper.java:319)
E/AndroidRuntime(32150):    at android.app.ActivityThread.main(ActivityThread.java:8913)
E/AndroidRuntime(32150):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(32150):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
E/AndroidRuntime(32150):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)

[marandaneto]

@caseycrogers thanks for raising this, checking it right now.

[marandaneto]

Found out https://github.com/PostHog/posthog-android/pull/107/

[marandaneto]

https://github.com/PostHog/posthog-android/releases/tag/3.1.13 fixed it, it might take a few minutes to get the artifacts in maven central.