firebase
[firebase_auth]: java.util.ConcurrentModificationException
[READ] Step 1: Are you in the right place?
Issues filed here should be about bugs in the code in this repository. If you have a general question, need help debugging, or fall into some other category use one of these other channels:
- For general technical questions, post a question on StackOverflow with the firebase tag.
- For general Firebase discussion, use the firebase-talk google group.
- For help troubleshooting your application that does not fall under one of the above categories, reach out to the personalized Firebase support channel.
[REQUIRED] Step 2: Describe your environment
- Android Studio version: Android Studio Koala Feature Drop | 2024.1.2 Patch 1 Non-Bundled Plugins: Dart (241.18968.26) io.flutter (85.0.1)
- Firebase Component: firebase_core, firebase_auth
- Component version: 4.0.0, 6.0.0
[REQUIRED] Step 3: Describe the problem
Steps to reproduce:
Issue was previously opened https://github.com/firebase/firebase-android-sdk/issues/5643 however is closed and locked now.
Please check the stacktrace below reported via firebase crashlytics.
Device Brand:Motorola Model:Moto G15 Orientation:Portrait RAM free: 1.03 GB Disk free: 175.02 GB Operating System Version:Android 15 Orientation:Portrait Rooted: No Crash Date:Sep 11, 2025, 11:58:24 PM
I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.
Hi @rohansohonee1, thank you for reaching I tried reproducing the issue, however, I wasn't able to encounter the error. By any chance, were you able to reproduce the issue? Could you share code snippet that might've trigger the exception? Thanks!
@lehcar09 Issue is from our users. I don't have the reproducible steps for this crash.
Got it. Based on stacktrace, it looks to me that this is a race condition. I’ll raise this to our engineers and see what we can do here. Thanks!