getUserData iOS crash

FMOD Engine
1

Hi!
We are currently encountering crashes on iOS devices only, 3% of our players encountering it.
It appears that this issue is tied to a specific state: 100% of devices are in background state. Most of crashes are on iOS 18+, near 10% are iOS 16+
The FMOD version is 2.02.19
Thank you in advance!

Here is the stack trace:

Crashed: FMOD Studio update thread

EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x00000000001f4bbc

Crashed: FMOD Studio update thread
0  UnityFramework                 0x3d3d2a4 FMOD_Studio_CommandReplay_SetUserData + 404064
1  UnityFramework                 0x3d3d298 FMOD_Studio_CommandReplay_SetUserData + 404052
2  UnityFramework                 0x3d42c58 FMOD_Studio_CommandReplay_SetUserData + 427028
3  UnityFramework                 0x3d3a394 FMOD_Studio_CommandReplay_SetUserData + 392016
4  UnityFramework                 0x3d8ec70 FMOD_Studio_CommandReplay_SetUserData + 738348
5  UnityFramework                 0x3d11460 FMOD_Studio_CommandReplay_SetUserData + 224284
6  UnityFramework                 0x3d29838 FMOD_Studio_CommandReplay_SetUserData + 323572
7  UnityFramework                 0x3d288d8 FMOD_Studio_CommandReplay_SetUserData + 319636
8  UnityFramework                 0x3d29c50 FMOD_Studio_CommandReplay_SetUserData + 324620
9  UnityFramework                 0x3e9d49c FMOD5_Reverb3D_GetUserData + 645312
10 UnityFramework                 0x3e7dde8 FMOD5_Reverb3D_GetUserData + 516620
11 libsystem_pthread.dylib        0x3344 _pthread_start + 136
12 libsystem_pthread.dylib        0xab8 thread_start + 8
2

Hi,

Thanks for the call stack and info.

There was an addition in 2.02.24 that suspends the mixer on all threads: FMOD Engine | Detailed Revision History. Suspending the mixer will reduce the CPU usage to 0% while maintaining FMOD state: FMOD Engine | Core Api System - System::Mixersuspend. We have also added some more docs here for how to use the suspend/resume functions: FMOD Engine | Platforms Ios - Suspend In Background.

Could I also please grab your Unity version?

3

Hi!
Thank you for your quick response!

The Unity version is 2022.3.49f1

Do you mean the FMOD version 2.02.19 could leave to such kind of crash?
Do you have any idea how to reproduce the crash?