[Bug] Crash on Quit when using Analytics, Crashlytics, and Remote Config

[a-maurice]

[REQUIRED] Please fill in the following fields:

• Unity editor version: unity 2020.3.22f1 (but seems like all)
• Firebase Unity SDK version: Since 8.6.1
• Source you installed the SDK: unitypackage
• Problematic Firebase Component: Analytics, Crashlytics, and Remote Config
• Other Firebase Components in use: N/A
• Additional SDKs you are using: Unknown
• Platform you are using the Unity editor on: Mac
• Platform you are targeting: Android
• Scripting Runtime: IL2CPP
• Pre-built SDK from the website or open-source from this repo: Prebuilt

[REQUIRED] Please describe the issue here:

(Please list the full steps to reproduce the issue. Include device logs, Unity logs, and stack traces if available.)

Steps to reproduce:

One of the issues flagged in firebase/quickstart-unity#1193 (comment). It seems like there is a problem when the application is shutting down that can result in a crash. There are a variety of users with different reports, but nothing concrete on reproduction steps, but the most relevant apis are Analytics, Crashlytics, and possibly Remote Config (though it isn't always included).

A possible way to reproduce the problem is adding a call to Unity's Application.Quit(), and watching the logs to see if anything odd appears.

[shefich]

@a-maurice which call or logs should be added?

Meanwhile I can see such errors OnApplicationQuit after almost everything destroyed:
For Unity 2021:
`Crashed: Thread #1
SIGSEGV 0x000000000000013a
0 libunity.so
JobQueue::WaitForJobGroupID(JobGroupID, JobQueue::JobQueueWorkStealMode)

1 libunity.so
__ashldi3
2 libunity.so
__ashldi3
3 libunity.so
CompleteFenceInternal(JobFence&, WorkStealMode)
4 libunity.so
AsyncUploadManager::~AsyncUploadManager()
5 libunity.so
__ashldi3
6 libunity.so
AsyncUploadManager::StaticDestroy(void*)
7 libunity.so
RegisterRuntimeInitializeAndCleanup::ExecuteCleanup()
8 libunity.so
UnityTimeToUnixTime(DateTime const&, long&)
9 libc.so
(Missing UUID 98d22ed69dca1afbfed9c2da3b49ce91)
10 libunity.so
RuntimeCleanup()
11 libunity.so
operator delete(void*)
12 libunity.so
unwindstack::MapInfo::~MapInfo()
13 libunity.so
__ashldi3
14 libunity.so
unwindstack::Maps::Clear()
15 libunity.so
UnityFinalDeinitApplication()
16 libunity.so
nativeDone(_JNIEnv*, _jobject*)
17 (Missing)
29 (Missing)
30 libunity.so
__ashldi3
31 (Missing)
63 libart.so
(Missing UUID b5fc7fc369f2cabea0a1e9a49518ab60)`

For Unity 2020 and earlier:
`Crashed: Thread #1

SIGSEGV 0x0000000000000154

0 libunity.so
nativeDone(_JNIEnv*, _jobject*)

1 libunity.so
nativeDone(_JNIEnv*, _jobject*)

2 (Missing)`

[a-maurice]

@shefich One potential setting that might help is adding:

Firebase.FirebaseApp.LogLevel = Firebase.LogLevel.Debug;

which will make the logs include more debug information. Though I suspect part of the fix will require deeper debugging, which is why we haven't been able to identify the root cause yet.

[shefich]

Hi @a-maurice,
"Firebase.LogLevel.Debug" doesn't helps to have more logs.
Many errors connected too the "libmonochrome.so".
Here's stacktrace with other thread/library:
issue_b0331e86d965953967fab1ff4abe0d07_crash_session_63a91b24017c00015e2f1c6078cf81de_DNE_0_v2_stacktrace (1).txt

Tell me please, if it helps.