App crashes: AWSAppSync $s10AWSAppSync36AWSCognitoUserPoolsAuthProviderAsyncPAAE09getLatestF5TokenSSyF

[zhouhao27]

Describe the bug
App crashes: App crashes: AWSAppSync $s10AWSAppSync36AWSCognitoUserPoolsAuthProviderAsyncPAAE09getLatestF5TokenSSyF

Call stacks:

Crashed: com.amazonaws.AppSyncRealTimeConnectionProvider.serialQueue
0  libswiftCore.dylib             0x31fd0 _assertionFailure(_:_:file:line:flags:) + 304
1  AWSAppSync                     0x1bf78 $s10AWSAppSync36AWSCognitoUserPoolsAuthProviderAsyncPAAE09getLatestF5TokenSSyF + 84
2  AWSAppSync                     0x13690 $s10AWSAppSync03AppB30RealTimeClientOIDCAuthProviderC18getLatestAuthTokens6ResultOySSs5Error_pGyF + 816
3  AWSAppSync                     0x1376c $s10AWSAppSync03AppB30RealTimeClientOIDCAuthProviderC0cbdeF00gH0AadEP18getLatestAuthTokens6ResultOySSs5Error_pGyFTW + 20
4  AppSyncRealTimeClient          0x150a0 $s21AppSyncRealTimeClient19OIDCAuthInterceptorC19interceptConnection_3forAA0abI7RequestVAG_10Foundation3URLVtF + 392
5  AppSyncRealTimeClient          0x157c0 $s21AppSyncRealTimeClient19OIDCAuthInterceptorCAA010ConnectionG0A2aDP09interceptH0_3forAA0abH7RequestVAI_10Foundation3URLVtFTW + 20
6  AppSyncRealTimeClient          0x16584 $s21AppSyncRealTimeClient26RealtimeConnectionProviderC7connectyyFyycfU_ + 596
7  AppSyncRealTimeClient          0x15f50 $sIeg_IeyB_TR + 28
8  libdispatch.dylib              0x63094 _dispatch_call_block_and_release + 24
9  libdispatch.dylib              0x64094 _dispatch_client_callout + 16
10 libdispatch.dylib              0xa738 _dispatch_lane_serial_drain$VARIANT$mp + 644
11 libdispatch.dylib              0xb1f0 _dispatch_lane_invoke$VARIANT$mp + 408
12 libdispatch.dylib              0x14ec4 _dispatch_workloop_worker_thread + 632
13 libsystem_pthread.dylib        0x1e10 _pthread_wqthread + 284
14 libsystem_pthread.dylib        0x193c start_wqthread + 8

To Reproduce
Not reproducible. It happens randomly.

Expected behavior
Should not crash

Screenshots
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Environment(please complete the following information):

• AppSync SDK Version: 3.6.1
• Dependency Manager: Cocoapods
• Swift Version : 5.1

Device Information (please complete the following information):

• Device: iPhone 6s Plus
• iOS Version: 15.6.1
• Specific to simulators:

Additional context
Add any other context about the problem here.

[atierian]

Thanks for opening this. Can you please provide the full crash report? It contains important information to help track this down.