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Firebase 6.27.0 crashes on FIRCLSFileWriteString #6048

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@ab-rdarts

Description

@ab-rdarts

[REQUIRED] Step 1: Describe your environment

  • Xcode version: 11.5
  • Firebase SDK version: 6.27.0
  • Firebase Component: Crashlytics
  • Component version: 4.2.0
  • Installation method: CocoaPods

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

We see crashes on user devices related to Firebase components in our application in production mode. It's strange that these crashes appear only in Xcode organizer. Crashed thread looks like this:

Thread 9 name: Thread 9 Crashed: 0 libsystem_platform.dylib 0x00000001ba4c6384 _platform_strlen + 4 1 61.06.100 0x00000001014d4850 FIRCLSFileWriteString + 32 (FIRCLSFile.m:334) 2 61.06.100 0x00000001014d481c FIRCLSFileWriteHashEntryString + 36 (FIRCLSFile.m:535) 3 61.06.100 0x00000001014cd650 FIRCLSContextRecordMetadata + 248 (FIRCLSContext.m:405) 4 61.06.100 0x00000001014cd520 __FIRCLSContextInitialize_block_invoke_5 + 104 (FIRCLSContext.m:230) 5 libdispatch.dylib 0x00000001ba2f3a38 _dispatch_call_block_and_release + 24 (init.c:1372) 6 libdispatch.dylib 0x00000001ba2f47d4 _dispatch_client_callout + 16 (object.m:511) 7 libdispatch.dylib 0x00000001ba298d8c _dispatch_queue_override_invoke + 952 (inline_internal.h:2427) 8 libdispatch.dylib 0x00000001ba2a5030 _dispatch_root_queue_drain + 372 (inline_internal.h:2482) 9 libdispatch.dylib 0x00000001ba2a58d4 _dispatch_worker_thread2 + 128 (queue.c:6072) 10 libsystem_pthread.dylib 0x00000001ba4d51b4 _pthread_wqthread + 464 (pthread.c:2361) 11 libsystem_pthread.dylib 0x00000001ba4d7cd4 start_wqthread + 4 

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