In my App, Crashlytics is used to gather crash reports from users. Here is one crash report from a user. It is possibly depending on the contacts informations of the user. I can not recreate the crash, as I do not know what's in his/her contacts. Does any one has an idea about this situation?

com.apple.root.default-priority Crashed
0    CoreFoundation  CFStringCreateCopy + 13
1    AppSupport  CPSqliteDatabaseCreateWithPath + 36
2    AppSupport  CPSqliteDatabaseCreateWithPath + 36
3    AppSupport  CPRecordStoreGetDatabase + 16
4    AppSupport  _getReaderConnection + 10
5    AppSupport  CPRecordStoreProcessQueryWithBindBlock + 22
6    AppSupport  CPRecordStoreCopyAllInstancesOfClassWhereWithBindBlock + 98
7    AddressBook     ABCCopyArrayOfAllPeopleInSourceWithSortOrdering + 244
8    SeeYouKee  PhoneNumberInputViewController.m line 538-[PhoneNumberInputViewController dofetchContacts:]
9    AddressBook     __37-[ABTCC accessRequestWithCompletion:]_block_invoke_0 + 26
10   TCC     __TCCAccessRequest_block_invoke_038 + 316
11 ...   libxpc.dylib    _xpc_connection_call_reply + 26
12   libdispatch.dylib   _dispatch_root_queue_drain + 278
13   libdispatch.dylib   _dispatch_worker_thread2 + 92
14   libsystem_c.dylib   _pthread_wqthread + 360

The code for 8 SeeYouKee PhoneNumberInputViewController.m line 538-[PhoneNumberInputViewController dofetchContacts:] is:

NSArray *contactsInAddressBook = CFBridgingRelease(ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering(addressBook, nil, kABPersonSortByLastName));

EDIT 1

-(void)dofetchContacts:(ABAddressBookRef)addressBook{
NSMutableArray *contactMutArr = [NSMutableArray array];
NSMutableString *mStrOfContacts = [NSMutableString string];

NSArray *contactsInAddressBook = CFBridgingRelease(ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering(addressBook, nil, kABPersonSortByLastName));

if (ABPersonGetComp
ios crash-reports abaddressbook
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