Assertion failure in Group::attach with core 2.3.0

[jpsim]

Reported by cocoa user: realm/realm-swift#4476

Incident Identifier: 730E4AE6-0217-4518-8C9A-60F1D90F071C
CrashReporter Key:   22517670-5381-424D-BD8D-FBA16F6D5788
Hardware Model:      iPhone7,2
Process:         MyApp [223]
Path:            /var/containers/Bundle/Application/F4002170-D8AD-46D1-B8D2-FA5EFBF239D0/MyApp.app/MyApp
Identifier:      com.MyApp.MyApp
Version:         2.60.01 (1086)
Code Type:       ARM-64
Parent Process:  ??? [1]

Date/Time:       2016-12-21T18:49:03Z
Launch Time:     2016-12-21T18:49:02Z
OS Version:      iPhone OS 10.1.1 (14B100)
Report Version:  104

Exception Type:  SIGABRT
Exception Codes: #0 at 0x18a902014
Crashed Thread:  0

Thread 0 Crashed:
0   libsystem_kernel.dylib               0x000000018a902014 __pthread_kill + 8
1   libsystem_pthread.dylib              0x000000018a9ca450 pthread_kill + 108
2   libsystem_c.dylib                    0x000000018a8763e0 abort + 136
3   Realm                                0x0000000100e8e4dc please_report_this_error_to_help_at_realm_dot_io + 8
4   Realm                                0x0000000100e8e79c realm::util::terminate_internal(std::__1::basic_stringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) + 228
5   Realm                                0x0000000100e8e928 realm::util::terminate(char const*, char const*, long, std::initializer_list<realm::util::Printable>&&) + 364
6   Realm                                0x0000000100d5519c void realm::util::terminate<unsigned long long, unsigned long long>(char const*, char const*, long, unsigned long long, unsigned long long) (terminate.hpp:56)
7   Realm                                0x0000000100f37a80 realm::Group::attach(unsigned long, bool) + 612
8   Realm                                0x0000000100f429b8 realm::SharedGroup::do_begin_read(realm::VersionID, bool) + 72
9   Realm                                0x0000000100f41d70 realm::SharedGroup::begin_read(realm::VersionID) + 32
10  Realm                                0x0000000100e167e8 realm::Realm::read_group() (shared_realm.cpp:228)
11  Realm                                0x0000000100e16608 realm::Realm::init(std::__1::shared_ptr<realm::_impl::RealmCoordinator>) (shared_realm.cpp:93)
12  Realm                                0x0000000100d6d08c realm::_impl::RealmCoordinator::get_realm(realm::Realm::Config) (realm_coordinator.cpp:176)
13  Realm                                0x0000000100e17a00 realm::Realm::get_shared_realm(realm::Realm::Config) (shared_realm.cpp:244)
14  Realm                                0x0000000100dfd144 +[RLMRealm realmWithConfiguration:error:] (RLMRealm.mm:293)
15  RealmSwift                           0x00000001012ecbb0 RealmSwift.Realm.__allocating_init (configuration : RealmSwift.Realm.Configuration) throws -> RealmSwift.Realm (Realm.swift:0)
16  MyApp                                0x00000001004ac36c MyApp.Manager.(getRealm in _53F2332CE3FD43C75AF4C0E7DDDA9E94) () -> RealmSwift.Realm? (Manager.swift:707)
17  MyApp                                0x00000001004b4de8 function signature specialization <Arg[0] = Owned To Guaranteed> of Manager.fetchAll (__ObjC.NSDate) -> () (Manager.swift:138)
18  MyApp                                0x00000001004a97b4 @objc MyApp.Manager.fetchAll (__ObjC.NSDate) -> () (Manager.swift:0)
19  MyApp                                0x0000000100217bc0 -[Summary checkAndUpdateBrandsFromDictionary:] (Summary.m:422)
20  MyApp                                0x00000001002173a8 -[Summary fetchedUserStateSummary:error:backgroundFetchCompletionHandler:] (Summary.m:264)
21  MyApp                                0x0000000100216fb0 __85-[Summary refreshWithBackgroundFetchCompletionHandler:isEnteringForeground:]_block_invoke (Summary.m:206)
22  MyApp                                0x00000001000d8590 APICompletionBlock_block_invoke_5 (APIRequest.m:320)
23  libdispatch.dylib                    0x000000018a7bd200 _dispatch_call_block_and_release + 20
24  libdispatch.dylib                    0x000000018a7bd1c0 _dispatch_client_callout + 12
25  libdispatch.dylib                    0x000000018a7c1d6c _dispatch_main_queue_callback_4CF + 996
26  CoreFoundation                       0x000000018b8dff2c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
27  CoreFoundation                       0x000000018b8ddb18 __CFRunLoopRun + 1656
28  CoreFoundation                       0x000000018b80c048 CFRunLoopRunSpecific + 440
29  GraphicsServices                     0x000000018d292198 GSEventRunModal + 176
30  UIKit                                0x00000001917f82fc -[UIApplication _run] + 680
31  UIKit                                0x00000001917f3034 UIApplicationMain + 204
32  MyApp                                0x00000001000dd0a0 main (main.m:14)
33  libdyld.dylib                        0x000000018a7f05b8 start + 0

[stel]

It seems like there is the same issue in Browser I showed to @rrrlasse .

[rrrlasse]

I can't get anywhere with this bug without .realm file or reproduction.. @stel did you ever get a .realm file?

[stel]

@rrrlasse no, I wasn't able to reproduce that

[nquirl-ps]

I'm experiencing a similar crash that is affecting around 4% of our users. It appears to occur more on lower end devices such as iPhone SE but also occurs on most other devices. I have not been able to reproduce the crash locally but we're seeing it a lot through Crashlytics

Realm 2.9.1

Date: 2017-08-14T13:50:00Z

OS Version: 10.3.3 (14G60)

Device: iPhone 7 Plus

RAM Free: 39.6%

Disk Free: 70%

#0. Crashed: com.apple.main-thread
0 libsystem_kernel.dylib 0x184b51014 __pthread_kill + 8
1 libsystem_pthread.dylib 0x184c1b264 pthread_kill + 112
2 libsystem_c.dylib 0x184ac59c4 abort + 140
3 Realm 0x100be0328 realm::util::terminate(char const*, char const*, long) + 10
4 Realm 0x100be080c hidden#10793 + 776
5 libsystem_pthread.dylib 0x184c1b264 pthread_kill + 112
6 Realm 0x100be0bbc realm::util::terminate_with_info(char const*, char const*, long, char const*, std::initializer_listrealm::util::Printable&&) + 452
7 Realm 0x100b733ac void realm::util::terminate_with_info<unsigned long&, unsigned long&>(char const*, int, char const*, char const*, unsigned long&&&, unsigned long&&&) + 62
8 Realm 0x100c8bd1c realm::Group::attach(unsigned long, bool) + 172
9 Realm 0x100c96cfc realm::SharedGroup::do_begin_read(realm::VersionID, bool) + 76
10 Realm 0x100c960c8 realm::SharedGroup::begin_read(realm::VersionID) + 36
11 Realm 0x100b4579c realm::Realm::begin_read(realm::VersionID) (_hidden#7994:213)
12 Realm 0x100b44aec realm::Realm::read_group() (_hidden#7994:202)
13 Realm 0x100b44168 realm::Realm::Realm(realm::Realm::Config, std::__1::shared_ptrrealm::_impl::RealmCoordinator) (_hidden#82:4045)
14 Realm 0x100a910d4 hidden#1858 (_hidden#82:4604)
15 Realm 0x100a90f5c hidden#1853 (_hidden#82:4604)
16 Realm 0x100a8d148 realm::_impl::RealmCoordinator::get_realm(realm::Realm::Config) (_hidden#82:4326)
17 Realm 0x100b45a9c realm::Realm::get_shared_realm(realm::Realm::Config) (_hidden#675:148)
18 Realm 0x100b226f8 hidden#6436 (_hidden#6540:365)
19 Realm 0x100b215cc hidden#6421 (_hidden#6540:173)
20 TPS Protect 0x1000c77f0 hidden#6149 (_hidden#6363:63)
21 TPS Protect 0x1000c271c hidden#6047 (_hidden#6363)
22 UIKit 0x18bcf9e48 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 380
23 UIKit 0x18bf0637c -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 3452
24 UIKit 0x18bf0be24 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1684
25 UIKit 0x18bf208b0 __84-[UIApplication _handleApplicationActivationWithScene:transitionContext:completion:]_block_invoke.3147 + 48
26 UIKit 0x18bf090b8 -[UIApplication workspaceDidEndTransaction:] + 168
27 FrontBoardServices 0x187700884 FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 36
28 FrontBoardServices 0x1877006f0 -[FBSSerialQueue _performNext] + 176
29 FrontBoardServices 0x187700aa0 -[FBSSerialQueue _performNextFromRunLoopSource] + 56
30 CoreFoundation 0x185b0542c CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24
31 CoreFoundation 0x185b04d9c __CFRunLoopDoSources0 + 540
32 CoreFoundation 0x185b029a8 __CFRunLoopRun + 744
33 CoreFoundation 0x185a32da4 CFRunLoopRunSpecific + 424
34 UIKit 0x18bcf2fc8 -[UIApplication _run] + 652
35 UIKit 0x18bcedc9c UIApplicationMain + 208
36 TPS Protect 0x100082ae4 main (_hidden#1859:22)
37 libdyld.dylib 0x184a4159c start + 4

[finnschiermer]

@nquirl-ps Is there anything you can tell us which could help us reproduce the problem?

[nquirl-ps]

@finnschiermer - One of our internal testers may have found some information to reproduce this. I'm collecting the info and will send it along once I can get it

[bmunkholm]

old.