Crash on write

[liakhandrii]

Goals

Write an object to Realm.

Expected Results

Object is saved and the app continues working.

Actual Results

The app crashes with this stack trace:

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff6d7c547a __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff6d882707 pthread_kill + 384
2   libsystem_c.dylib             	0x00007fff6d74da08 abort + 120
3   org.cocoapods.Realm           	0x000000010b847099 please_report_this_error_to_help_at_realm_dot_io + 9
4   org.cocoapods.Realm           	0x000000010b84735c realm::util::terminate_internal(std::__1::basic_stringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) + 140
5   org.cocoapods.Realm           	0x000000010b847516 realm::util::terminate(char const*, char const*, long, std::initializer_list<realm::util::Printable>&&) + 390
6   org.cocoapods.Realm           	0x000000010b6be1da void realm::util::terminate<unsigned long long, int>(char const*, char const*, long, unsigned long long, int) + 58
7   org.cocoapods.Realm           	0x000000010b909fac realm::sync::TableInfoCache::get_table_info(unsigned long) const + 2092
8   org.cocoapods.Realm           	0x000000010b90aafb realm::sync::create_object_with_primary_key(realm::sync::TableInfoCache const&, realm::Table&, realm::util::Optional<long long>) + 43
9   org.cocoapods.Realm           	0x000000010b547738 realm::Object realm::Object::create<objc_object* __strong, RLMAccessorContext>(RLMAccessorContext&, std::__1::shared_ptr<realm::Realm> const&, realm::ObjectSchema const&, objc_object* __strong, bool, bool, unsigned long, realm::BasicRow<realm::Table>*) + 504
10  org.cocoapods.Realm           	0x000000010b54742b RLMAddObjectToRealm + 409
11  andriiliakh.Instant-Translate 	0x000000010af89639 partial apply for closure #3 in HistoryManager.addRecordToHistory(_:json:newServerId:) + 25
12  org.cocoapods.RealmSwift      	0x000000010bdc9328 Realm.write(withoutNotifying:_:) + 56
13  andriiliakh.Instant-Translate 	0x000000010af85163 HistoryManager.addRecordToHistory(_:json:newServerId:) + 6691
14  andriiliakh.Instant-Translate 	0x000000010af8372c HistoryManager.addRecordToHistory(json:) + 172
15  andriiliakh.Instant-Translate 	0x000000010af3fb2e closure #3 in closure #1 in TranslateViewController.translate(autoswap:) + 654
16  andriiliakh.Instant-Translate 	0x000000010aecd7c9 thunk for @escaping @callee_guaranteed () -> () + 25
17  libdispatch.dylib             	0x00007fff6d625553 _dispatch_call_block_and_release + 12
18  libdispatch.dylib             	0x00007fff6d6264de _dispatch_client_callout + 8
19  libdispatch.dylib             	0x00007fff6d631bd3 _dispatch_main_queue_callback_4CF + 1105
20  com.apple.CoreFoundation      	0x00007fff36378290 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
21  com.apple.CoreFoundation      	0x00007fff363779da __CFRunLoopRun + 2370
22  com.apple.CoreFoundation      	0x00007fff36376e13 CFRunLoopRunSpecific + 499
23  com.apple.HIToolbox           	0x00007fff34f03b2d RunCurrentEventLoopInMode + 292
24  com.apple.HIToolbox           	0x00007fff34f0386d ReceiveNextEventCommon + 600
25  com.apple.HIToolbox           	0x00007fff34f035f7 _BlockUntilNextEventMatchingListInModeWithFilter + 64
26  com.apple.AppKit              	0x00007fff33599ac4 _DPSNextEvent + 990
27  com.apple.AppKit              	0x00007fff33598834 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352
28  com.apple.AppKit              	0x00007fff33592fd4 -[NSApplication run] + 658
29  com.apple.AppKit              	0x00007fff33584e7d NSApplicationMain + 777
30  andriiliakh.Instant-Translate 	0x000000010aeb4ef9 main + 9
31  libdyld.dylib                 	0x00007fff6d676405 start + 1

Steps to Reproduce

Unknown, happens on a small number of devices. I can't reproduce it on any of ~20 machines I tried.

Code Sample

let newRecord = HistoryRecord()
        
newRecord.timestamp = timestamp
newRecord.sourceLanguage = from
newRecord.targetLanguage = to
newRecord.json = json.rawString() ?? ""
newRecord.serverId = newServerId ?? serverId ?? 0
        
newRecord.text = text
        
do {
    try realm.write {
        realm.add(newRecord)
    }
} catch let error {
    NSLog("\(error)")
}

Model:

class HistoryRecord: Object {
    
    @objc dynamic var json = ""
    @objc dynamic var sourceLanguage = ""
    @objc dynamic var targetLanguage = ""
    @objc dynamic var text = ""
    @objc dynamic var timestamp: Int64 = 0
    @objc dynamic var needsUpdate = false
    @objc dynamic var serverId: Int = 0
    @objc dynamic var isDeleted: Bool = false
    
    override class func primaryKey() -> String? {
        return "timestamp"
    }
}

Version of Realm and Tooling

Realm framework version: 3.19.0

Realm Object Server version: -

Xcode version: 11.1 / 10

iOS/OSX version: 10.15 / 10.14

Dependency manager + version: CocoaPods 1.7.5

[liakhandrii]

I discovered this is related to #6268

[realm-probot]

Hey - looks like you forgot to add a T-* label - could you please add one (if you have access to add labels)?