使用NSManagedObjectContext保存到coredata时，iOS 11崩溃

Question

ios11应用程序在保存到核心数据时崩溃，但有以下异常，它在iOS10及以下版本中运行良好。

  

断言失败：（moreParameters-＆gt; mostRecentEntry == CFArrayGetValueAtIndex（stack，stackCount - 1）），函数NSKeyValuePopPendingNotificationPerThread，file /BuildRoot/Library/Caches/com.apple.xbs/Sources/Foundation_Sim/Foundation-1444.12/EO .subproj / NSKeyValueObserving.m，第933行。

[context performBlockAndWait:^{
                        NSError *saveErr = nil;
                        if (![context save:&saveErr]) {
                            NSLog(@"Can't Save! %@ %@", saveErr, [saveErr localizedDescription]);
                        }  
}];

崩溃发生在if（！[context save：＆amp; saveErr]）

下面是NSManagedObject：

<ContentLanguage: 0x60000009f8b0> (entity: ContentLanguage; id: 0xd0000000000c0006 x-coredata://B53C7782-1231-4DB9-8579-77BFC31ADDA9/ContentLanguage/p3 ; data: {
displayName = "T\U00fcrk\U00e7e";
langId = tr;
relationship = "<relationship fault: 0x60400023c9e0 'relationship'>";
settings = nil;
user = "0xd000000000040002 x-coredata://B53C7782-1231-4DB9-8579-77BFC31ADDA9/User/p1";
})

ContentLanguage Entity