Fabrics答案似乎崩溃了。我在Github上的iOS Realm issue上找到了相同的崩溃日志。
Crashed: io.answers.EventQueue :: NSOperation 0x17405fbc0 (QOS: BACKGROUND)
0 libswiftCore.dylib 0x101084da0 _stdlib_destroyTLS + 294720
...
11 XXXXX 0x1001f2c4c -[ANSRotateCrashMetadataOperation initWithCrashMetadataURL:currentMetadata:] (ANSRotateCrashMetadataOperation.m:28)
12 XXXXX 0x1001ffdf8 -[ANSAnswersController replacePreviousExecutionMetadataWithCurrentMetadata:inRootDirectory:] (ANSAnswersController.m:273)
13 XXXXX 0x1001fecb8 __56-[ANSAnswersController initWithBetaToken:rootDirectory:]_block_invoke (ANSAnswersController.m:103)
...