这通常发生在从后台返回时。我很难重现这个问题。我最初的猜测是这是一个网络连接的竞争条件,但我可能错了。我在这里还缺少其他线索吗?
Thread 3 name: Dispatch queue: com.apple.networking.connection.0x5a6540
Thread 3 Crashed:
0 libsystem_kernel.dylib 0x38f422a8 __close_nocancel + 12
1 libdispatch.dylib 0x37f5083e _dispatch_source_cancel_callout + 98
2 libdispatch.dylib 0x37f4d122 _dispatch_source_invoke$VARIANT$mp + 230
3 libdispatch.dylib 0x37f4ae8e _dispatch_queue_drain$VARIANT$mp + 78
4 libdispatch.dylib 0x37f4adbc _dispatch_queue_invoke$VARIANT$mp + 36
5 libdispatch.dylib 0x37f4b91a _dispatch_root_queue_drain + 182
6 libdispatch.dylib 0x37f4babc _dispatch_worker_thread2 + 80
7 libsystem_c.dylib 0x34758a4e _pthread_wqthread + 358
8 libsystem_c.dylib 0x347588e0 start_wqthread + 4