我正在使用AWS用户池。 我有：
func refreshDetails(_ user: AWSCognitoIdentityUser) -> AWSTask<AnyObject> {
return user.getDetails().continueWith(block: task -> Any? in
/*
here, task.result is AWSCognitoIdentityUserGetDetailsResponse
and task.result.userAttributes is correctly set
*/
return task
})
}
调用getDetails()并调用处理程序后，调试窗口输出会抱怨Invalid argument：
2018-01-24 16:15:09.843031 gc develop[49753:1784483] [] __nwlog_err_simulate_crash_libsystem libsystem simulate crash unavailable "libsystem_network.dylib: nw_host_stats_add_src :: received error for SRC_ADDED: [22] Invalid argument"
2018-01-24 16:15:09.843799 gc develop[49753:1784483] [] nw_host_stats_add_src received error for SRC_ADDED: [22] Invalid argument, dumping backtrace:
[i386] libnetcore-856.20.4
0 libsystem_network.dylib 0x07269161 __nw_create_backtrace_string + 123
1 libsystem_network.dylib 0x07280647 nw_get_host_stats + 1049
2 libnetwork.dylib 0x07548d55 nw_endpoint_resolver_start_next_child + 1560
3 libdispatch.dylib 0x070073ee _dispatch_call_block_and_release + 15
4 libdispatch.dylib 0x07032cc3 _dispatch_client_callout + 14
5 libdispatch.dylib 0x0700f449 _dispatch_queue_serial_drain + 1619
6 libdispatch.dylib 0x0700fc5d _dispatch_queue_invoke + 1109
7 libdispatch.dylib 0x07012639 _dispatch_root_queue_drain + 470
8 libdispatch.dylib 0x070123fb _dispatch_worker_thread3 + 143
9 libsystem_pthread.dylib 0x073b1fdc _pthread_wqthread + 1356
10 libsystem_pthread.dylib 0x073b1a6a start_wqthread + 34
2018-01-24 16:15:10.065788 gc develop[49753:1784482] [] __nwlog_err_simulate_crash_libsystem libsystem simulate crash unavailable "libsystem_network.dylib: nw_host_stats_add_src :: received error for SRC_ADDED: [22] Invalid argument"
2018-01-24 16:15:10.066392 gc develop[49753:1784482] [] nw_host_stats_add_src received error for SRC_ADDED: [22] Invalid argument, dumping backtrace:
[i386] libnetcore-856.20.4
0 libsystem_network.dylib 0x07269161 __nw_create_backtrace_string + 123
1 libsystem_network.dylib 0x07280647 nw_get_host_stats + 1049
2 libnetwork.dylib 0x07548d55 nw_endpoint_resolver_start_next_child + 1560
3 libdispatch.dylib 0x070073ee _dispatch_call_block_and_release + 15
4 libdispatch.dylib 0x07032cc3 _dispatch_client_callout + 14
5 libdispatch.dylib 0x0700f449 _dispatch_queue_serial_drain + 1619
6 libdispatch.dylib 0x0700fc5d _dispatch_queue_invoke + 1109
7 libdispatch.dylib 0x07012639 _dispatch_root_queue_drain + 470
8 libdispatch.dylib 0x070123fb _dispatch_worker_thread3 + 143
9 libsystem_pthread.dylib 0x073b1fdc _pthread_wqthread + 1356
10 libsystem_pthread.dylib 0x073b1a6a start_wqthread + 34
2018-01-24 16:15:10.825690 gc develop[49753:1784482] [] __nwlog_err_simulate_crash_libsystem libsystem simulate crash unavailable "libsystem_network.dylib: nw_host_stats_add_src :: received error for SRC_ADDED: [22] Invalid argument"
2018-01-24 16:15:10.826126 gc develop[49753:1784482] [] nw_host_stats_add_src received error for SRC_ADDED: [22] Invalid argument, dumping backtrace:
[i386] libnetcore-856.20.4
0 libsystem_network.dylib 0x07269161 __nw_create_backtrace_string + 123
1 libsystem_network.dylib 0x07280647 nw_get_host_stats + 1049
2 libnetwork.dylib 0x07548d55 nw_endpoint_resolver_start_next_child + 1560
3 libdispatch.dylib 0x070073ee _dispatch_call_block_and_release + 15
4 libdispatch.dylib 0x07032cc3 _dispatch_client_callout + 14
5 libdispatch.dylib 0x0700f449 _dispatch_queue_serial_drain + 1619
6 libdispatch.dylib 0x0700fc5d _dispatch_queue_invoke + 1109
7 libdispatch.dylib 0x07012639 _dispatch_root_queue_drain + 470
8 libdispatch.dylib 0x070123fb _dispatch_worker_thread3 + 143
9 libsystem_pthread.dylib 0x073b1fdc _pthread_wqthread + 1356
10 libsystem_pthread.dylib 0x073b1a6a start_wqthread + 34
(lldb)
这在模拟器上发生，但在硬件上运行时不会发生。