外部の画像を読み込み表示するプログラムで2行目の実行時にエラーが出ます。
※XcodeのバージョンはVersion 8.2.1になります。
※画像の表示は問題なくされているようです。

let url = URL(string: "***.jpg")!
let imageData = try? Data(contentsOf: url)
let img = UIImage(data:imageData!)
let imgView:UIImageView = UIImageView(image:img)
imgView.frame = CGRect(x:0, y:0, width:300, height:300)
self.view.addSubview(imgView);

エラーは以下のような内容ですが、意味がわからず、無視して良いのかもわかりません。
どなたか原因や意味わかりますでしょうか？

2017-01-24 16:50:51.273542 loadMovie2[2196:135371] [] nw_host_stats_add_src recv too small, received 24, expected 28
2017-01-24 16:50:51.276346 loadMovie2[2196:135371] [] ____nwlog_simulate_crash_inner_block_invoke dlopen CrashReporterSupport failed
2017-01-24 16:50:51.276600 loadMovie2[2196:135371] [] __nwlog_err_simulate_crash simulate crash failed "nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available"
2017-01-24 16:50:51.277360 loadMovie2[2196:135371] [] nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available, dumping backtrace:
        [x86_64] libnetcore-856.30.16
    0   libsystem_network.dylib             0x000000010fc4b666 __nw_create_backtrace_string + 123
    1   libnetwork.dylib                    0x000000010ff29006 nw_socket_add_input_handler + 3164
    2   libnetwork.dylib                    0x000000010ff06555 nw_endpoint_flow_attach_protocols + 3768
    3   libnetwork.dylib                    0x000000010ff05572 nw_endpoint_flow_setup_socket + 563
    4   libnetwork.dylib                    0x000000010ff04298 -[NWConcrete_nw_endpoint_flow startWithHandler:] + 2612
    5   libnetwork.dylib                    0x000000010ff1fae1 nw_endpoint_handler_path_change + 1261
    6   libnetwork.dylib                    0x000000010ff1f510 nw_endpoint_handler_start + 570
    7   libnetwork.dylib                    0x000000010ff371f9 nw_endpoint_resolver_start_next_child + 2240
    8   libdispatch.dylib                   0x000000010f9c8978 _dispatch_call_block_and_release + 12
    9   libdispatch.dylib                   0x000000010f9f20cd _dispatch_client_callout + 8
    10  libdispatch.dylib                   0x000000010f9cfe17 _dispatch_queue_serial_drain + 236
    11  libdispatch.dylib                   0x000000010f9d0b4b _dispatch_queue_invoke + 1073
    12  libdispatch.dylib                   0x000000010f9d3385 _dispatch_root_queue_drain + 720
    13  libdispatch.dylib                   0x000000010f9d3059 _dispatch_worker_thread3 + 123
    14  libsystem_pthread.dylib             0x000000010fd9b4de _pthread_wqthread + 1129
    15  libsystem_pthread.dylib             0x000000010fd99341 start_wqthread + 13