Error: Protocol not available, dumping backtrace [duplicate]
This question already has an answer here: Hide strange unwanted Xcode logs 12 answers 2016-09-17 15:16:04.386085 appDemo[2371:94976] [] __nwlog_err_simulate_crash simulate crash already simulated **"nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available"** 2016-09-17 15:16:04.386676 appDemo[2371:94976] [] nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available, dumping backtrace: [x86_64] libnetcore-856.1.8 0 libsystem_network.dylib 0x0000000112dc780e __nw_create_backtrace_string + 123 1 libnetwork.dylib