My experience trying to use the new sgminer with hashbag pool:

[16:19:29] Started sgminer 5.3.8
[16:19:29] * using Jansson 2.7
[16:19:29] Started sgminer 5.3.8
[16:19:29] * using Jansson 2.7
[16:19:32] No login credentials supplied for pool.hashbag.cc

Then closes.