test@localhost:~$ sudo snap changes
ID   Status  Spawn                 Ready                 Summary
1    Done    2017-10-13T17:37:43Z  2017-10-13T17:38:44Z  Initialize system state
2    Done    2017-10-13T17:38:40Z  2017-10-13T17:39:04Z  Initialize device
3    Done    2017-10-13T17:40:28Z  2017-10-13T17:40:31Z  Change configuration of "core" snap
4    Done    2017-10-13T17:40:33Z  2017-10-13T17:40:38Z  Change configuration of "core" snap
5    Done    2017-10-13T17:40:39Z  2017-10-13T17:40:41Z  Change configuration of "core" snap
6    Error   2017-10-13T17:44:15Z  2017-10-13T17:46:05Z  Install "core" snap from file "/var/lib/snapd/snaps/core_3193.snap"
7    Error   2017-10-13T18:01:07Z  2017-10-13T18:09:16Z  Refresh "core" snap from "candidate" channel
8    Error   2017-10-13T18:12:24Z  2017-10-13T18:31:51Z  Refresh "core" snap from "candidate" channel