test@localhost:~$ snap changes
ID Status Spawn Ready Summary
1 Done 2017-10-13T18:59:16Z 2017-10-13T18:59:40Z Initialize system state
2 Done 2017-10-13T18:59:36Z 2017-10-13T18:59:56Z Initialize device
3 Done 2017-10-13T19:10:40Z 2017-10-13T19:10:44Z Change configuration of "core" snap
4 Done 2017-10-13T19:10:46Z 2017-10-13T19:11:05Z Change configuration of "core" snap
5 Done 2017-10-13T19:11:05Z 2017-10-13T19:11:07Z Change configuration of "core" snap
6 Error 2017-10-13T19:14:24Z 2017-10-13T19:15:44Z Install "core" snap from file "/var/lib/snapd/snaps/core_3193.snap"
7 Error 2017-10-13T19:40:43Z 2017-10-13T19:50:17Z Refresh "core" snap from "candidate" channel
test@localhost:~$ snap change 7
Status Spawn Ready Summary
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:15Z Download snap "core" (3025) from channel "candidate"
Done 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Fetch and check assertions for snap "core" (3025)
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:17Z Mount snap "core" (3025)
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:14Z Stop snap "core" services
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:14Z Remove aliases for snap "core"
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:14Z Make current revision for snap "core" unavailable
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:14Z Copy snap "core" data
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:14Z Setup snap "core" (3025) security profiles
Undone 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Make snap "core" (3025) available to the system
Error 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Setup snap "core" (3025) security profiles (phase 2)
Hold 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Set automatic aliases for snap "core"
Hold 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Setup snap "core" aliases
Hold 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Run post-refresh hook of "core" snap if present
Hold 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Start snap "core" (3025) services
Hold 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Clean up "core" (3025) install
Hold 2017-10-13T19:40:43Z 2017-10-13T19:50:13Z Run configure hook of "core" snap if present
......................................................................
Make snap "core" (3025) available to the system
2017-10-13T19:45:11Z INFO Requested system restart.
......................................................................
Setup snap "core" (3025) security profiles (phase 2)
2017-10-13T19:45:12Z INFO Waiting for restart...
2017-10-13T19:45:36Z INFO Waiting for restart...
2017-10-13T19:50:13Z ERROR cannot finish core installation, there was a rollback across reboot