Crash when choosing "yes" to some popups

[Alan Pope 🍺🐧🐱 🦄]

Every so often I get a popup on my krillin rc proposed telling me my google account credentials have expired, and asking me if I want to fix it. I usually click "no" because I'll do it later. Today i clicked "yes" while my phone was locked. Unity8 crashed.

Have your phone configured to sync calendars
Let your credentials become stale / expire
Wait....
Eventually when sync-monitor is checking for calendar entries it will popup a notification which asks if you want to fix the issue.
Select "no" and it goes away - don't do this.
Select "yes"

To reproduce with Google Calendar:
Have a Google Calendar account set up.
Head over to:
https://security.google.com/settings/security/permissions
Revoke access to Ubuntu.
Launch the calendar app and hit sync.
The notification prompting for key expiration will display.

Expected behaviour:-

It should ask you to unlock the phone and then take you to system settings

Actual behaviour:-

Unity8 dies.

Crash file attached.

[Alan Pope 🍺🐧🐱 🦄 (popey)]

managed to reproduce it again, this is the dialog which triggers it for me.

[Alan Pope 🍺🐧🐱 🦄 (popey)]

Turns out it doesn't matter if the device is locked. Happens when unlocked too.

Could be this crash dump:- https://errors.ubuntu.com/oops/30d1fe4c-12d1-11e6-8448-fa163ebeb28a

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.