unity-control-center datetime segfaults when sorting while editing

[ADFH]

I work on systems that are in multiple timezones, so I like to have multiple clocks available to me at a glance so I can see what time it is where those systems are running.

Due to an unrelated mistake, I did a complete reinstall of Ubuntu last night, but maintained my user profile (separate drive).

1. I clicked on the clock in the system notification area, and selected Time & Date Settings.
2. I ticked some boxes (Show a clock, Weekday, 24 hour time, seconds, monthly calendar, include week numbers, time in other locations)
3. I clicked "Choose locations" and added Auckland, Adelaide, Perth, New York and Dallas
4. I clicked add (+) again but before actually entering a title, I clicked "Sort by time" (having clicked neither sort by time, nor sort by name previously) ... nothing seemed to happen so I clicked it again a couple of times

It's at this point my hard disk started thrashing heavily for several minutes and I lost control of my system until the IO subsided. I could not SSH in from another system (I could authenticate it seems, but not get a prompt) as if something was consuming all the available disk IO.

After a few moments, the system came good again.

It seems the key is to click the "+" but not complete the actual location adding operation, as clicking "Sort by time" otherwise works just fine.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: unity-control-center 15.04.0+15.10.20150923-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
Uname: Linux 4.2.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Jan 2 18:18:26 2016
InstallationDate: Installed on 2016-01-01 (0 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: unity-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thanks, it seems to segfault when doing that...