evolution-calendar-factory-subprocess crashed with signal 7 in xmlPatterncompile()

Happens from time to time...

ProblemType: Crash
DistroRelease: Ubuntu 15.10
Package: evolution-data-server 3.18.2-0ubuntu1~wily1 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 4.4.6-3.1-surface 4.4.6-zen
Uname: Linux 4.4.6-3-surface x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CrashCounter: 1
CurrentDesktop: GNOME
Date: Wed May 18 22:47:53 2016
ExecutablePath: /usr/lib/evolution/evolution-calendar-factory-subprocess
InstallationDate: Installed on 2016-04-19 (29 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcCmdline: /usr/lib/evolution/evolution-calendar-factory-subprocess --factory ews --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx2039x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/Calendar/2039/3
ProcEnviron:
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
Signal: 7
SourcePackage: evolution-data-server
StacktraceTop:
 xmlPatterncompile () from /usr/lib/x86_64-linux-gnu/libxml2.so.2
 ?? () from /usr/lib/x86_64-linux-gnu/libxml2.so.2
 xmlXPathEvalExpr () from /usr/lib/x86_64-linux-gnu/libxml2.so.2
 xmlXPathEvalExpression () from /usr/lib/x86_64-linux-gnu/libxml2.so.2
 e_cal_backend_ews_populate_windows_zones () from /usr/lib/evolution-data-server/calendar-backends/libecalbackendews.so
Title: evolution-calendar-factory-subprocess crashed with signal 7 in xmlPatterncompile()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin plugdev root sambashare sudo