Comment 0 for bug 1562721

I'm using the gnome-flashback session, this happens whenever I click the indicator-datetime applet

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: policykit-1 0.105-14.1
Uname: Linux 4.5.0-040500-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
AssertionMessage: ERROR:polkitbackendsessionmonitor-systemd.c:345:polkit_backend_session_monitor_get_session_for_subject: assertion failed: (process != NULL)
Date: Mon Mar 28 02:56:55 2016
ExecutablePath: /usr/lib/policykit-1/polkitd
InstallationDate: Installed on 2010-12-09 (1936 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcCmdline: /usr/lib/policykit-1/polkitd --no-debug
ProcEnviron:
 LANG=en_US.utf8
 PATH=(custom, no user)
Signal: 6
SourcePackage: policykit-1
StacktraceTop:
 g_assertion_message (domain=domain@entry=0x0, file=file@entry=0x7f5465b01458 "polkitbackendsessionmonitor-systemd.c", line=line@entry=345, func=func@entry=0x7f5465b01520 "polkit_backend_session_monitor_get_session_for_subject", message=message@entry=0x16f6830 "assertion failed: (process != NULL)") at /build/glib2.0-OwfF9F/glib2.0-2.48.0/./glib/gtestutils.c:2429
 g_assertion_message_expr (domain=0x0, file=0x7f5465b01458 "polkitbackendsessionmonitor-systemd.c", line=345, func=0x7f5465b01520 "polkit_backend_session_monitor_get_session_for_subject", expr=<optimized out>) at /build/glib2.0-OwfF9F/glib2.0-2.48.0/./glib/gtestutils.c:2452
 polkit_backend_session_monitor_get_session_for_subject () at /usr/lib/x86_64-linux-gnu/libpolkit-backend-1.so.0
 () at /usr/lib/x86_64-linux-gnu/libpolkit-backend-1.so.0
 () at /usr/lib/x86_64-linux-gnu/libpolkit-backend-1.so.0
Title: polkitd assert failure: ERROR:polkitbackendsessionmonitor-systemd.c:345:polkit_backend_session_monitor_get_session_for_subject: assertion failed: (process != NULL)
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: pkcs11