gnome-screensaver crashed with signal 5 in wl_display_connect()

[majid hussain]

this crash happend after I logged in to ubuntu. before hand I had done a dist-upgrade. running ubuntu utopic devel.

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: gnome-screensaver 3.6.1-0ubuntu13
ProcVersionSignature: Ubuntu 3.16.0-17.23-generic 3.16.3
Uname: Linux 3.13.0-36-generic i686
ApportVersion: 2.14.7-0ubuntu2
Architecture: i386
Date: Mon Sep 22 23:56:50 2014
ExecutablePath: /usr/bin/gnome-screensaver
GnomeSessionIdleInhibited: Unknown
GnomeSessionInhibitors: Failed to acquire
GsettingsGnomeSession:
 org.gnome.desktop.session session-name 'ubuntu'
 org.gnome.desktop.session idle-delay uint32 300
InstallationDate: Installed on 2014-06-28 (86 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
ProcCmdline: /usr/bin/gnome-screensaver --no-daemon
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANGUAGE=en_GB:en
 TERM=xterm
 LANG=en_GB.UTF-8
Signal: 5
SourcePackage: gnome-screensaver
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
 ?? () from /usr/lib/i386-linux-gnu/libwayland-client.so.0
 wl_display_connect () from /usr/lib/i386-linux-gnu/libwayland-client.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
 gdk_display_manager_open_display () from /usr/lib/i386-linux-gnu/libgdk-3.so.0
Title: gnome-screensaver crashed with signal 5 in wl_display_connect()
UpgradeStatus: Upgraded to utopic on 2014-09-22 (0 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 log_handler (format=0xb66a1d78 "error: XDG_RUNTIME_DIR not set in the environment.\n", args=0xbfd80bd4 "") at /build/buildd/gtk+3.0-3.12.2/./gdk/wayland/gdkdisplay-wayland.c:237
 wl_log (fmt=fmt@entry=0xb66a1d78 "error: XDG_RUNTIME_DIR not set in the environment.\n") at ../src/wayland-util.c:378
 connect_to_socket (name=0x0) at ../src/wayland-client.c:638
 wl_display_connect (name=0x0) at ../src/wayland-client.c:775
 _gdk_wayland_display_open (display_name=0x0) at /build/buildd/gtk+3.0-3.12.2/./gdk/wayland/gdkdisplay-wayland.c:249