coredump when resetting unity

Binary package hint: unity

I have build Unity from sources using the instructions at http://askubuntu.com/questions/28470/how-do-i-build-unity-from-source/28472#28472

When I do : compiz --replace (or unity --reset) I get :

(<unknown>:2013): GLib-GIO-CRITICAL **: g_bus_own_name: assertion `g_dbus_is_name (name) && !g_dbus_is_unique_name (name)' failed

(<unknown>:2013): GLib-GIO-CRITICAL **: g_bus_watch_name: assertion `g_dbus_is_name (name)' failed

(<unknown>:2013): GLib-GIO-CRITICAL **: g_bus_own_name: assertion `g_dbus_is_name (name) && !g_dbus_is_unique_name (name)' failed

(<unknown>:2013): GLib-GIO-CRITICAL **: g_bus_watch_name: assertion `g_dbus_is_name (name)' failed

glibmm-ERROR **:
unhandled exception (type std::exception) in signal handler:
what: std::bad_alloc

aborting...
Aborted (core dumped)

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.6.8-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-7.38-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
Date: Fri Mar 25 12:42:30 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
ProcEnviron:
 LANGUAGE=fr:en
 LANG=fr_CA.UTF-8
 LC_MESSAGES=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)