#0  XGetSelectionOwner (dpy=0x3f8000003f4cd897, selection=0) at ../../src/GetSOwner.c:38
  [Error: ../../src/GetSOwner.c was not found in source tree]
#1  0x00007f043744d8de in unity::XdndStartStopNotifierImp::OnTimeout() () from /tmp/apport_sandbox__dP6Az/usr/lib/compiz/libunityshell.so
#2  0x00007f043564723a in unity::glib::Source::SourceCallback(void*) () from /tmp/apport_sandbox__dP6Az/usr/lib/libunity-core-6.0.so.9
#3  0x00007f04565cf5e3 in g_timeout_dispatch (source=0x3d10130, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/glib2.0-2.43.91/./glib/gmain.c:4545
  [Error: /build/buildd/glib2.0-2.43.91/./glib/gmain.c was not found in source tree]
#4  0x00007f04565ceb4d in g_main_dispatch (context=0x1ae2fc0) at /build/buildd/glib2.0-2.43.91/./glib/gmain.c:3122
  [Error: /build/buildd/glib2.0-2.43.91/./glib/gmain.c was not found in source tree]
#5  g_main_context_dispatch (context=context@entry=0x1ae2fc0) at /build/buildd/glib2.0-2.43.91/./glib/gmain.c:3737
  [Error: /build/buildd/glib2.0-2.43.91/./glib/gmain.c was not found in source tree]
#6  0x00007f04565cef20 in g_main_context_iterate (context=0x1ae2fc0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.43.91/./glib/gmain.c:3808
  [Error: /build/buildd/glib2.0-2.43.91/./glib/gmain.c was not found in source tree]
#7  0x00007f04565cf242 in g_main_loop_run (loop=0x1ae2ed0) at /build/buildd/glib2.0-2.43.91/./glib/gmain.c:4002
  [Error: /build/buildd/glib2.0-2.43.91/./glib/gmain.c was not found in source tree]
#8  0x00007f04583c38bb in compiz::private_screen::EventManager::startEventLoop (this=0x1ae0c98, dpy=0x1ae4660) at /build/buildd/compiz-0.9.12.1+15.04.20150303/src/screen.cpp:176
  [Error: /build/buildd/compiz-0.9.12.1+15.04.20150303/src/screen.cpp was not found in source tree]
#9  0x0000000000401911 in main (argc=1, argv=<optimized out>) at /build/buildd/compiz-0.9.12.1+15.04.20150303/src/main.cpp:260
  [Error: /build/buildd/compiz-0.9.12.1+15.04.20150303/src/main.cpp was not found in source tree]