#0  0x00007f238d6457b2 in getInstance (base=0x0) at /usr/include/compiz/core/pluginclasshandler.h:294
  289:      * otherwise spawn a new one implicitly (objects should
  290:      * never expect ::get () to fail, unless the plugin class
  291:      * fails to instantiate or the underlying base object
  292:      * does not take plugin classes of this type)
  293:      */
  294:     if (base->pluginClasses[mIndex.index])
  295: 	return static_cast<Tp *> (base->pluginClasses[mIndex.index]);
  296:     else
  297:     {
  298: 	/* mIndex.index will be implicitly set by
  299: 	 * the constructor */
#1  PluginClassHandler<unity::UnityWindow, CompWindow, 0>::get (base=0x0) at /usr/include/compiz/core/pluginclasshandler.h:345
  340: 
  341:     /* If pluginClassHandlerIndex == mIndex.pcIndex it means that our
  342:      * mIndex.index is fresh and can be used directly without needing
  343:      * to fetch it from ValueHolder */
  344:     if (mIndex.initiated && pluginClassHandlerIndex == mIndex.pcIndex)
  345: 	return getInstance (base);
  346: 
  347:     /* If allocating or getting the updated index failed at any point
  348:      * then just return NULL we don't know where our private data is stored */
  349:     if (mIndex.failed && pluginClassHandlerIndex == mIndex.pcIndex)
  350: 	return NULL;
#2  0x00007f238d65b465 in unity::UnityScreen::OnTerminateSpread (this=0x1fa1000) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/plugins/unityshell/src/unityshell.cpp:615
  [Error: unityshell.cpp was not found in source tree]
#3  0x00007f238d8e1cc2 in emit (impl=0x3228020) at /usr/include/sigc++-2.0/sigc++/signal.h:774
  [Error: signal.h was not found in source tree]
#4  emit (this=0x20224f8) at /usr/include/sigc++-2.0/sigc++/signal.h:2681
  [Error: signal.h was not found in source tree]
#5  unity::PluginAdapter::InitiateScale (this=this@entry=0x20222e0, match=..., state=state@entry=0) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/unity-shared/PluginAdapter.cpp:411
  [Error: PluginAdapter.cpp was not found in source tree]
#6  0x00007f238d8e23e5 in unity::PluginAdapter::ScaleWindowGroup (this=0x20222e0, windows=..., state=0, force=<optimized out>) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/unity-shared/PluginAdapter.cpp:1020
  [Error: PluginAdapter.cpp was not found in source tree]
#7  0x00007f238d78a661 in unity::launcher::WindowedLauncherIcon::Spread (this=<optimized out>, current_desktop=<optimized out>, state=0, force=<optimized out>) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/launcher/WindowedLauncherIcon.cpp:325
  [Error: WindowedLauncherIcon.cpp was not found in source tree]
#8  0x00007f238d787f55 in unity::launcher::WindowedLauncherIcon::ActivateLauncherIcon (this=0x81a1db0, arg=...) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/launcher/WindowedLauncherIcon.cpp:223
  [Error: WindowedLauncherIcon.cpp was not found in source tree]
#9  0x00007f238d753395 in unity::launcher::LauncherIcon::Activate (this=0x81a1db0, arg=...) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/launcher/LauncherIcon.cpp:242
  [Error: LauncherIcon.cpp was not found in source tree]
#10 0x00007f238d7525cd in unity::launcher::LauncherIcon::RecvMouseClick (this=0x81a1db0, button=1, monitor=0, key_flags=1048576) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/launcher/LauncherIcon.cpp:634
  [Error: LauncherIcon.cpp was not found in source tree]
#11 0x00007f238d73c564 in sigc::internal::signal_emit3<void, int, int, unsigned long, sigc::nil>::emit (impl=0xa07f900, _A_a1=@0x7ffd477d23cc: 1, _A_a2=@0x7ffd477d23e0: 0, _A_a3=@0x7ffd477d23b8: 1048576) at /usr/include/sigc++-2.0/sigc++/signal.h:1499
  [Error: signal.h was not found in source tree]
#12 0x00007f238d732b35 in emit (this=<optimized out>, _A_a3=@0x7ffd477d23b8: 1048576, _A_a2=@0x7ffd477d23e0: 0, _A_a1=@0x7ffd477d23cc: 1) at /usr/include/sigc++-2.0/sigc++/signal.h:3086
  [Error: signal.h was not found in source tree]
#13 unity::launcher::Launcher::MouseUpLogic (this=this@entry=0x3216b10, x=x@entry=46, y=y@entry=129, button_flags=button_flags@entry=2101248, key_flags=key_flags@entry=1048576) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/launcher/Launcher.cpp:2644
  [Error: Launcher.cpp was not found in source tree]
#14 0x00007f238d733484 in unity::launcher::Launcher::RecvMouseUp (this=0x3216b10, x=46, y=129, button_flags=2101248, key_flags=1048576) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/launcher/Launcher.cpp:2332
  [Error: Launcher.cpp was not found in source tree]
#15 0x00007f238c3023b9 in emit (_A_a4=@0x7ffd477d2488: 1048576, _A_a3=@0x7ffd477d2490: 2101248, _A_a2=@0x7ffd477d2498: 129, _A_a1=@0x7ffd477d249c: 46, impl=0x32435b0) at /usr/include/sigc++-2.0/sigc++/signal.h:1755
  [Error: signal.h was not found in source tree]
#16 emit (this=0x7ffd477d2818, _A_a4=@0x7ffd477d2488: 1048576, _A_a3=@0x7ffd477d2490: 2101248, _A_a2=@0x7ffd477d2498: 129, _A_a1=@0x7ffd477d249c: 46) at /usr/include/sigc++-2.0/sigc++/signal.h:3225
  [Error: signal.h was not found in source tree]
#17 nux::InputArea::EmitMouseUpSignal (this=this@entry=0x3216b58, x=x@entry=46, y=y@entry=129, mouse_button_state=2101248, special_keys_state=special_keys_state@entry=1048576) at InputArea.cpp:300
  [Error: InputArea.cpp was not found in source tree]
#18 0x00007f238c335cb7 in nux::WindowCompositor::UpdateMouseOwner (this=this@entry=0x21b7130, event=..., area_under_mouse_changed=area_under_mouse_changed@entry=false) at WindowCompositor.cpp:646
  [Error: WindowCompositor.cpp was not found in source tree]
#19 0x00007f238c336857 in nux::WindowCompositor::MouseEventCycle (this=0x21b7130, event=...) at WindowCompositor.cpp:723
  [Error: WindowCompositor.cpp was not found in source tree]
#20 0x00007f238c33760b in nux::WindowCompositor::ProcessEvent (this=0x21b7130, event=...) at WindowCompositor.cpp:1171
  [Error: WindowCompositor.cpp was not found in source tree]
#21 0x00007f238c33bc6d in nux::WindowThread::ProcessForeignEvent (this=0x20b4cf0, xevent=xevent@entry=0x7ffd477d3020) at WindowThread.cpp:1383
  [Error: WindowThread.cpp was not found in source tree]
#22 0x00007f238d65bfb4 in unity::UnityScreen::handleEvent (this=0x1fa1000, event=0x7ffd477d3020) at /build/unity-S0BzK0/unity-7.4.0+16.04.20160322/plugins/unityshell/src/unityshell.cpp:2070
  [Error: unityshell.cpp was not found in source tree]
#23 0x00007f23ae3f8f82 in CompScreen::handleEvent (this=0x182f510, event=<optimized out>) at /build/compiz-RjP9mQ/compiz-0.9.12.2+16.04.20160318/src/event.cpp:1256
  1251: }
  1252: 
  1253: void
  1254: CompScreen::handleEvent (XEvent *event)
  1255: {
  1256:     WRAPABLE_HND_FUNCTN (handleEvent, event)
  1257:     _handleEvent (event);
  1258: }
  1259: 
  1260: void
  1261: CompScreenImpl::alwaysHandleEvent (XEvent *event)
#24 0x00007f23ae3f8fc4 in CompScreenImpl::alwaysHandleEvent (this=0x182f510, event=0x7ffd477d3020) at /build/compiz-RjP9mQ/compiz-0.9.12.2+16.04.20160318/src/event.cpp:1272
  1267:     if (event->type == ButtonPress || event->type == KeyPress)
  1268: 	privateScreen.eventManager.resetPossibleTap();
  1269: 
  1270:     eventHandled = true;  // if we return inside WRAPABLE_HND_FUNCTN
  1271: 
  1272:     handleEvent (event);
  1273: 
  1274:     bool keyEvent = (event->type == KeyPress || event->type == KeyRelease);
  1275: 
  1276:     /* Always either replay the keyboard or consume the key
  1277:      * event on keypresses */
#25 0x00007f23ae3cd78d in PrivateScreen::processEvents (this=0x1833878) at /build/compiz-RjP9mQ/compiz-0.9.12.2+16.04.20160318/src/screen.cpp:890
  885: 
  886:     if (priv->damageMask)
  887:     {
  888: 	/* Damage that accumulates here does not require a repaint reschedule
  889: 	 * as it will end up on this frame */
  890: 	priv->damageRequiresRepaintReschedule = false;
  891: 
  892: 	if (priv->pHnd)
  893: 	    priv->pHnd->prepareDrawing ();
  894: 
  895: 	int timeDiff = compiz::core::timer::timeval_diff (&tv, &priv->lastRedraw);
#26 0x00007f23ae405727 in CompEventSource::callback (this=<optimized out>) at /build/compiz-RjP9mQ/compiz-0.9.12.2+16.04.20160318/src/eventsource.cpp:64
  59: }
  60: 
  61: bool
  62: CompEventSource::callback ()
  63: {
  64:     screen->processEvents ();
  65:     return true;
  66: }
  67: 
  68: bool
  69: CompEventSource::prepare (int &timeout)
#27 0x00007f23ac65337f in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /tmp/apport_sandbox_yft8UY/usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#28 0x00007f23ac338fea in g_main_context_dispatch () from /tmp/apport_sandbox_yft8UY/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f23ac339390 in g_main_context_iterate.isra () from /tmp/apport_sandbox_yft8UY/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f23ac3396b2 in g_main_loop_run () from /tmp/apport_sandbox_yft8UY/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f23ae3c34ff in compiz::private_screen::EventManager::startEventLoop (this=0x1833928, dpy=0x1837970) at /build/compiz-RjP9mQ/compiz-0.9.12.2+16.04.20160318/src/screen.cpp:188
  183: 	    }
  184: 	    else if (randrExtension &&
  185: 		     event->type == randrEvent + RRScreenChangeNotify)
  186: 	    {
  187: 		XRRScreenChangeNotifyEvent *rre;
  188: 
  189: 		rre = (XRRScreenChangeNotifyEvent *) event;
  190: 
  191: 		if (screen->root () == rre->root)
  192: 		    detectRefreshRate ();
  193: 	    }
#32 0x00000000004017c1 in main (argc=1, argv=<optimized out>) at /build/compiz-RjP9mQ/compiz-0.9.12.2+16.04.20160318/src/main.cpp:261