#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
  [Error: raise.c was not found in source tree]
#1  0x00007f2da3638f5d in __GI_abort () at abort.c:90
  [Error: abort.c was not found in source tree]
#2  0x00007f2d971bcfe7 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1690
  [Error: qlogging.cpp was not found in source tree]
#3  QMessageLogger::fatal (this=this@entry=0x7ffc10d9a9e0, msg=msg@entry=0x7f2d9755ac28 "Cannot mix incompatible Qt library (version 0x%x) with this library (version 0x%x)") at global/qlogging.cpp:796
  [Error: qlogging.cpp was not found in source tree]
#4  0x00007f2d973dc01e in QObjectPrivate::QObjectPrivate (this=<optimized out>, version=<optimized out>) at kernel/qobject.cpp:215
  [Error: qobject.cpp was not found in source tree]
#5  0x00007f2d70d8a05d in QSvgRendererPrivate::QSvgRendererPrivate (this=0x55a023938540) at qsvgrenderer.cpp:110
  [Error: qsvgrenderer.cpp was not found in source tree]
#6  QSvgRenderer::QSvgRenderer (this=0x7ffc10d9aa90, filename=..., parent=0x0) at qsvgrenderer.cpp:137
  [Error: qsvgrenderer.cpp was not found in source tree]
#7  0x00007f2d7034712c in QSvgIconEngine::addFile (this=this@entry=0x55a0234e6660, fileName=..., mode=mode@entry=QIcon::Normal, state=state@entry=QIcon::Off) at qsvgiconengine.cpp:239
  [Error: qsvgiconengine.cpp was not found in source tree]
#8  0x00007f2d70345329 in QSvgIconPlugin::create (this=<optimized out>, file=...) at main.cpp:68
  63: /** Counter of how often our deamon has been respawned. */
  64: unsigned cRespawn = 0;
  65: 
  66: /**
  67:  * Exit with a fatal error.
  68:  *
  69:  * This is used by the VBClFatalError macro and thus needs to be external.
  70:  */
  71: void vbclFatalError(char *pszMessage)
  72: {
  73:     char *pszCommand;
#9  0x00007f2d96b45d42 in iconEngineFromSuffix (fileName=..., suffix=...) at image/qicon.cpp:1036
  [Error: qicon.cpp was not found in source tree]
#10 0x00007f2d96b4ab7d in QIcon::addFile (this=0x7ffc10d9ac10, fileName=..., size=..., mode=QIcon::Normal, state=QIcon::Off) at image/qicon.cpp:1081
  [Error: qicon.cpp was not found in source tree]
#11 0x00007f2d96b4ad03 in QIcon::QIcon (this=<optimized out>, fileName=...) at image/qicon.cpp:716
  [Error: qicon.cpp was not found in source tree]
#12 0x00007f2d98dee4b6 in UISelectorWindow::prepareIcon (this=this@entry=0x55a0239c8690) at /build/virtualbox-SNwOtQ/virtualbox-5.2.4-dfsg/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.cpp:1371
  1366:     /* Prepare application icon.
  1367:      * On Win host it's built-in to the executable.
  1368:      * On Mac OS X the icon referenced in info.plist is used.
  1369:      * On X11 we will provide as much icons as we can. */
  1370: #if !(defined (VBOX_WS_WIN) || defined (VBOX_WS_MAC))
  1371:     QIcon icon(":/VirtualBox.svg");
  1372:     icon.addFile(":/VirtualBox_48px.png");
  1373:     icon.addFile(":/VirtualBox_64px.png");
  1374:     setWindowIcon(icon);
  1375: #endif /* !VBOX_WS_WIN && !VBOX_WS_MAC */
  1376: }
#13 0x00007f2d98dfad34 in UISelectorWindow::prepare (this=0x55a0239c8690) at /build/virtualbox-SNwOtQ/virtualbox-5.2.4-dfsg/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.cpp:1332
  1327:     /* Cache medium data early if necessary: */
  1328:     if (vboxGlobal().agressiveCaching())
  1329:         vboxGlobal().startMediumEnumeration();
  1330: 
  1331:     /* Prepare: */
  1332:     prepareIcon();
  1333:     prepareMenuBar();
  1334:     prepareStatusBar();
  1335:     prepareToolbar();
  1336:     prepareWidgets();
  1337:     prepareConnections();
#14 0x00007f2d98dfae12 in UISelectorWindow::create () at /build/virtualbox-SNwOtQ/virtualbox-5.2.4-dfsg/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.cpp:96
   91:         return;
   92: 
   93:     /* Create selector-window: */
   94:     new UISelectorWindow;
   95:     /* Prepare selector-window: */
   96:     m_spInstance->prepare();
   97:     /* Show selector-window: */
   98:     m_spInstance->show();
   99: }
  100: 
  101: /* static */
#15 0x00007f2d98d296af in VBoxGlobal::showUI (this=<optimized out>) at /build/virtualbox-SNwOtQ/virtualbox-5.2.4-dfsg/src/VBox/Frontends/VirtualBox/src/globals/VBoxGlobal.cpp:4297
  4292:             msgCenter().cannotStartSelector();
  4293:             return QApplication::quit();
  4294:         }
  4295: 
  4296:         /* Create/show selector-window: */
  4297:         UISelectorWindow::create();
  4298: 
  4299: #ifdef VBOX_BLEEDING_EDGE
  4300:         /* Show EXPERIMENTAL BUILD warning: */
  4301:         msgCenter().showExperimentalBuildWarning();
  4302: #else /* !VBOX_BLEEDING_EDGE */
#16 0x00007f2d990817a5 in VBoxGlobal::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /build/virtualbox-SNwOtQ/virtualbox-5.2.4-dfsg/out/obj/VirtualBox/qtmoc/VBoxGlobal.cpp:137
  132: #  include <xcb/xcb.h>
  133: # endif
  134: 
  135: #endif /* !VBOX_WITH_PRECOMPILED_HEADERS */
  136: 
  137: /* VirtualBox interface declarations: */
  138: #ifndef VBOX_WITH_XPCOM
  139: # include "VirtualBox.h"
  140: #else /* !VBOX_WITH_XPCOM */
  141: # include "VirtualBox_XPCOM.h"
  142: #endif /* VBOX_WITH_XPCOM */
#17 0x00007f2d973df7e2 in QObject::event (this=0x55a023424800, e=<optimized out>) at kernel/qobject.cpp:1246
  [Error: qobject.cpp was not found in source tree]
#18 0x00007f2d962ce59c in QApplicationPrivate::notify_helper (this=this@entry=0x55a0232ed810, receiver=receiver@entry=0x55a023424800, e=e@entry=0x55a02398d800) at kernel/qapplication.cpp:3722
  [Error: qapplication.cpp was not found in source tree]
#19 0x00007f2d962d5e64 in QApplication::notify (this=0x7ffc10d9b380, receiver=0x55a023424800, e=0x55a02398d800) at kernel/qapplication.cpp:3481
  [Error: qapplication.cpp was not found in source tree]
#20 0x00007f2d973b0178 in QCoreApplication::notifyInternal2 (receiver=0x55a023424800, event=event@entry=0x55a02398d800) at kernel/qcoreapplication.cpp:1018
  [Error: qcoreapplication.cpp was not found in source tree]
#21 0x00007f2d973b28ed in QCoreApplication::sendEvent (event=0x55a02398d800, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
  [Error: qcoreapplication.h was not found in source tree]
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55a0232ed980) at kernel/qcoreapplication.cpp:1678
  [Error: qcoreapplication.cpp was not found in source tree]
#23 0x00007f2d973b2e78 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
  [Error: qcoreapplication.cpp was not found in source tree]
#24 0x00007f2d974099e3 in postEventSourceDispatch (s=s@entry=0x55a023463f50) at kernel/qeventdispatcher_glib.cpp:276
  [Error: qeventdispatcher_glib.cpp was not found in source tree]
#25 0x00007f2d9347afb7 in g_main_dispatch (context=0x7f2d88005000) at ../../../../glib/gmain.c:3148
  [Error: gmain.c was not found in source tree]
#26 g_main_context_dispatch (context=context@entry=0x7f2d88005000) at ../../../../glib/gmain.c:3813
  [Error: gmain.c was not found in source tree]
#27 0x00007f2d9347b1f0 in g_main_context_iterate (context=context@entry=0x7f2d88005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3886
  [Error: gmain.c was not found in source tree]
#28 0x00007f2d9347b27c in g_main_context_iteration (context=0x7f2d88005000, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3947
  [Error: gmain.c was not found in source tree]
#29 0x00007f2d9740900f in QEventDispatcherGlib::processEvents (this=0x55a02345cd20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
  [Error: qeventdispatcher_glib.cpp was not found in source tree]
#30 0x00007f2d973ae1ca in QEventLoop::exec (this=this@entry=0x7ffc10d9b2b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
  [Error: qeventloop.cpp was not found in source tree]
#31 0x00007f2d973b7134 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
  [Error: qcoreapplication.cpp was not found in source tree]
#32 0x00007f2d96ab635c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1679
  [Error: qguiapplication.cpp was not found in source tree]
#33 0x00007f2d962ce4f5 in QApplication::exec () at kernel/qapplication.cpp:2910
  [Error: qapplication.cpp was not found in source tree]
#34 0x00007f2d98c98e93 in TrustedMain (argc=<optimized out>, argv=<optimized out>) at /build/virtualbox-SNwOtQ/virtualbox-5.2.4-dfsg/src/VBox/Frontends/VirtualBox/src/main.cpp:485
#35 0x00007f2da36211c1 in __libc_start_main (main=0x55a021f6c7b0 <main(int, char**, char**)>, argc=1, argv=0x7ffc10d9b4d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc10d9b4c8) at ../csu/libc-start.c:308
  [Error: libc-start.c was not found in source tree]
#36 0x000055a021f6c91a in _start ()