#0  0xb7750424 in __kernel_vsyscall ()
#1  0xb647f827 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#2  0xb6482c53 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#3  0xb6772163 in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:979
  [Error: global/qlogging.cpp was not found in source tree]
#4  QMessageLogger::fatal (this=0xabdfeb8c, msg=0xb69f9b3c "ASSERT: \"%s\" in file %s, line %d") at global/qlogging.cpp:384
  [Error: global/qlogging.cpp was not found in source tree]
#5  0xb676ee5b in qt_assert (assertion=0xabfa0c2c "(eglContext_ = eglCreateContext( eglDisplay_, screen->eglConfig(), share ? share->eglContext() : EGL_NO_CONTEXT, attribs.constData())) != EGL_NO_CONTEXT", file=0xabfa0ba0 "../../../../src/platforms/base/context.cc", line=63) at global/qglobal.cpp:2096
  [Error: global/qglobal.cpp was not found in source tree]
#6  0xabf86728 in QUbuntuBaseContext::QUbuntuBaseContext (this=0xa24c29b0, screen=0xaa498a60, share=0x0) at ../../../../src/platforms/base/context.cc:61
  [Error: ../../../../src/platforms/base/context.cc was not found in source tree]
#7  0xabf82fc0 in QUbuntuBaseIntegration::createPlatformOpenGLContext (this=0xaa47b4e8, context=0xa3421d68) at ../../../../src/platforms/base/integration.cc:93
  [Error: ../../../../src/platforms/base/integration.cc was not found in source tree]
#8  0xb73c63d5 in QOpenGLContext::create (this=0xa3421d68) at kernel/qopenglcontext.cpp:483
  [Error: kernel/qopenglcontext.cpp was not found in source tree]
#9  0xb6cb5919 in QSGThreadedRenderLoop::handleExposure (this=this@entry=0xa976e3f0, w=w@entry=0xa3499090) at scenegraph/qsgthreadedrenderloop.cpp:917
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#10 0xb6cb5e60 in QSGThreadedRenderLoop::exposureChanged (this=0xa976e3f0, window=0xaa406a40) at scenegraph/qsgthreadedrenderloop.cpp:881
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#11 0xb6cd328c in QQuickWindow::exposeEvent (this=0xaa406a40) at items/qquickwindow.cpp:213
  [Error: items/qquickwindow.cpp was not found in source tree]
#12 0xb7395a84 in QWindow::event (this=0xaa406a40, ev=0xabdfeec4) at kernel/qwindow.cpp:1921
  [Error: kernel/qwindow.cpp was not found in source tree]
#13 0xb6cde2bc in QQuickWindow::event (this=0xaa406a40, e=0xabdfeec4) at items/qquickwindow.cpp:1292
  [Error: items/qquickwindow.cpp was not found in source tree]
#14 0xb6956d90 in QCoreApplicationPrivate::notify_helper (this=this@entry=0xaa400650, receiver=receiver@entry=0xaa406a40, event=event@entry=0xabdfeec4) at kernel/qcoreapplication.cpp:998
  [Error: kernel/qcoreapplication.cpp was not found in source tree]
#15 0xb6956df4 in QCoreApplication::notify (this=0xaa400628, receiver=0xaa406a40, event=0xabdfeec4) at kernel/qcoreapplication.cpp:943
  [Error: kernel/qcoreapplication.cpp was not found in source tree]
#16 0xb7389fed in QGuiApplication::notify (this=0xaa400628, object=0xaa406a40, event=0xabdfeec4) at kernel/qguiapplication.cpp:1364
  [Error: kernel/qguiapplication.cpp was not found in source tree]
#17 0xb6956aea in QCoreApplication::notifyInternal (this=0xaa400628, receiver=0xaa406a40, event=0xabdfeec4) at kernel/qcoreapplication.cpp:881
  [Error: kernel/qcoreapplication.cpp was not found in source tree]
#18 0xb738efcb in sendSpontaneousEvent (event=0xabdfeec4, receiver=0xaa406a40) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:235
  [Error: ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h was not found in source tree]
#19 QGuiApplicationPrivate::processExposeEvent (e=e@entry=0xa25df188) at kernel/qguiapplication.cpp:2401
  [Error: kernel/qguiapplication.cpp was not found in source tree]
#20 0xb738fc70 in QGuiApplicationPrivate::processWindowSystemEvent (e=0xa25df188) at kernel/qguiapplication.cpp:1473
  [Error: kernel/qguiapplication.cpp was not found in source tree]
#21 0xb73750f6 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:575
  [Error: kernel/qwindowsysteminterface.cpp was not found in source tree]
#22 0xabf8d4e1 in userEventSourcePrepare(_GSource*, int*) () from /tmp/apport_sandbox_vKb_qD/usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqubuntumirserver.so
#23 0x00000000 in ?? ()