#0  0xb7750424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb647f827 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = <optimized out>
        resultvar = <optimized out>
        pid = -1235238912
        selftid = 4030
#2  0xb6482c53 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x3, sa_sigaction = 0x3}, sa_mask = {__val = {2883578600, 3061258986, 3, 3078037504, 3069158104, 5, 2883578640, 3077960065, 3069158544, 3023872096, 1, 5, 0, 3061763759, 3, 3060163528, 2883578612, 3065619412, 3060938956, 3060855388, 2883578636, 3061259363, 2883578700, 3058004248, 2883578740, 0, 2, 3065618432, 2722900400, 2883578824, 2883578828, 3077985536}}, sa_flags = 0, sa_restorer = 0xb6482b10 <__GI_abort>}
        sigs = {__val = {32, 0 <repeats 31 times>}}
#3  0xb6772163 in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:979
No locals.
#4  QMessageLogger::fatal (this=0xabdfeb8c, msg=0xb69f9b3c "ASSERT: \"%s\" in file %s, line %d") at global/qlogging.cpp:384
        message = {static null = {<No data fields>}, d = 0xa24bd850}
        ap = 0xabdfeb68 ",\f\372\253\240\v\372\253?"
#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
        __PRETTY_FUNCTION__ = "void qt_assert(const char*, const char*, int)"
#6  0xabf86728 in QUbuntuBaseContext::QUbuntuBaseContext (this=0xa24c29b0, screen=0xaa498a60, share=0x0) at ../../../../src/platforms/base/context.cc:61
        attribs = {d = 0xa24c47c0}
#7  0xabf82fc0 in QUbuntuBaseIntegration::createPlatformOpenGLContext (this=0xaa47b4e8, context=0xa3421d68) at ../../../../src/platforms/base/integration.cc:93
No locals.
#8  0xb73c63d5 in QOpenGLContext::create (this=0xa3421d68) at kernel/qopenglcontext.cpp:483
No locals.
#9  0xb6cb5919 in QSGThreadedRenderLoop::handleExposure (this=this@entry=0xa976e3f0, w=w@entry=0xa3499090) at scenegraph/qsgthreadedrenderloop.cpp:917
        controller = <optimized out>
        __PRETTY_FUNCTION__ = "void QSGThreadedRenderLoop::handleExposure(QSGThreadedRenderLoop::Window*)"
#10 0xb6cb5e60 in QSGThreadedRenderLoop::exposureChanged (this=0xa976e3f0, window=0xaa406a40) at scenegraph/qsgthreadedrenderloop.cpp:881
No locals.
#11 0xb6cd328c in QQuickWindow::exposeEvent (this=0xaa406a40) at items/qquickwindow.cpp:213
No locals.
#12 0xb7395a84 in QWindow::event (this=0xaa406a40, ev=0xabdfeec4) at kernel/qwindow.cpp:1921
No locals.
#13 0xb6cde2bc in QQuickWindow::event (this=0xaa406a40, e=0xabdfeec4) at items/qquickwindow.cpp:1292
No locals.
#14 0xb6956d90 in QCoreApplicationPrivate::notify_helper (this=this@entry=0xaa400650, receiver=receiver@entry=0xaa406a40, event=event@entry=0xabdfeec4) at kernel/qcoreapplication.cpp:998
No locals.
#15 0xb6956df4 in QCoreApplication::notify (this=0xaa400628, receiver=0xaa406a40, event=0xabdfeec4) at kernel/qcoreapplication.cpp:943
        d = 0xaa400650
#16 0xb7389fed in QGuiApplication::notify (this=0xaa400628, object=0xaa406a40, event=0xabdfeec4) at kernel/qguiapplication.cpp:1364
No locals.
#17 0xb6956aea in QCoreApplication::notifyInternal (this=0xaa400628, receiver=0xaa406a40, event=0xabdfeec4) at kernel/qcoreapplication.cpp:881
        threadData = 0xaa400508
        loopLevelCounter = {threadData = 0xaa400508}
        result = false
        cbdata = {0xaa406a40, 0xabdfeec4, 0xabdfee53}
        d = <optimized out>
#18 0xb738efcb in sendSpontaneousEvent (event=0xabdfeec4, receiver=0xaa406a40) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:235
No locals.
#19 QGuiApplicationPrivate::processExposeEvent (e=e@entry=0xa25df188) at kernel/qguiapplication.cpp:2401
        p = <optimized out>
        exposeEvent = {<QEvent> = {_vptr.QEvent = 0xb7726410 <vtable for QExposeEvent+8>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0xb6b06dc0 <qt_meta_stringdata_QEvent>, data = 0xb6b06840 <qt_meta_data_QEvent>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0, t = 206, posted = 0, spont = 1, m_accept = 1, reserved = 5193}, rgn = {d = 0xb772e8f4 <QRegion::shared_empty>, static shared_empty = {ref = {_q_value = 7}, qt_rgn = 0xb772f2c0 <qrp>}}}
#20 0xb738fc70 in QGuiApplicationPrivate::processWindowSystemEvent (e=0xa25df188) at kernel/qguiapplication.cpp:1473
        __PRETTY_FUNCTION__ = "static void QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)"
#21 0xb73750f6 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:575
        event = 0xa25df188
        nevents = 3
#22 0xabf8d4e1 in userEventSourcePrepare(_GSource*, int*) () from /tmp/apport_sandbox_vKb_qD/usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqubuntumirserver.so
No symbol table info available.
#23 0x00000000 in ?? ()
No symbol table info available.