#0  0xac9ccf80 in ?? ()
#1  0xb691c6a0 in QQuickWindowPrivate::polishItems() () at items/qquickwindow.cpp:261
  [Error: items/qquickwindow.cpp was not found in source tree]
#2  0xb6906e50 in QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*) () at scenegraph/qsgthreadedrenderloop.cpp:1093
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#3  0xb6906fd8 in QSGThreadedRenderLoop::event(QEvent*) () at scenegraph/qsgthreadedrenderloop.cpp:1177
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#4  0xb668f226 in QCoreApplication::notify(QObject*, QEvent*) () at kernel/qcoreapplication.cpp:943
  [Error: kernel/qcoreapplication.cpp was not found in source tree]
#5  0xb668f00a in QCoreApplication::notifyInternal(QObject*, QEvent*) () at kernel/qcoreapplication.cpp:881
  [Error: kernel/qcoreapplication.cpp was not found in source tree]
#6  0xb66c36e8 in QTimerInfoList::activateTimers() () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:232
  [Error: ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h was not found in source tree]
#7  0xb66c3a3e in timerSourceDispatch(_GSource*, int (*)(void*), void*) () at kernel/qeventdispatcher_glib.cpp:185
  [Error: kernel/qeventdispatcher_glib.cpp was not found in source tree]
#8  0xb5e7439a in g_main_context_dispatch () from /tmp/apport_sandbox__qGPJ7/lib/arm-linux-gnueabihf/libglib-2.0.so.0
#9  0xb5e74522 in g_main_context_iterate.isra.24 () from /tmp/apport_sandbox__qGPJ7/lib/arm-linux-gnueabihf/libglib-2.0.so.0
#10 0xb5e74588 in g_main_context_iteration () from /tmp/apport_sandbox__qGPJ7/lib/arm-linux-gnueabihf/libglib-2.0.so.0
#11 0xb66c3c26 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at kernel/qeventdispatcher_glib.cpp:426
  [Error: kernel/qeventdispatcher_glib.cpp was not found in source tree]
#12 0xb668e304 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at kernel/qeventloop.cpp:212
  [Error: kernel/qeventloop.cpp was not found in source tree]
#13 0xb6692a72 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1134
  [Error: kernel/qcoreapplication.cpp was not found in source tree]
#14 0x0000c2b6 in startShell(int, char const**, void*) () at /build/buildd/unity8-7.84+14.04.20140324.4/src/main.cpp:137
  [Error: /build/buildd/unity8-7.84+14.04.20140324.4/src/main.cpp was not found in source tree]
#15 0xb64d2a2c in ?? () from /tmp/apport_sandbox__qGPJ7/usr/lib/arm-linux-gnueabihf/libstdc++.so.6
#16 0xb64d2a2c in ?? () from /tmp/apport_sandbox__qGPJ7/usr/lib/arm-linux-gnueabihf/libstdc++.so.6