Comment 43 for bug 1318584

For completeness sake, here's mine on Latitude D630 (Intel 965GM graphics), also inside qglxintegration.cpp but slightly different.

Program received signal SIGSEGV, Segmentation fault.
0x00007fffee0aa81c in QGLXContext::swapBuffers (this=0x81d790,
    surface=0x638450) at qglxintegration.cpp:392
(gdb) bt
#0 0x00007fffee0aa81c in QGLXContext::swapBuffers (this=0x81d790,
    surface=0x638450) at qglxintegration.cpp:392
#1 0x00007ffff641cd92 in QOpenGLContext::swapBuffers (this=0x6c6b60,
    surface=<optimized out>) at kernel/qopenglcontext.cpp:906
#2 0x00007ffff7990a8c in QSGGuiThreadRenderLoop::renderWindow (
    this=this@entry=0xb44110, window=0x7943c0)
    at scenegraph/qsgrenderloop.cpp:381
#3 0x00007ffff7990f1e in QSGGuiThreadRenderLoop::exposureChanged (
    this=0xb44110, window=0x7943c0) at scenegraph/qsgrenderloop.cpp:414
#4 0x00007ffff63e4769 in QWindow::event (this=this@entry=0x7943c0,
    ev=ev@entry=0x7fffffffd8a0) at kernel/qwindow.cpp:1956
#5 0x00007ffff79bad73 in QQuickWindow::event (this=0x7943c0, e=0x7fffffffd8a0)
    at items/qquickwindow.cpp:1339
#6 0x00007ffff6b3a6dc in QApplicationPrivate::notify_helper (
    this=this@entry=0x616560, receiver=receiver@entry=0x7943c0,
    e=e@entry=0x7fffffffd8a0) at kernel/qapplication.cpp:3504
#7 0x00007ffff6b3f456 in QApplication::notify (this=0x7fffffffddc0,
    receiver=0x7943c0, e=0x7fffffffd8a0) at kernel/qapplication.cpp:3287
#8 0x00007ffff5e999d5 in QCoreApplication::notifyInternal (this=
    0x7fffffffddc0, receiver=receiver@entry=0x7943c0,
    event=event@entry=0x7fffffffd8a0) at kernel/qcoreapplication.cpp:935
#9 0x00007ffff63ddee6 in sendSpontaneousEvent (event=0x7fffffffd8a0,
    receiver=0x7943c0)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:240
#10 QGuiApplicationPrivate::processExposeEvent (e=0x62f080)
    at kernel/qguiapplication.cpp:2528
#11 0x00007ffff63dea45 in QGuiApplicationPrivate::processWindowSystemEvent (
    e=e@entry=0x62f080) at kernel/qguiapplication.cpp:1566
#12 0x00007ffff63c54d8 in QWindowSystemInterface::sendWindowSystemEvents (
    flags=...) at kernel/qwindowsysteminterface.cpp:579
#13 0x00007fffee0ad000 in userEventSourceDispatch (source=<optimized out>)
    at eventdispatchers/qeventdispatcher_glib.cpp:78
#14 0x00007ffff4512de4 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007ffff4513028 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007ffff45130cc in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007ffff5ef06bc in QEventDispatcherGlib::processEvents (this=0x6ece20,
    flags=...) at kernel/qeventdispatcher_glib.cpp:426
#18 0x00007ffff5e978eb in QEventLoop::exec (this=this@entry=0x7fffffffdb60,
    flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#19 0x00007ffff5e9ef46 in QCoreApplication::exec ()
    at kernel/qcoreapplication.cpp:1188
#20 0x00007ffff63d60cc in QGuiApplication::exec ()
    at kernel/qguiapplication.cpp:1436
#21 0x00007ffff6b38e05 in QApplication::exec () at kernel/qapplication.cpp:2749
#22 0x0000000000404301 in main (argc=2, argv=<optimized out>) at main.cpp:548

I also added one more patch to the qt5-beta1 PPA's qtbase: https://qt.gitorious.org/qt/qtbase/commit/075c36e39beedb33ec4b239d57075f54acb21acf

Since Maarten experienced a trace that also concerned qtdeclarative (Qt Quick), it's worth mentioning there's an updated 5.3 branch snapshot build of qtdeclarative (made compatible with 5.3.0) soon finished building at: https://launchpad.net/~canonical-qt5-edgers/+archive/ubuntu/qt5-proper