Social todo example asserts

nierob@42:~/dev/qtenginio-dev-debug$ gdb examples/quick/socialtodos/socialtodos
GNU gdb (GDB) 7.6 (Debian 7.6-5)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/nierob/dev/qtenginio-dev-debug/examples/quick/socialtodos/socialtodos...done.
(gdb) r
Starting program: /home/nierob/dev/qtenginio-dev-debug/examples/quick/socialtodos/socialtodos
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
bt
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffebf6e700 (LWP 19373)]
Qt: gdb: -nograb added to command-line options.
Use the -dograb option to enforce grabbing.
[New Thread 0x7fffeb353700 (LWP 19374)]
[New Thread 0x7fffe3fff700 (LWP 19375)]
[New Thread 0x7fffd7fff700 (LWP 19376)]
QTransform::translate with NaN called
QTransform::translate with NaN called
QTransform::translate with NaN called
ASSERT: "tl.y <= br.y" in file /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h, line 104

Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7fffd7fff700 (LWP 19376)]
0x00007ffff3c831e5 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 0x00007ffff3c831e5 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007ffff3c86398 in __GI_abort () at abort.c:90
#2 0x00007ffff4d2789f in qt_message_fatal (context=..., message=...) at /home/nierob/dev/qt5-dev/qtbase/src/corelib/global/qlogging.cpp:976
#3 0x00007ffff4d254e2 in QMessageLogger::fatal (this=0x7fffd7ffe600, msg=0x7ffff50779d0 "ASSERT: \"%s\" in file %s, line %d") at /home/nierob/dev/qt5-dev/qtbase/src/corelib/global/qlogging.cpp:384
#4 0x00007ffff4d20ae8 in qt_assert (assertion=0x7ffff7a48c3e "tl.y <= br.y", file=0x7ffff7a48bd8 "/home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h", line=104)
at /home/nierob/dev/qt5-dev/qtbase/src/corelib/global/qglobal.cpp:2046
#5 0x00007ffff7813b06 in QSGBatchRenderer::Rect::operator|= (this=0x7fffd005bc90, pt=...) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h:104
#6 0x00007ffff780876e in QSGBatchRenderer::Element::computeBounds (this=0x7fffd005bc70) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:549
#7 0x00007ffff7813f43 in QSGBatchRenderer::Element::ensureBoundsValid (this=0x7fffd005bc70) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h:170
#8 0x00007ffff780c667 in QSGBatchRenderer::Renderer::prepareAlphaBatches (this=0x7fffd00049b0) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:1438
#9 0x00007ffff78112e7 in QSGBatchRenderer::Renderer::render (this=0x7fffd00049b0) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:2190
#10 0x00007ffff7821105 in QSGRenderer::renderScene (this=0x7fffd00049b0, bindable=...) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgrenderer.cpp:274
#11 0x00007ffff7820f5d in QSGRenderer::renderScene (this=0x7fffd00049b0) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/coreapi/qsgrenderer.cpp:231
#12 0x00007ffff783894a in QSGContext::renderNextFrame (this=0x65f790, renderer=0x7fffd00049b0, fboId=0) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/qsgcontext.cpp:333
#13 0x00007ffff78901b6 in QQuickWindowPrivate::renderSceneGraph (this=0x65f500, size=...) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/items/qquickwindow.cpp:366
#14 0x00007ffff785e886 in QSGRenderThread::syncAndRender (this=0x6577e0) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/qsgthreadedrenderloop.cpp:603
#15 0x00007ffff785ecd3 in QSGRenderThread::run (this=0x6577e0) at /home/nierob/dev/qt5-dev/qtdeclarative/src/quick/scenegraph/qsgthreadedrenderloop.cpp:678
#16 0x00007ffff4d3a509 in QThreadPrivate::start (arg=0x6577e0) at /home/nierob/dev/qt5-dev/qtbase/src/corelib/thread/qthread_unix.cpp:345
#17 0x00007ffff4818e0e in start_thread (arg=0x7fffd7fff700) at pthread_create.c:311
#18 0x00007ffff3d369ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113