Using the following Qt5.1.1 packages from https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-beta-proper:
libqt5core5:armhf 5.1.1+dfsg-2ubuntu1~saucy1~test5
libqt5opengl5:armhf 5.1.1+dfsg-2ubuntu1~saucy1~test5
Steps to reproduce:
1 - Open the camera-app
2 - Take a picture
Can't reproduce all the time, but it's quite easy to reproduce the issue.
Backtrace:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x49aa8460 (LWP 5262)]
0x00000000 in ?? ()
(gdb) bt full
#0 0x00000000 in ?? ()
No symbol table info available.
#1 0x403dceaa in QSGOpaqueTextureMaterialShader::updateState (this=0x279c30, state=..., newEffect=0x386fd4, oldEffect=0x0) at scenegraph/util/qsgtexturematerial.cpp:107
tx = 0x386fd4
oldTx = 0x0
npotSupported = true
size = {wd = 1235909436, ht = 1077792673}
isNpot = <optimized out>
#2 0x403d6700 in QSGDefaultRenderer::renderNodes (this=this@entry=0x322f18, nodes=<optimized out>, count=count@entry=12) at scenegraph/coreapi/qsgdefaultrenderer.cpp:528
geomNode = 0x386f30
changeMatrix = <optimized out>
updates = <optimized out>
changeClip = <optimized out>
changeProgram = <optimized out>
changeRenderOrder = <optimized out>
changeOpacity = <optimized out>
material = 0x386fd4
program = 0x279c30
i = 0
scale = <optimized out>
currentRenderOrder = <optimized out>
currentClipType = {i = 0}
projection = {m = {{0.00260416674, 0, 0, 0}, {0, -0.00163666124, 0, 0}, {0, 0, 1, 0}, {-1, 1, 0, 1}}, flagBits = 3}
#3 0x403d6a32 in QSGDefaultRenderer::render (this=0x322f18) at scenegraph/coreapi/qsgdefaultrenderer.cpp:281
opaqueEnd = 3
transparentEnd = 12
i = 0
r = <optimized out>
sortNodes = <optimized out>
opaqueStart = <optimized out>
transparentStart = 0
#4 0x403da1de in QSGRenderer::renderScene (this=this@entry=0x322f18, bindable=...) at scenegraph/coreapi/qsgrenderer.cpp:274
profileFrames = false
bindTime = 0
renderTime = 0
#5 0x403da2e8 in QSGRenderer::renderScene (this=this@entry=0x322f18) at scenegraph/coreapi/qsgrenderer.cpp:231
b = warning: RTTI symbol not found for class 'QSGRenderer::renderScene()::B'
{<QSGBindable> = {_vptr.QSGBindable = 0x40503ad8 <vtable for QSGRenderer::renderScene()::B+8>}, <No data fields>}
#6 0x403e0e56 in QSGContext::renderNextFrame (this=<optimized out>, renderer=0x322f18, fboId=<optimized out>) at scenegraph/qsgcontext.cpp:313
No locals.
#7 0x4040452e in QQuickWindowPrivate::renderSceneGraph (this=this@entry=0x40c50, size=...) at items/qquickwindow.cpp:336
_qml_memory_scope = {pushed = false}
fboId = <optimized out>
devicePixelRatio = <optimized out>
#8 0x403f1ace in QSGRenderThread::syncAndRender (this=this@entry=0x40330) at scenegraph/qsgthreadedrenderloop.cpp:595
i = 0
profileFrames = <optimized out>
syncRequested = <optimized out>
__PRETTY_FUNCTION__ = "void QSGRenderThread::syncAndRender()"
waitTimer = {t1 = 725, t2 = 845641251}
repaintRequested = <optimized out>
#9 0x403f2996 in QSGRenderThread::run (this=0x40330) at scenegraph/qsgthreadedrenderloop.cpp:666
No locals.
#10 0x4009a86c in QThreadPrivate::start (arg=0x40330) at thread/qthread_unix.cpp:345
__clframe = {__cancel_routine = 0x40099ff1 <QThreadPrivate::finish(void*)>, __cancel_arg = 0x40330, __do_it = 1, __cancel_type = <optimized out>}
thr = 0x40330
data = <optimized out>
objectName = {static null = {<No data fields>}, d = 0x4020ce94 <QArrayData::shared_null>}
#11 0x40ad1e64 in start_thread (arg=0x49aa8460) at pthread_create.c:313
pd = 0x49aa8460
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {1235912312, 1235911776, 1, 1235910120, -1090523272, -1090523272, 1235911776, 1112166720, 1235910120, 1085087299, 0 <repeats 16 times>,
536870931, 0 <repeats 37 times>}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
not_first_call = <optimized out>
pagesize_m1 = <optimized out>
sp = <optimized out>
freesize = <optimized out>
__PRETTY_FUNCTION__ = "start_thread"
#12 0x40a79758 in ?? () at ../ports/sysdeps/unix/sysv/linux/arm/nptl/../clone.S:96 from /lib/arm-linux-gnueabihf/libc.so.6
No locals.
#13 0x40a79758 in ?? () at ../ports/sysdeps/unix/sysv/linux/arm/nptl/../clone.S:96 from /lib/arm-linux-gnueabihf/libc.so.6
The crash is caused by the preview sliding down after the capture.
Actually it's after the animation, the image is reset by setting it's source to "", that triggers the crash.
This does not happen when an image is loaded from disk as preview.