[phonon-backend-vlc] [Bug 434506] Crash when attempting to play a video in the preview of the information panel with Phonon-VLC

Manuel Geißer bugzilla_noreply at kde.org
Fri Mar 19 17:38:01 GMT 2021 

https://bugs.kde.org/show_bug.cgi?id=434506

--- Comment #18 from Manuel Geißer <geisserml at gmail.com> ---
manuel at lx2020:~$ export P_QIMAGE=1
manuel at lx2020:~$ gdb --args dolphin --new-window
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Reading symbols from dolphin...
Reading symbols from
/usr/lib/debug/.build-id/ce/2deed90dc691ba2e343a422e00e67b5680dcdf.debug...
(gdb) run
Starting program: /usr/bin/dolphin --new-window
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff046b700 (LWP 6669)]
[New Thread 0x7fffecc13700 (LWP 6670)]
[New Thread 0x7fffe7fff700 (LWP 6671)]
[New Thread 0x7fffe77fe700 (LWP 6672)]
[New Thread 0x7fffe6ffd700 (LWP 6673)]
[New Thread 0x7fffe67fc700 (LWP 6674)]
[Detaching after fork from child process 6684]
[Detaching after fork from child process 6690]
[Detaching after fork from child process 6692]
[Detaching after fork from child process 6693]
[Detaching after fork from child process 6694]
[Detaching after fork from child process 6695]
[New Thread 0x7fbfcbfff700 (LWP 6696)]
[Thread 0x7fbfcbfff700 (LWP 6696) exited]
[New Thread 0x7fbfcbfff700 (LWP 6697)]
[New Thread 0x7fffe4600700 (LWP 6698)]
[New Thread 0x7fbfa1366700 (LWP 6699)]
[New Thread 0x7fbfa0b65700 (LWP 6700)]
[New Thread 0x7fbfa0364700 (LWP 6701)]
[New Thread 0x7fbf9fb63700 (LWP 6702)]
[New Thread 0x7fbf9f362700 (LWP 6703)]
[New Thread 0x7fbf9eb61700 (LWP 6704)]
[New Thread 0x7fbf9e795700 (LWP 6705)]

Thread 1 "dolphin" received signal SIGSEGV, Segmentation fault.
0x00007ffff601f210 in qt_scale_image_32bit<Blend_RGB32_on_RGB32_NoAlpha> (
    destPixels=0x7fffe5694000
"\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377"...,
dbpl=5120, 
    srcPixels=0x7fbf9e2f4028 <error: Cannot access memory at address
0x7fbf9e2f4028>, sbpl=5120, srch=<optimized out>, targetRect=..., srcRect=..., 
    clip=..., blender=...) at painting/qblendfunctions_p.h:223
223     painting/qblendfunctions_p.h: Datei oder Verzeichnis nicht gefunden.
(gdb) bt
#0  0x00007ffff601f210 in
qt_scale_image_32bit<Blend_RGB32_on_RGB32_NoAlpha>(unsigned char*, int,
unsigned char const*, int, int, QRectF const&, QRectF const&, QRect const&,
Blend_RGB32_on_RGB32_NoAlpha)                                                   
    (destPixels=0x7fffe5694000
"\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377\f\f\f\377"...,
dbpl=5120, srcPixels=0x7fbf9e2f4028 <error: Cannot access memory at address
0x7fbf9e2f4028>, sbpl=5120, srch=<optimized out>, targetRect=..., srcRect=...,
clip=..., blender=...) at painting/qblendfunctions_p.h:223
#1  0x00007ffff6103a7d in QRasterPaintEngine::drawImage(QRectF const&, QImage
const&, QRectF const&, QFlags<Qt::ImageConversionFlag>) (this=
    0x555555db3820, r=..., img=..., sr=...) at
../../include/QtGui/5.15.2/QtGui/private/../../../../../src/gui/painting/qpaintengine_raster_p.h:446
#2  0x00007ffff611f861 in QPainter::drawImage(QRectF const&, QImage const&,
QRectF const&, QFlags<Qt::ImageConversionFlag>)
    (this=this at entry=0x7fffffffcb38, targetRect=..., image=..., sourceRect=...,
flags=flags at entry=...)
    at ../../include/QtCore/../../src/corelib/tools/qrect.h:644
#3  0x00007fffec06a74f in QPainter::drawImage(QRect const&, QImage const&)
(image=..., r=..., this=0x7fffffffcb38)
    at /usr/include/x86_64-linux-gnu/qt5/QtCore/qrect.h:269
#4  Phonon::VLC::SurfacePainter::handlePaint(QPaintEvent*)
(event=0x7fffffffcef0, this=0x555556176430) at ./src/video/videowidget.cpp:57
#5  Phonon::VLC::VideoWidget::paintEvent(QPaintEvent*) (this=<optimized out>,
event=0x7fffffffcef0) at ./src/video/videowidget.cpp:448
#6  0x00007ffff658cc06 in QWidget::event(QEvent*) () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007ffff6549dc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007ffff6552bb8 in QApplication::notify(QObject*, QEvent*) () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007ffff5a726da in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ffff658500a in QWidgetPrivate::sendPaintEvent(QRegion const&) () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007ffff6585832 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion
const&, QPoint const&, QFlags<QWidgetPrivate::DrawWidgetFlag>, QPainter*,
QWidgetRepaintManager*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007ffff655c427 in  () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007ffff655cf44 in  () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007ffff65866d5 in QWidgetPrivate::syncBackingStore() () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007ffff658d5fc in QWidget::event(QEvent*) () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007ffff66a58c8 in QMainWindow::event(QEvent*) () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007ffff71ebc73 in KMainWindow::event(QEvent*) () at
/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#18 0x00007ffff723713b in KXmlGuiWindow::event(QEvent*) () at
/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#19 0x00007ffff7ee19c8 in DolphinMainWindow::event(QEvent*) (this=<optimized
out>, event=<optimized out>) at ./src/dolphinmainwindow.cpp:2428
#20 0x00007ffff6549dc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007ffff6552bb8 in QApplication::notify(QObject*, QEvent*) () at
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007ffff5a726da in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007ffff5a74fe1 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007ffff5acd987 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007ffff378817d in g_main_context_dispatch () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007ffff3788400 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007ffff37884a3 in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007ffff5accfe2 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007ffff5a711eb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007ffff5a79394 in QCoreApplication::exec() () at
/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007ffff7ed9fa2 in kdemain(int, char**) (argc=<optimized out>,
argv=<optimized out>) at ./src/main.cpp:222
#32 0x00007ffff7cbb0b3 in __libc_start_main (main=
    0x555555555060 <main>, argc=2, argv=0x7fffffffddb8, init=<optimized out>,
fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdda8)
    at ../csu/libc-start.c:308
#33 0x000055555555509e in _start ()

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