Webkit/konqueror stops responding, crashes on youtube using flashplayer 11.2.x.x

Question

This might be a webkit case, might be a flashplayer case.
This bug is filled here and at bugs.kde.org.
Adobe flashplayer, version 11.2.202.356
Application: konqueror (4.12.4)
KDE Platform Version: 4.12.4
Qt Version: 4.8.6
Operating System: Linux 3.14.2-200.fc20.i686 i686
Distribution (Platform): Fedora RPMs
-- Information about the crash:
- What I was doing when the application crashed:
Browse to the youtube site and start scrolling immediately
using the scroll bars or start typing to search for a video.
Do this a bit faster then usual and keep that doing for about 10 seconds.
- Unusual behavior I noticed:
Scrolling and/or typing becomes slower and slower.
Konqueror stops responding and finally crashes or hangs
permanently. Behavior is reproducible each time.
When doing things very slow and easy, it works 'better', for
a longer period of time. Videos can be played and searched for but
after a while konqueror/webkit stops responding too.
- Custom settings of the application:
/usr/lib/mozilla/plugins/libflashplayer.so (Adobe, version 11.2.202.356)
which is a symbolic link to /usr/lib/flash-plugin/libflashplayer.so
Those are the ONLY custom settings I did.
Notes:
Using the QtWebkit from PyQt4-4.10.2-5.fc20.i686 produces the same result
(when used in a PyQt4 program).
Using konqueror in webkit mode.
System is installed from scratch just 2 days ago.
-Versions installed:
qtwebkit-2.3.3-7.fc20.i686
qt-4.8.6-2.fc20.i686
PyQt4-4.10.2-5.fc20.i686
Fedora 20 Linux 3.14.2-200.fc20.i686
This official Fedora KDE spin has been updated with the latest updates
as of 5 may 2014.
The crash can be reproduced every time.
-- Backtrace:
Application: Konqueror (konqueror), signal: Segmentation fault
Using host libthread_db library "/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0xb77bea80 (LWP 1460))]
Thread 4 (Thread 0xb4d22b40 (LWP 1462)):
#0 0xb77ed424 in __kernel_vsyscall ()
#1 0x42f81e22 in clock_gettime () from /lib/libc.so.6
#2 0x473619cd in qt_gettime() () from /lib/libQtCore.so.4
#3 0x47453c73 in QTimerInfoList::timerWait(timeval&) () from /lib/libQtCore.so.4
#4 0x4745208b in timerSourcePrepareHelper(GTimerSource*, int*) () from /lib/libQtCore.so.4
#5 0x4745213d in timerSourcePrepare(_GSource*, int*) () from /lib/libQtCore.so.4
#6 0x431c6dbf in g_main_context_prepare () from /lib/libglib-2.0.so.0
#7 0x431c7787 in g_main_context_iterate.isra.23 () from /lib/libglib-2.0.so.0
#8 0x431c79e9 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#9 0x4745228f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#10 0x4741eea0 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#11 0x4741f231 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4
#12 0x473000e5 in QThread::exec() () from /lib/libQtCore.so.4
#13 0x4730024c in QThread::run() () from /lib/libQtCore.so.4
#14 0x47302beb in QThreadPrivate::start(void*) () from /lib/libQtCore.so.4
#15 0x43049d8a in start_thread () from /lib/libpthread.so.0
#16 0x42f73a0e in clone () from /lib/libc.so.6
Thread 3 (Thread 0xb3eafb40 (LWP 1466)):
#0 0xb77ed424 in __kernel_vsyscall ()
#1 0x4304d7ac in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2 0x4cb2cc44 in WTF::ThreadCondition::wait(WTF::Mutex&) () from /lib/sse2/libQtWebKit.so.4
#3 0x4c7f38dc in JSC::BlockAllocator::blockFreeingThreadMain() () from /lib/sse2/libQtWebKit.so.4
#4 0x4cb0f139 in WTF::threadEntryPoint(void*) () from /lib/sse2/libQtWebKit.so.4
#5 0x4cb2c56a in WTF::wtfThreadEntryPoint(void*) () from /lib/sse2/libQtWebKit.so.4
#6 0x43049d8a in start_thread () from /lib/libpthread.so.0
#7 0x42f73a0e in clone () from /lib/libc.so.6
Thread 2 (Thread 0xb25ffb40 (LWP 1517)):
#0 0xb77ed424 in __kernel_vsyscall ()
#1 0x42f673eb in poll () from /lib/libc.so.6
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Thread 1 (Thread 0xb77bea80 (LWP 1460)):[KCrash Handler]#6 0x4b410610 in void QWebPagePrivate::mousePressEvent<QMouseEvent>(QMouseEvent*) () from /lib/sse2/libQtWebKit.so.4#7 0x4b41b474 in QWebPage::event(QEvent*) () from /lib/sse2/libQtWebKit.so.4#8 0x4b41e012 in QWebView::mousePressEvent(QMouseEvent*) () from /lib/sse2/libQtWebKit.so.4#9 0x4a0c77a4 in KWebView::mousePressEvent(QMouseEvent*) () from /lib/libkdewebkit.so.5#10 0x482b92dd in QWidget::event(QEvent*) () from /lib/libQtGui.so.4#11 0x4b41f758 in QWebView::event(QEvent*) () from /lib/sse2/libQtWebKit.so.4#12 0x4825ac04 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/libQtGui.so.4#13 0x482638c6 in QApplication::notify(QObject*, QEvent*) () from /lib/libQtGui.so.4#14 0x47eadec0 in KApplication::notify(QObject*, QEvent*) () from /lib/libkdeui.so.5#15 0x474205f6 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib/libQtCore.so.4#16 0x48261312 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /lib/libQtGui.so.4#17 0x482e6de8 in QETWidget::translateMouseEvent(_XEvent const*) () from /lib/libQtGui.so.4#18 0x482e54d3 in QApplication::x11ProcessEvent(_XEvent*) () from /lib/libQtGui.so.4#19 0x483111bb in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib/libQtGui.so.4#20 0x431c7556 in g_main_context_dispatch () from /lib/libglib-2.0.so.0#21 0x431c7920 in g_main_context_iterate.isra.23 () from /lib/libglib-2.0.so.0#22 0x431c79e9 in g_main_context_iteration () from /lib/libglib-2.0.so.0#23 0xaed60982 in gtk_main_iteration () from /lib/libgtk-x11-2.0.so.0#24 0xaf60a08c in ?? () from /usr/lib/flash-plugin/libflashplayer.so#25 0x431c8262 in g_timeout_dispatch () from /lib/libglib-2.0.so.0#26 0x431c7556 in g_main_context_dispatch () from /lib/libglib-2.0.so.0#27 0x431c7920 in g_main_context_iterate.isra.23 () from /lib/libglib-2.0.so.0#28 0x431c79e9 in g_main_context_iteration () from /lib/libglib-2.0.so.0#29 0x47452270 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4#30 0x4831137c in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtGui.so.4#31 0x4741eea0 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4#32 0x4741f231 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4#33 0x4742506b in QCoreApplication::exec() () from /lib/libQtCore.so.4#34 0x48258f15 in QApplication::exec() () from /lib/libQtGui.so.4#35 0x4651f83a in kdemain () from /lib/libkdeinit4_konqueror.so#36 0x0804872c in main ()Thread 1 (Thread 0xb77bea80 (LWP 1460)):#6 0x4b410610 in void QWebPagePrivate::mousePressEvent<QMouseEvent>(QMouseEvent*) () from /lib/sse2/libQtWebKit.so.4#7 0x4b41b474 in QWebPage::event(QEvent*) () from /lib/sse2/libQtWebKit.so.4#8 0x4b41e012 in QWebView::mousePressEvent(QMouseEvent*) () from /lib/sse2/libQtWebKit.so.4#9 0x4a0c77a4 in KWebView::mousePressEvent(QMouseEvent*) () from /lib/libkdewebkit.so.5#10 0x482b92dd in QWidget::event(QEvent*) () from /lib/libQtGui.so.4#11 0x4b41f758 in QWebView::event(QEvent*) () from /lib/sse2/libQtWebKit.so.4#12 0x4825ac04 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/libQtGui.so.4#13 0x482638c6 in QApplication::notify(QObject*, QEvent*) () from /lib/libQtGui.so.4#14 0x47eadec0 in KApplication::notify(QObject*, QEvent*) () from /lib/libkdeui.so.5#15 0x474205f6 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib/libQtCore.so.4#16 0x48261312 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /lib/libQtGui.so.4#17 0x482e6de8 in QETWidget::translateMouseEvent(_XEvent const*) () from /lib/libQtGui.so.4#18 0x482e54d3 in QApplication::x11ProcessEvent(_XEvent*) () from /lib/libQtGui.so.4#19 0x483111bb in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib/libQtGui.so.4#20 0x431c7556 in g_main_context_dispatch () from /lib/libglib-2.0.so.0#21 0x431c7920 in g_main_context_iterate.isra.23 () from /lib/libglib-2.0.so.0#22 0x431c79e9 in g_main_context_iteration () from /lib/libglib-2.0.so.0#23 0xaed60982 in gtk_main_iteration () from /lib/libgtk-x11-2.0.so.0#24 0xaf60a08c in ?? () from /usr/lib/flash-plugin/libflashplayer.so#25 0x431c8262 in g_timeout_dispatch () from /lib/libglib-2.0.so.0#26 0x431c7556 in g_main_context_dispatch () from /lib/libglib-2.0.so.0#27 0x431c7920 in g_main_context_iterate.isra.23 () from /lib/libglib-2.0.so.0#28 0x431c79e9 in g_main_context_iteration () from /lib/libglib-2.0.so.0#29 0x47452270 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4#30 0x4831137c in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtGui.so.4#31 0x4741eea0 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4#32 0x4741f231 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/libQtCore.so.4#33 0x4742506b in QCoreApplication::exec() () from /lib/libQtCore.so.4#34 0x48258f15 in QApplication::exec() () from /lib/libQtGui.so.4#35 0x4651f83a in kdemain () from /lib/libkdeinit4_konqueror.so#36 0x0804872c in main

Answer 1

Sometimes iMovie Projects become corrupted and can cause iMovie to crash. This is what worked for me after months of frustration without any solution.
Copy the iMovie Projects folder to the desktop. To avoid confusion rename this folder Desktop iMovie Projects. Do not delete these projects from the Desktop iMovie Projects folder.
Then delete all projects from the original iMovie Projects folder for iMovie - found Mac HD > Users > (Your home folder) > Movies > iMovie Projects.
Either create a simple test movie project in iMovie or...
or take, from Desktop iMovie Projects folder, one of the projects that you know was successfully exported in the past and copy from the Desktop iMovie Projectsfolder into the original iMovie Projects folder.
Try launching iMovie again.
In turn take, from Desktop iMovie Projects folder, another of the projects and copy from the Desktop iMovie Projects folder into the original iMovie Projects folder.
Close and restart iMovie. Try to export this project
In transferring one project at a time you can isolate the corrupted project(s)
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