[rekonq] Nice crash due to null pointer

[Jonathan Kolberg]

Hi guys,

I had a crash of rekonq due to activity stop and restart, since than I always 
get the following crash backtrace (0.7.92):

Thread 1 (Thread 0xb7815710 (LWP 9493)):
[KCrash Handler]
#7  page (this=0x0) at /home/jonathan/Develop/rekonq/src/webtab.h:71
#8  MainWindow::updateActions (this=0x955f6c8) at 
/home/jonathan/Develop/rekonq/src/mainwindow.cpp:715
#9  0x027c3bba in MainWindow::postLaunch (this=0x955f6c8) at 
/home/jonathan/Develop/rekonq/src/mainwindow.cpp:271
#10 0x027ca24c in MainWindow::qt_metacall (this=0x955f6c8, 
_c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0xbfbfa224) at 
/home/jonathan/Develop/.build/rekonq/src/mainwindow.moc:175
#11 0x00b6bb7d in QMetaObject::metacall(QObject*, QMetaObject::Call, int, 
void**) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#12 0x00b7aa6a in QMetaObject::activate(QObject*, QMetaObject const*, int, 
void**) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#13 0x00b82375 in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#14 0x00b8242c in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#15 0x00b7d994 in QObject::event(QEvent*) () from /usr/lib/i386-linux-
gnu/libQtCore.so.4
#16 0x0102cd54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () 
from /usr/lib/i386-linux-gnu/libQtGui.so.4
#17 0x01032103 in QApplication::notify(QObject*, QEvent*) () from 
/usr/lib/i386-linux-gnu/libQtGui.so.4
#18 0x002f7681 in KApplication::notify(QObject*, QEvent*) () from 
/usr/lib/libkdeui.so.5
#19 0x00b6519e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from 
/usr/lib/i386-linux-gnu/libQtCore.so.4
#20 0x00b95c10 in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#21 0x00b93122 in ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#22 0x030cb25f in g_main_context_dispatch () from /lib/i386-linux-
gnu/libglib-2.0.so.0
#23 0x030cb990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x030cbc2a in g_main_context_iteration () from /lib/i386-linux-
gnu/libglib-2.0.so.0
#25 0x00b93ada in 
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) 
() from /usr/lib/i386-linux-gnu/libQtCore.so.4
#26 0x010e4e3a in ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
#27 0x00b641dd in 
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from 
/usr/lib/i386-linux-gnu/libQtCore.so.4
#28 0x00b64421 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) 
() from /usr/lib/i386-linux-gnu/libQtCore.so.4
#29 0x00b6919d in QCoreApplication::exec() () from /usr/lib/i386-linux-
gnu/libQtCore.so.4
#30 0x0102a8f4 in QApplication::exec() () from /usr/lib/i386-linux-
gnu/libQtGui.so.4
#31 0x02859dee in kdemain (argc=1, argv=0x93e5a90) at 
/home/jonathan/Develop/rekonq/src/main.cpp:215
#32 0x0804f762 in _start ()

As far as I could figure out something in the page() function is going wrong 
(view a null pointer?). My problem is that I don’t know what should rekonq do, 
if it recognises the null pointer.

Regards Jonathan

PS.: it still happens in 0.8.0
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