Every so often choqok will crash, apparently while it is fetching
new Tweets from Twitter.  It is neither consistent nor repeatable;
restarting choqok immediately after the crash won't necessarily make it
crash again. I have captured a number of stack backtraces and they seem
to all be running through the same code path.

I'm running the latest git version in a hand-built RPM on Fedora 18. I
would be happy to run patches or try other diagnosis steps. As I've
captured a number of stack backtraces (with full symbols) I'll attach
one of them here.


Reproducible: Sometimes




Stack backtrace from the 'developers' tab of the automatic crash
reporting stuff:

Application: Choqok (choqok), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#5  QDate::isValid (this=0x10000000104) at tools/qdatetime.cpp:330
#6  0x0000003eed489910 in QDateTime::isValid (this=0xb889da8) at tools/qdatetime.cpp:2225
#7  0x00000031af64f379 in Choqok::UI::PostWidget::formatDateTime (this=0x975a8b0, time=...) at /usr/src/debug/choqok-1.3/libchoqok/ui/postwidget.cpp:454
#8  0x00000031af64ec47 in Choqok::UI::PostWidget::updateUi (this=0x975a8b0) at /usr/src/debug/choqok-1.3/libchoqok/ui/postwidget.cpp:246
#9  0x0000003eed58cd6f in QMetaObject::activate (sender=0x7cc36f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#10 0x0000003eed58c07c in QObject::event (this=0x7cc36f0, e=<optimized out>) at kernel/qobject.cpp:1156
#11 0x00000030dc3ca5cc in QApplicationPrivate::notify_helper (this=this@entry=0x82e870, receiver=receiver@entry=0x7cc36f0, e=e@entry=0x7fff7a36ae70) at kernel/qapplication.cpp:4562
#12 0x00000030dc3cea4a in QApplication::notify (this=0x7fff7a36b220, receiver=0x7cc36f0, e=0x7fff7a36ae70) at kernel/qapplication.cpp:4423
#13 0x00000034d2246f16 in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#14 0x0000003eed57793e in QCoreApplication::notifyInternal (this=0x7fff7a36b220, receiver=0x7cc36f0, event=0x7fff7a36ae70) at kernel/qcoreapplication.cpp:949
#15 0x0000003eed5a87f2 in sendEvent (event=0x7fff7a36ae70, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#16 QTimerInfoList::activateTimers (this=0x82fd60) at kernel/qeventdispatcher_unix.cpp:622
#17 0x0000003eed5a5914 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:186
#18 timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:180
#19 0x0000003eed5a5931 in idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:233
#20 0x0000003ee2847a55 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#21 0x0000003ee2847d88 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#22 0x0000003ee2847e44 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#23 0x0000003eed5a5f86 in QEventDispatcherGlib::processEvents (this=0x7b8120, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#24 0x00000030dc46a73e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#25 0x0000003eed5765ef in QEventLoop::processEvents (this=this@entry=0x7fff7a36b0f0, flags=...) at kernel/qeventloop.cpp:149
#26 0x0000003eed576878 in QEventLoop::exec (this=0x7fff7a36b0f0, flags=...) at kernel/qeventloop.cpp:204
#27 0x0000003eed57b708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#28 0x0000000000409946 in main (argc=1, argv=0x7fff7a36b368) at /usr/src/debug/choqok-1.3/choqok/main.cpp:63