Application: kmail (1.99.0)
KDE Platform Version: 4.4.61 (KDE 4.4.61 (KDE 4.5 >= 20100127)) (Compiled from sources)
Qt Version: 4.6.0
Operating System: Linux 2.6.33-rc5 x86_64

-- Information about the crash:
After tagging a message from the context menu, KMail crashed (when trying to load an icon?).

Crashed immediately the next time kmail opens that folder (inbox), too. I assume the message is tagged, and kmail crashes when trying to display it.

The crash can be reproduced every time.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[Current thread is 0 (LWP 8960)]

Thread 3 (Thread 0x7f926a88b710 (LWP 8966)):
#0  0x00007f927c5fd23c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f927514f9f6 in ?? () from /usr/lib64/qt4/libQtWebKit.so.4
#2  0x00007f927514fa19 in ?? () from /usr/lib64/qt4/libQtWebKit.so.4
#3  0x00007f927c5f8894 in start_thread () from /lib/libpthread.so.0
#4  0x00007f927bbc2f9d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f926514a710 (LWP 8970)):
#0  0x00007f927bbba273 in poll () from /lib/libc.so.6
#1  0x00007f9271c8ccec in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f9271c8d030 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f927c9a57e6 in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f927c97aca2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f927c97b074 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f927c8877f9 in QThread::exec () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f927c95b988 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f927c88a235 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f927c5f8894 in start_thread () from /lib/libpthread.so.0
#10 0x00007f927bbc2f9d in clone () from /lib/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f9282244760 (LWP 8960)):
[KCrash Handler]
#5  0x00007f9281c33226 in KIconLoader::loadIcon (this=0x14866d0, _name=@0x257d348, group=<value optimized out>, size=0, state=<value optimized out>, overlays=@0x7fffa0112620, path_store=0x0, 
    canReturnNull=false) at /home/cdruid/kde/src/kdelibs/kdeui/icons/kiconloader.cpp:967
#6  0x00007f9281c34a5f in SmallIcon (name=@0x257d348, force_size=0, state=0, overlays=@0x7fffa0112620) at /home/cdruid/kde/src/kdelibs/kdeui/icons/kiconloader.cpp:1588
#7  0x00007f9278935a02 in MessageList::Core::MessageItem::Private::fillTagList (this=<value optimized out>) at /home/cdruid/kde/src/kdepim/messagelist/core/messageitem.cpp:230
#8  0x00007f9278935fcd in MessageList::Core::MessageItem::Private::getTagList (this=<value optimized out>) at /home/cdruid/kde/src/kdepim/messagelist/core/messageitem.cpp:260
#9  0x00007f927893618a in MessageList::Core::MessageItem::Private::bestTag (this=0x0) at /home/cdruid/kde/src/kdepim/messagelist/core/messageitem.cpp:209
#10 0x00007f92789362c4 in MessageList::Core::MessageItem::font (this=0x0) at /home/cdruid/kde/src/kdepim/messagelist/core/messageitem.cpp:397
#11 0x00007f927895200b in MessageList::Core::ThemeDelegate::itemFont (ci=<value optimized out>, item=0x2a1ca60) at /home/cdruid/kde/src/kdepim/messagelist/core/themedelegate.cpp:1608
#12 0x00007f92789535a8 in MessageList::Core::ThemeDelegate::sizeHintForItemTypeAndColumn (this=<value optimized out>, type=<value optimized out>, column=<value optimized out>, 
    item=<value optimized out>) at /home/cdruid/kde/src/kdepim/messagelist/core/themedelegate.cpp:474
#13 0x00007f9278953742 in MessageList::Core::ThemeDelegate::sizeHint (this=0x1876970, index=<value optimized out>) at /home/cdruid/kde/src/kdepim/messagelist/core/themedelegate.cpp:1599
#14 0x00007f927daf50ae in QTreeView::indexRowSizeHint () from /usr/lib64/qt4/libQtGui.so.4
#15 0x00007f927daf544e in ?? () from /usr/lib64/qt4/libQtGui.so.4
#16 0x00007f927dafb388 in QTreeView::dataChanged () from /usr/lib64/qt4/libQtGui.so.4
#17 0x00007f927dac03eb in QAbstractItemView::qt_metacall () from /usr/lib64/qt4/libQtGui.so.4
#18 0x00007f927db00fa5 in QTreeView::qt_metacall () from /usr/lib64/qt4/libQtGui.so.4
#19 0x00007f9278965580 in MessageList::Core::View::qt_metacall (this=0x7fffa0112380, _c=QMetaObject::InvokeMetaMethod, _id=47, _a=0xb9590000) at /home/cdruid/kde/build/kdepim/messagelist/view.moc:83
#20 0x00007f927c98ef93 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#21 0x00007f927c9da387 in QAbstractItemModel::dataChanged () from /usr/lib64/qt4/libQtCore.so.4
#22 0x00007f92789400fd in MessageList::Core::ModelPrivate::viewItemJobStepInternalForJobPass1Update (this=0x186f1f0, job=<value optimized out>, tStart=<value optimized out>)
    at /home/cdruid/kde/src/kdepim/messagelist/core/model.cpp:3247
#23 0x00007f9278942475 in MessageList::Core::ModelPrivate::viewItemJobStepInternalForJob (this=0x186f1f0, job=0x0, tStart=@0x7fffa0113070)
    at /home/cdruid/kde/src/kdepim/messagelist/core/model.cpp:3422
#24 0x00007f9278942746 in MessageList::Core::ModelPrivate::viewItemJobStepInternal (this=0x186f1f0) at /home/cdruid/kde/src/kdepim/messagelist/core/model.cpp:3748
#25 0x00007f9278942f6a in MessageList::Core::ModelPrivate::viewItemJobStep (this=0x186f1f0) at /home/cdruid/kde/src/kdepim/messagelist/core/model.cpp:3963
#26 0x00007f9278944d9e in MessageList::Core::Model::qt_metacall (this=0x18935c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa0113390)
    at /home/cdruid/kde/build/kdepim/messagelist/model.moc:90
#27 0x00007f927c98ef93 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#28 0x00007f927c98bc33 in QObject::event () from /usr/lib64/qt4/libQtCore.so.4
#29 0x00007f927d6213dc in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007f927d629c1a in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#31 0x00007f9281c6aca6 in KApplication::notify (this=0x7fffa0113f00, receiver=0x186f228, event=0x7fffa0113ae0) at /home/cdruid/kde/src/kdelibs/kdeui/kernel/kapplication.cpp:302
#32 0x00007f927c97c34b in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#33 0x00007f927c9a8cc2 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#34 0x00007f927c9a5ac8 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#35 0x00007f9271c8954d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#36 0x00007f9271c8cf08 in ?? () from /usr/lib/libglib-2.0.so.0
#37 0x00007f9271c8d030 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#38 0x00007f927c9a5793 in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#39 0x00007f927d6bd69e in ?? () from /usr/lib64/qt4/libQtGui.so.4
#40 0x00007f927c97aca2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#41 0x00007f927c97b074 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#42 0x00007f927c97ed5b in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#43 0x0000000000403752 in main (argc=<value optimized out>, argv=<value optimized out>) at /home/cdruid/kde/src/kdepim/kmail/main.cpp:154

Reported using DrKonqi