Application: kate (3.4.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2) (Compiled from sources)
Qt Version: 4.6.2
Operating System: Linux 2.6.31-gentoo-r10 i686
Distribution (Platform): Gentoo Packages

-- Information about the crash:
I using kate to edit files with the fish protocol.
After I selected two files to open them, a bug appears, that there was a line without description on the opened files overview.
Now kate crashes every time I start it.

 -- Backtrace:
Application: Kate (kate), signal: Segmentation fault
[KCrash Handler]
#5  QModelIndex::isValid (this=0x8b89d58, proxyIndex=...) at /usr/include/qt4/QtCore/qabstractitemmodel.h:77
#6  KateViewDocumentProxyModel::mapToSource (this=0x8b89d58, proxyIndex=...) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewdocumentproxymodel.cpp:346
#7  0xb777b0b8 in KateViewDocumentProxyModel::sort (this=0x8b89d58) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewdocumentproxymodel.cpp:620
#8  0xb777bb08 in KateViewDocumentProxyModel::opened (this=0x8b89d58, index=...) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewdocumentproxymodel.cpp:216
#9  0xb774a4e5 in KateMainWindow::slotWindowActivated (this=0x89abf80) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/katemainwindow.cpp:566
#10 0xb774f602 in KateMainWindow::qt_metacall (this=0x89abf80, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbf93c5b8)
    at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2_build/kate/app/katemainwindow.moc:181
#11 0xb6055b00 in QMetaObject::metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/qt4/libQtCore.so.4
#12 0xb6064ff2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/qt4/libQtCore.so.4
#13 0xb7752b68 in KateViewManager::viewChanged (this=0x8b46680) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2_build/kate/app/kateviewmanager.moc:164
#14 0xb7754fe2 in KateViewManager::activateView (this=0x8b46680, view=0x8d58c80) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewmanager.cpp:469
#15 0xb7755fcb in KateViewManager::createView (this=0x8b46680, doc=0x8bc7be8) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewmanager.cpp:308
#16 0xb7758d16 in KateViewSpace::restoreConfig (this=0x8c003b8, viewMan=0x8b46680, config=0x89a8118, groupname=...)
    at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewspace.cpp:252
#17 0xb7753a07 in KateViewManager::restoreSplitter (this=0x8b46680, configBase=0x89a8118, group=..., parent=0x8b46680, viewConfGrp=...)
    at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewmanager.cpp:804
#18 0xb77570e2 in KateViewManager::restoreViewConfiguration (this=0x8b46680, config=...) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateviewmanager.cpp:710
#19 0xb774d942 in KateMainWindow (this=0x89abf80, sconfig=0x89a8118, sgroup=..., __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>)
    at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/katemainwindow.cpp:208
#20 0xb77302ca in KateApp::newMainWindow (this=0xbf93d214, sconfig_=0x89a8118, sgroup_=...) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateapp.cpp:389
#21 0xb7764ff2 in KateSessionManager::activateSession (this=0x897bba0, session=..., closeLast=false, saveLast=false, loadNew=true)
    at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/katesession.cpp:341
#22 0xb776ab87 in KateSessionManager::chooseSession (this=0x897bba0) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/katesession.cpp:452
#23 0xb7731c1e in KateApp::startupKate (this=0xbf93d214) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateapp.cpp:182
#24 0xb773200b in KateApp::initKate (this=0xbf93d214) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateapp.cpp:135
#25 0xb773224a in KateApp (this=0xbf93d214, args=0x8843e00) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/kateapp.cpp:72
#26 0xb779869b in kdemain (argc=1, argv=0xbf93d8a4) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2/kate/app/katemain.cpp:373
#27 0x080487a2 in main (argc=100, argv=0xb5f3dc1e) at /var/tmp/portage/kde-base/kate-4.4.2/work/kate-4.4.2_build/kate/app/kate_dummy.cpp:3

Reported using DrKonqi