Application: kdevelop (4.2.3)
KDE Platform Version: 4.6.5 (4.6.5) (Compiled from sources)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-13-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:

Probably it is katepart problem, but I haven't tried.
I edited python code, paste a class method and change it a little, 
next collapsed it and I saw that one empty line between this and next method is collapsed too.
SO I want to editor refresh view so I tried to reopen file, then editor crashed.

The crash does not seem to be reproducible.

-- Backtrace:
Application: KDevelop (kdevelop), signal: Aborted
[Current thread is 1 (Thread 0x7fa54e589780 (LWP 2618))]

Thread 12 (Thread 0x7fa535ffe700 (LWP 2619)):
#0  0x00007fa54ab473c4 in __pthread_mutex_lock (mutex=0xd0df38) at pthread_mutex_lock.c:61
#1  0x00007fa54614a869 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa54614c13a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa54614c639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa54cb98446 in QEventDispatcherGlib::processEvents (this=0xbf16d0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fa54cb6c882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fa54cb6cabc in QEventLoop::exec (this=0x7fa535ffddd0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fa54ca83924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007fa54cb4ec2f in QInotifyFileSystemWatcherEngine::run (this=0xd0cc70) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fa54ca86175 in QThreadPrivate::start (arg=0xd0cc70) at thread/qthread_unix.cpp:320
#10 0x00007fa54ab44d8c in start_thread (arg=0x7fa535ffe700) at pthread_create.c:304
#11 0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7fa52f69d700 (LWP 2620)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
#1  0x00007fa54ca8679e in wait (this=<value optimized out>, mutex=0x1ef3a50, time=1000) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x1ef3a50, time=1000) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fa5490ab28b in ?? () from /usr/lib/libkdevplatformlanguage.so.3
#4  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x1ef3a30) at thread/qthread_unix.cpp:320
#5  0x00007fa54ab44d8c in start_thread (arg=0x7fa52f69d700) at pthread_create.c:304
#6  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7fa5295ee700 (LWP 2626)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa54ca8682b in wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fa54418f0b4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x27a22c0, th=0x2792000) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fa544191723 in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x2792000) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fa54419173c in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x2792000) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fa54419173c in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x2792000) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fa54419053f in ThreadWeaver::ThreadRunHelper::run (this=0x7fa5295ede20, parent=0x27a22c0, th=0x2792000) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fa5441905cb in ThreadWeaver::Thread::run (this=0x2792000) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x2792000) at thread/qthread_unix.cpp:320
#10 0x00007fa54ab44d8c in start_thread (arg=0x7fa5295ee700) at pthread_create.c:304
#11 0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7fa525dc9700 (LWP 2627)):
#0  0x00007fa54614b082 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fa54614bf9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa54614c639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa54cb98446 in QEventDispatcherGlib::processEvents (this=0x284cce0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fa54cb6c882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fa54cb6cabc in QEventLoop::exec (this=0x7fa525dc8e00, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fa54ca83924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x2848f90) at thread/qthread_unix.cpp:320
#8  0x00007fa54ab44d8c in start_thread (arg=0x7fa525dc9700) at pthread_create.c:304
#9  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fa523aa2700 (LWP 2631)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa54393a832 in ?? () from /usr/lib/libQtWebKit.so.4
#2  0x00007fa54ab44d8c in start_thread (arg=0x7fa523aa2700) at pthread_create.c:304
#3  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fa521f56700 (LWP 2637)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa534ef42a2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7fa53520d180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007fa534ef42d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7fa53521b254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007fa54ab44d8c in start_thread (arg=0x7fa521f56700) at pthread_create.c:304
#4  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fa521186700 (LWP 2659)):
#0  0x00007fa54cb98448 in QEventDispatcherGlib::processEvents (this=0x3c21fe0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:423
#1  0x00007fa54cb6c882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#2  0x00007fa54cb6cabc in QEventLoop::exec (this=0x7fa521185dd0, flags=...) at kernel/qeventloop.cpp:201
#3  0x00007fa54ca83924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#4  0x00007fa54cb4ec2f in QInotifyFileSystemWatcherEngine::run (this=0x3c21510) at io/qfilesystemwatcher_inotify.cpp:248
#5  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x3c21510) at thread/qthread_unix.cpp:320
#6  0x00007fa54ab44d8c in start_thread (arg=0x7fa521186700) at pthread_create.c:304
#7  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fa51ef3e700 (LWP 2673)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa54ca8682b in wait (this=<value optimized out>, mutex=0xfbc3f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0xfbc3f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fa54418f0b4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0xf88bb0, th=0x42dcb10) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fa544191723 in ThreadWeaver::WorkingHardState::applyForWork (this=0xfbca20, th=0x42dcb10) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fa54419053f in ThreadWeaver::ThreadRunHelper::run (this=0x7fa51ef3de20, parent=0xf88bb0, th=0x42dcb10) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fa5441905cb in ThreadWeaver::Thread::run (this=0x42dcb10) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x42dcb10) at thread/qthread_unix.cpp:320
#8  0x00007fa54ab44d8c in start_thread (arg=0x7fa51ef3e700) at pthread_create.c:304
#9  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fa52093b700 (LWP 2678)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa54ca8682b in wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fa54418f0b4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x27a22c0, th=0x3db4d90) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fa544191723 in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x3db4d90) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fa54419053f in ThreadWeaver::ThreadRunHelper::run (this=0x7fa52093ae20, parent=0x27a22c0, th=0x3db4d90) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fa5441905cb in ThreadWeaver::Thread::run (this=0x3db4d90) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x3db4d90) at thread/qthread_unix.cpp:320
#8  0x00007fa54ab44d8c in start_thread (arg=0x7fa52093b700) at pthread_create.c:304
#9  0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fa51fbad700 (LWP 2679)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa54ca8682b in wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fa54418f0b4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x27a22c0, th=0x42ca8f0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fa544191723 in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x42ca8f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fa54419173c in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x42ca8f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fa54419173c in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x42ca8f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fa54419053f in ThreadWeaver::ThreadRunHelper::run (this=0x7fa51fbace20, parent=0x27a22c0, th=0x42ca8f0) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fa5441905cb in ThreadWeaver::Thread::run (this=0x42ca8f0) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x42ca8f0) at thread/qthread_unix.cpp:320
#10 0x00007fa54ab44d8c in start_thread (arg=0x7fa51fbad700) at pthread_create.c:304
#11 0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fa51e2bf700 (LWP 2680)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa54ca8682b in wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x9c8e40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fa54418f0b4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x27a22c0, th=0x44537f0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fa544191723 in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x44537f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fa54419173c in ThreadWeaver::WorkingHardState::applyForWork (this=0xd37230, th=0x44537f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fa54419053f in ThreadWeaver::ThreadRunHelper::run (this=0x7fa51e2bee20, parent=0x27a22c0, th=0x44537f0) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007fa5441905cb in ThreadWeaver::Thread::run (this=0x44537f0) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007fa54ca86175 in QThreadPrivate::start (arg=0x44537f0) at thread/qthread_unix.cpp:320
#9  0x00007fa54ab44d8c in start_thread (arg=0x7fa51e2bf700) at pthread_create.c:304
#10 0x00007fa54b7bd04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa54e589780 (LWP 2618)):
[KCrash Handler]
#6  0x00007fa54b70ad05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#7  0x00007fa54b70eab6 in abort () at abort.c:92
#8  0x00007fa54ca7cad4 in qt_message_output (msgType=<value optimized out>, buf=<value optimized out>) at global/qglobal.cpp:2282
#9  0x00007fa54ca7cc8f in qt_message(QtMsgType, const char *, typedef __va_list_tag __va_list_tag *) (msgType=QtFatalMsg, msg=0x7fa54cbcc0a8 "ASSERT: \"%s\" in file %s, line %d", ap=0x7fffe1c05420) at global/qglobal.cpp:2328
#10 0x00007fa54ca7ce31 in qFatal (msg=<value optimized out>) at global/qglobal.cpp:2511
#11 0x00007fa5349ddbf1 in KateCodeFoldingTree::applyFoldingState (this=0x2e29a80) at /home/tomek2/kde/kate/part/syntax/katecodefolding.cpp:1636
#12 0x00007fa5348d4c34 in KateCodeFoldingTree::qt_metacall (this=0x2e29a80, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0x7fffe1c05680) at /home/tomek2/kde/build/part/moc_katecodefolding.cpp:106
#13 0x00007fa54cb825f8 in QMetaObject::activate (sender=0x2e34400, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fffe1c05680) at kernel/qobject.cpp:3287
#14 0x00007fa54d798277 in KTextEditor::Document::reloaded (this=0x2e34400, _t1=0x2e34400) at /home/tomek2/kde/build/ktexteditor/document.moc:236
#15 0x00007fa534954281 in KateDocument::documentReload (this=0x2e34400) at /home/tomek2/kde/kate/part/document/katedocument.cpp:3972
#16 0x00007fa54da45fb5 in KDevelop::TextDocument::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdevplatformshell.so.3
#17 0x00007fa54cb825f8 in QMetaObject::activate (sender=0x42c5bb0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fffe1c05be0) at kernel/qobject.cpp:3287
#18 0x00007fa54bf24122 in QAction::triggered (this=<value optimized out>, _t1=false) at .moc/release-shared/moc_qaction.cpp:263
#19 0x00007fa54bf2430f in QAction::activate (this=0x42c5bb0, event=<value optimized out>) at kernel/qaction.cpp:1257
#20 0x00007fa54c3689f3 in QMenuPrivate::activateCausedStack (this=0xe234e0, causedStack=..., action=0x42c5bb0, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:993
#21 0x00007fa54c36e9aa in QMenuPrivate::activateAction (this=0xe234e0, action=0x42c5bb0, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1085
#22 0x00007fa54d41bbfd in KMenu::mouseReleaseEvent (this=0x7fffe1c07510, e=<value optimized out>) at ../../kdeui/widgets/kmenu.cpp:458
#23 0x00007fa54bf7bcc8 in QWidget::event (this=0x7fffe1c07510, event=0x7fffe1c06850) at kernel/qwidget.cpp:8259
#24 0x00007fa54c36fb8b in QMenu::event (this=0x7fffe1c07510, e=0x7fffe1c06850) at widgets/qmenu.cpp:2415
#25 0x00007fa54bf2a9f4 in QApplicationPrivate::notify_helper (this=0x922550, receiver=0x7fffe1c07510, e=0x7fffe1c06850) at kernel/qapplication.cpp:4462
#26 0x00007fa54bf2fdc3 in QApplication::notify (this=<value optimized out>, receiver=0x7fffe1c07510, e=0x7fffe1c06850) at kernel/qapplication.cpp:4023
#27 0x00007fa54d3556c6 in KApplication::notify (this=0x7fffe1c09110, receiver=0x7fffe1c07510, event=0x7fffe1c06850) at ../../kdeui/kernel/kapplication.cpp:311
#28 0x0000000000404bf6 in _start ()

Reported using DrKonqi