Bug 293977

Application: kdevelop (4.2.81)
KDE Platform Version: 4.6.5 (4.6.5)
Qt Version: 4.7.4
Operating System: Linux 2.6.38.8-desktop-10.mga x86_64
Distribution: "Mageia 1"

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

I was using QTextEdit class and start typing method for the object. In the auto-completion pop-up I selected clear() method, pressed Alt to see more information and then clicked on link to open documentation about QTextEdit::clear(), then KDevelop crashed.

-- Backtrace:
Application: KDevelop (kdevelop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f64c247d720 (LWP 6757))]

Thread 10 (Thread 0x7f64a9ad1700 (LWP 6760)):
#0  0x00007f64be34d4b9 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f64be5d2832 in wait (this=<value optimized out>, mutex=0x20c1f10, time=1000) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x20c1f10, time=1000) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f64bad289ab in KDevelop::DUChainPrivate::CleanupThread::run() () from /usr/lib64/libkdevplatformlanguage.so.5
#4  0x00007f64be5d21e5 in QThreadPrivate::start (arg=0x20c1ef0) at thread/qthread_unix.cpp:331
#5  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7f6495d0b700 (LWP 6764)):
#0  0x00007f64bca00a33 in poll () from /lib64/libc.so.6
#1  0x00007f64b78ab304 in g_main_context_poll (context=0x7f64880009b0, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3404
#2  g_main_context_iterate (context=0x7f64880009b0, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3086
#3  0x00007f64b78ab83d in g_main_context_iteration (context=0x7f64880009b0, may_block=1) at gmain.c:3154
#4  0x00007f64be6e7986 in QEventDispatcherGlib::processEvents (this=0x7f64880008c0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f64be6bb6d2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f64be6bb91c in QEventLoop::exec (this=0x7f6495d0ae60, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f64be5cf944 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:498
#8  0x00007f64be5d21e5 in QThreadPrivate::start (arg=0x2b74a80) at thread/qthread_unix.cpp:331
#9  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f649550a700 (LWP 6765)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f6495509b50 in ?? ()
#2  0x00007fff5357c7b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 7 (Thread 0x7f6494d09700 (LWP 6771)):
#0  0x00007f64be34d14c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f64bb980574 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f64bbc9b180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f64bb9805a9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f64bbca9254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f648fbef700 (LWP 6793)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f648fbeeb10 in ?? ()
#2  0x00007fff5357c7b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 5 (Thread 0x7f648e184700 (LWP 6838)):
#0  0x00007f64be34d14c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f64b64b7274 in WTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib64/libQtWebKit.so.4
#2  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#3  0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f648e985700 (LWP 6839)):
#0  0x00007f64be34c4ab in __pthread_mutex_unlock_usercnt () from /lib64/libpthread.so.0
#1  0x00007f64b78ab2f8 in g_main_context_poll (context=0x7f647c002970, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3403
#2  g_main_context_iterate (context=0x7f647c002970, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3086
#3  0x00007f64b78ab83d in g_main_context_iteration (context=0x7f647c002970, may_block=1) at gmain.c:3154
#4  0x00007f64be6e7986 in QEventDispatcherGlib::processEvents (this=0x7f647c016070, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f64be6bb6d2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f64be6bb91c in QEventLoop::exec (this=0x7f648e984e60, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f64be5cf944 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:498
#8  0x00007f64be5d21e5 in QThreadPrivate::start (arg=0x35f7500) at thread/qthread_unix.cpp:331
#9  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f647be0c700 (LWP 7198)):
#0  0x00007f64be34d14c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f64be5d28cb in wait (this=<value optimized out>, mutex=0xfb9410, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0xfb9410, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f64c09072e4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x11082c0, th=0xe49330) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f64c0909973 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1098460, th=0xe49330) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f64c090998c in ThreadWeaver::WorkingHardState::applyForWork (this=0x1098460, th=0xe49330) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f64c090875f in ThreadWeaver::ThreadRunHelper::run (this=0x7f647be0be70, parent=0x11082c0, th=0xe49330) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/Thread.cpp:87
#7  0x00007f64c09087e8 in ThreadWeaver::Thread::run (this=0xe49330) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/Thread.cpp:142
#8  0x00007f64be5d21e5 in QThreadPrivate::start (arg=0xe49330) at thread/qthread_unix.cpp:331
#9  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f647b60b700 (LWP 7199)):
#0  0x00007f64be34d14c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f64be5d28cb in wait (this=<value optimized out>, mutex=0xfb9410, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0xfb9410, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f64c09072e4 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x11082c0, th=0x7f6474001f30) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f64c0909973 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1098460, th=0x7f6474001f30) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f64c090875f in ThreadWeaver::ThreadRunHelper::run (this=0x7f647b60ae70, parent=0x11082c0, th=0x7f6474001f30) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/Thread.cpp:87
#6  0x00007f64c09087e8 in ThreadWeaver::Thread::run (this=0x7f6474001f30) at /usr/src/debug/kdelibs-4.6.5/threadweaver/Weaver/Thread.cpp:142
#7  0x00007f64be5d21e5 in QThreadPrivate::start (arg=0x7f6474001f30) at thread/qthread_unix.cpp:331
#8  0x00007f64be348d25 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f64bca0b23d in clone () from /lib64/libc.so.6
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f64c247d720 (LWP 6757)):
[KCrash Handler]
#6  QFlags (this=0x0) at ../../src/corelib/global/qglobal.h:2191
#7  QTextControl::textInteractionFlags (this=0x0) at text/qtextcontrol.cpp:2807
#8  0x00007f64bdcc725a in QTextEdit::isReadOnly (this=<value optimized out>) at widgets/qtextedit.cpp:2068
#9  0x00007f64bdcc8345 in QTextEdit::mouseReleaseEvent (this=0x6a94d10, e=0x7fff53421780) at widgets/qtextedit.cpp:1580
#10 0x00007f64bd8a566c in QWidget::event (this=0x6a94d10, event=0x7fff53421780) at kernel/qwidget.cpp:8295
#11 0x00007f64bdc5a186 in QFrame::event (this=0x6a94d10, e=0x7fff53421780) at widgets/qframe.cpp:557
#12 0x00007f64be6bc4a7 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x552fea0, event=0x7fff53421780) at kernel/qcoreapplication.cpp:902
#13 0x00007f64bd853761 in QApplicationPrivate::notify_helper (this=0xdedee0, receiver=0x552fea0, e=0x7fff53421780) at kernel/qapplication.cpp:4477
#14 0x00007f64bd858bec in QApplication::notify (this=<value optimized out>, receiver=0x552fea0, e=0x7fff53421780) at kernel/qapplication.cpp:4042
#15 0x00007f64beea7e06 in KApplication::notify (this=0x7fff53422730, receiver=0x552fea0, event=0x7fff53421780) at /usr/src/debug/kdelibs-4.6.5/kdeui/kernel/kapplication.cpp:311
#16 0x00007f64be6bc31c in QCoreApplication::notifyInternal (this=0x7fff53422730, receiver=0x552fea0, event=0x7fff53421780) at kernel/qcoreapplication.cpp:787
#17 0x00007f64bd854795 in sendEvent (receiver=0x552fea0, event=0x7fff53421780, alienWidget=0x552fea0, nativeWidget=0x688caf0, buttonDown=0x7f64be33f178, lastMouseReceiver=..., spontaneous=true)
    at ../../src/corelib/kernel/qcoreapplication.h:215
#18 QApplicationPrivate::sendMouseEvent (receiver=0x552fea0, event=0x7fff53421780, alienWidget=0x552fea0, nativeWidget=0x688caf0, buttonDown=0x7f64be33f178, lastMouseReceiver=..., spontaneous=true)
    at kernel/qapplication.cpp:3141
#19 0x00007f64bd8d41a8 in QETWidget::translateMouseEvent (this=0x688caf0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4461
#20 0x00007f64bd8d2859 in QApplication::x11ProcessEvent (this=0x7fff53422730, event=0x7fff534220d0) at kernel/qapplication_x11.cpp:3587
#21 0x00007f64bd8fa712 in x11EventSourceDispatch (s=0xdf97e0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#22 0x00007f64b78aadc3 in g_main_dispatch (context=0xdf24e0) at gmain.c:2440
#23 g_main_context_dispatch (context=0xdf24e0) at gmain.c:3013
#24 0x00007f64b78ab5a0 in g_main_context_iterate (context=0xdf24e0, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3091
#25 0x00007f64b78ab83d in g_main_context_iteration (context=0xdf24e0, may_block=1) at gmain.c:3154
#26 0x00007f64be6e792f in QEventDispatcherGlib::processEvents (this=0xdc4a40, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f64bd8fa3ae in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f64be6bb6d2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f64be6bb91c in QEventLoop::exec (this=0x7fff534223e0, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f64be6bfddb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x000000000040bbb2 in main (argc=<value optimized out>, argv=0x7fff53424628) at /home/nekit/Temp/kdevelop-4.2.81/app/main.cpp:479

Reported using DrKonqi