[Bug 170598] New: kget crashed when selecting several downloads from list

http://bugs.kde.org/show_bug.cgi?id=170598

           Summary: kget crashed when selecting several downloads from list
           Product: kget
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: NEW
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: kget@...
        ReportedBy: Regnaron@...


Version:           2.1.1 (using 4.1.1 (KDE 4.1.1), Gentoo)
Compiler:          i686-pc-linux-gnu-gcc
OS:                Linux (i686) release 2.6.25-gentoo-r7

Today I downloaded two files with kget. After both downloads were finished, I
selected the first one by clicking on it (it expanded) and then selected the
second one by hitting shift+down. KGet from KDE-4.1.1 then crashed with the
backtrace below. Regrettably I am not able to reproduce this crash.

Application: KGet (kget), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb61a3700 (LWP 2340)]
[KCrash handler]
#6  0xb7d0c160 in QWidget::hide (this=0x82f65b0)
    at /usr/include/qt4/QtGui/qwidget.h:474
#7  0xb7d9e0c8 in KExtendableItemDelegate::Private::_k_verticalScroll (
    this=0x81b3ec0)
    at
/var/tmp/portage/kde-base/kdelibs-4.1.1/work/kdelibs-4.1.1/kdeui/itemviews/kextendableitemdelegate.cpp:158
#8  0xb7d9f24c in KExtendableItemDelegate::qt_metacall (this=0x81bba08,
    _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbff2d27c)
    at
/var/tmp/portage/kde-base/kdelibs-4.1.1/work/kdelibs_build/kdeui/kextendableitemdelegate.moc:77
#9  0x080716db in TransfersViewDelegate::qt_metacall (this=0x81bba08,
    _c=QMetaObject::InvokeMetaMethod, _id=13, _a=0xbff2d27c)
    at
/var/tmp/portage/kde-base/kget-4.1.1/work/kget_build/kget/transfersviewdelegate.moc:159
#10 0xb75c0131 in QMetaObject::activate (sender=0x81040c0,
    from_signal_index=<value optimized out>, to_signal_index=27,
    argv=0xbff2d27c) at kernel/qobject.cpp:3007
#11 0xb75c2028 in QMetaObject::activate (sender=0x81040c0, m=0xb6fd84b4,
    local_signal_index=0, argv=0xbff2d27c) at kernel/qobject.cpp:3077
#12 0xb6e08449 in QAbstractSlider::valueChanged (this=0x81040c0, _t1=1)
    at .moc/debug-shared/moc_qabstractslider.cpp:161
#13 0xb6b63061 in QAbstractSlider::setValue (this=0x81040c0, value=1)
    at widgets/qabstractslider.cpp:533
#14 0xb6d298f1 in QTreeView::scrollTo (this=0x81a7600, index=@0x833df60,
    hint=QAbstractItemView::EnsureVisible) at itemviews/qtreeview.cpp:1149
#15 0xb6ce4cc8 in QAbstractItemView::currentChanged (this=0x81a7600,
    current=@0x833df60, previous=@0x80ae508)
    at itemviews/qabstractitemview.cpp:3044
#16 0xb6d1eb3d in QTreeView::currentChanged (this=0x81a7600,
    current=@0x833df60, previous=@0x80ae508) at itemviews/qtreeview.cpp:3704
#17 0xb6ce45e4 in QAbstractItemView::qt_metacall (this=0x81a7600,
    _c=QMetaObject::InvokeMetaMethod, _id=20, _a=0xbff2d568)
    at .moc/debug-shared/moc_qabstractitemview.cpp:227
#18 0xb6d2a14e in QTreeView::qt_metacall (this=0x81a7600,
    _c=QMetaObject::InvokeMetaMethod, _id=51, _a=0xbff2d568)
    at .moc/debug-shared/moc_qtreeview.cpp:119
#19 0x08070555 in TransfersView::qt_metacall (this=0x81a7600,
    _c=QMetaObject::InvokeMetaMethod, _id=51, _a=0xbff2d568)
    at
/var/tmp/portage/kde-base/kget-4.1.1/work/kget_build/kget/transfersview.moc:60
#20 0xb75c0131 in QMetaObject::activate (sender=0x8166610,
    from_signal_index=<value optimized out>, to_signal_index=5,
    argv=0xbff2d568) at kernel/qobject.cpp:3007
#21 0xb75c2028 in QMetaObject::activate (sender=0x8166610, m=0xb6fd3a2c,
    local_signal_index=1, argv=0xbff2d568) at kernel/qobject.cpp:3077
#22 0xb6d329ed in QItemSelectionModel::currentChanged (this=0x8166610,
    _t1=@0x833df60, _t2=@0x80ae508)
    at .moc/debug-shared/moc_qitemselectionmodel.cpp:151
#23 0xb6d32b77 in QItemSelectionModel::setCurrentIndex (this=0x8166610,
    index=@0x833df60, command={i = -1074603956})
    at itemviews/qitemselectionmodel.cpp:1088
#24 0xb6cdd2b4 in QAbstractItemView::keyPressEvent (this=0x81a7600,
    event=0xbff2de1c) at itemviews/qabstractitemview.cpp:2040
#25 0xb6d2921d in QTreeView::keyPressEvent (this=0x81a7600, event=0xbff2de1c)
    at itemviews/qtreeview.cpp:1865
#26 0xb6873086 in QWidget::event (this=0x81a7600, event=0xbff2de1c)
    at kernel/qwidget.cpp:7056
#27 0xb6bae193 in QFrame::event (this=0x81a7600, e=0xbff2de1c)
    at widgets/qframe.cpp:657
#28 0xb6c4141d in QAbstractScrollArea::event (this=0x81a7600, e=0xbff2de1c)
    at widgets/qabstractscrollarea.cpp:903
#29 0xb6cdc27e in QAbstractItemView::event (this=0x81a7600, event=0xbff2de1c)
    at itemviews/qabstractitemview.cpp:1373
#30 0xb681af1b in QApplicationPrivate::notify_helper (this=0x80b22b8,
    receiver=0x81a7600, e=0xbff2de1c) at kernel/qapplication.cpp:3800
#31 0xb6822a2b in QApplication::notify (this=0xbff2e700, receiver=0x81a7600,
    e=0xbff2de1c) at kernel/qapplication.cpp:3446
#32 0xb7dbbce9 in KApplication::notify (this=0xbff2e700, receiver=0x81a7600,
    event=0xbff2de1c)
    at
/var/tmp/portage/kde-base/kdelibs-4.1.1/work/kdelibs-4.1.1/kdeui/kernel/kapplication.cpp:311
#33 0xb75a9771 in QCoreApplication::notifyInternal (this=0xbff2e700,
    receiver=0x81a7600, event=0xbff2de1c) at kernel/qcoreapplication.cpp:591
#34 0xb687b71c in qt_sendSpontaneousEvent (receiver=0x81a7600, event=0x2)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#35 0xb68acc8b in QKeyMapper::sendKeyEvent (keyWidget=0x81a7600, grab=false,
    type=QEvent::KeyPress, code=16777237, modifiers={i = -1074601764},
    text=@0xbff2e108, autorepeat=<value optimized out>, count=1,
    nativeScanCode=116, nativeVirtualKey=65364, nativeModifiers=1)
    at kernel/qkeymapper_x11.cpp:1658
#36 0xb68aebb2 in QKeyMapperPrivate::translateKeyEvent (this=0x80cc798,
    keyWidget=0x81a7600, event=0xbff2e578, grab=176)
    at kernel/qkeymapper_x11.cpp:1629
#37 0xb6889d62 in QApplication::x11ProcessEvent (this=0xbff2e700,
    event=0xbff2e578) at kernel/qapplication_x11.cpp:3059
#38 0xb68b035d in QEventDispatcherX11::processEvents (this=0x80b2370, flags=
      {i = -1074600424}) at kernel/qeventdispatcher_x11.cpp:134
#39 0xb75a8300 in QEventLoop::processEvents (this=0xbff2e690, flags=
      {i = -1074600360}) at kernel/qeventloop.cpp:149
#40 0xb75a84a2 in QEventLoop::exec (this=0xbff2e690, flags={i = -1074600296})
    at kernel/qeventloop.cpp:200
#41 0xb75aa8bf in QCoreApplication::exec () at kernel/qcoreapplication.cpp:849
#42 0xb681acb3 in QApplication::exec () at kernel/qapplication.cpp:3330
#43 0x080907fe in main (argc=3, argv=0xbff2e8e4)
    at /var/tmp/portage/kde-base/kget-4.1.1/work/kget-4.1.1/kget/main.cpp:153
#0  0xffffe424 in __kernel_vsyscall ()


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Urs Wolfer uwolfer kde org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




--- Comment #1 from Urs Wolfer <uwolfer kde org>  2008-09-14 14:07:21 ---
This bug is most probably already fixed in trunk. If you can verify, we could
also backport it to the KDE 4.1 branch.

SVN commit 858415 by ahartmetz:

- Do not treat about-to-be-deleted extenders as still present, hopefully fixing
  hard to reproduce bugs in KGet.
- Properly document that the delegate takes ownership of extenders.


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--- Comment #2 from Oliver Putz <Regnaron web de>  2008-09-14 20:40:26 ---
Hi, regrettably the current kdelibs SVN checkout fails to compile on my
machine. So currently I cannot verify if this bug is still valid in trunk.
However, if I manage to compile some trunk version in the future I'll see if
this bug is still valid (and if so, I'll just reopen this one)


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--- Comment #3 from Oliver Putz <Regnaron web de>  2008-10-22 09:47:36 ---
Hi, not sure if it is still helpful, but I just wanted to say that this bug
indeed seems to have been fixed in trunk (perhaps by commit 858415). So
backporting that fix might be a reasonable idea.


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--- Comment #4 from Urs Wolfer <uwolfer kde org>  2008-10-22 19:32:32 ---
SVN commit 874881 by uwolfer:

Backport:
SVN commit 858415 by ahartmetz:

- Do not treat about-to-be-deleted extenders as still present, hopefully fixing
  hard to reproduce bugs in KGet.
- Properly document that the delegate takes ownership of extenders.

CCBUG:170598

 M  +9 -7      kextendableitemdelegate.cpp  
 M  +4 -3      kextendableitemdelegate.h  


WebSVN link: http://websvn.kde.org/?view=rev&revision=874881


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