Bug 353542

When i was ended work with my project, always that i close Kdevelop crash, i see in the stack trace thatas is the document viewer.
Note that i am using Debian testing and i need to put this into /etc/enviroment to make KDevelop (KDE in general) to recognize the Qt5 plugins

QT_PLUGIN_PATH="$QT_PLUGIN_PATH:/usr/lib/x86_64-linux-gnu/plugins/"
QML_IMPORT_PATH="$QML_IMPORT_PATH:/usr/lib/x86_64-linux-gnu/qml/"
QML2_IMPORT_PATH="$QML2_IMPORT_PATH:/usr/lib/x86_64-linux-gnu/qml/"

Because that (i think) he has 2 sets of CMake,Man Pages, QMake documentations, it seems that load twice.

Reproducible: Always

Steps to Reproduce:
1. Open KDevelop
2. Work with some code.
3. Close KDevelop



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Thread 1 (Thread 0x7ff748fd0940 (LWP 27527)):
[KCrash Handler]
#6  0x00007ff761007107 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007ff7610084e8 in __GI_abort () at abort.c:89
#8  0x00007ff76192164d in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007ff76191f6a6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007ff76191f6f1 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007ff7619201af in __cxa_pure_virtual () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#12 0x00007ff75f43e258 in ProvidersModel::data (this=0x589d9d0, index=..., role=0) at /home/luis/Programas/KDevelop/kdev-platform/documentation/documentationview.cpp:269
#13 0x00007ff7629bf261 in QComboBoxPrivate::itemText (this=<optimized out>, index=...) at widgets/qcombobox.cpp:1303
#14 0x00007ff7629bf3a1 in QComboBoxPrivate::_q_emitHighlighted (this=<optimized out>, index=...) at widgets/qcombobox.cpp:1281
#15 0x00007ff761ebf2fa in QMetaObject::activate (sender=sender@entry=0x6abf8e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fff242c87b0) at kernel/qobject.cpp:3717
#16 0x00007ff761ebfaf7 in QMetaObject::activate (sender=sender@entry=0x6abf8e0, m=m@entry=0x7ff7620bf120 <QItemSelectionModel::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fff242c87b0) at kernel/qobject.cpp:3582
#17 0x00007ff761e3fe1a in QItemSelectionModel::currentChanged (this=this@entry=0x6abf8e0, _t1=..., _t2=...) at .moc/moc_qitemselectionmodel.cpp:287
#18 0x00007ff761e4007d in QItemSelectionModel::setCurrentIndex (this=0x6abf8e0, index=..., command=...) at itemmodels/qitemselectionmodel.cpp:1324
#19 0x00007ff762b02332 in QAbstractItemView::setCurrentIndex (this=this@entry=0x3109120, index=...) at itemviews/qabstractitemview.cpp:1060
#20 0x00007ff762b0af9b in QAbstractItemView::rowsAboutToBeRemoved (this=0x3109120, parent=..., start=start@entry=1, end=end@entry=1) at itemviews/qabstractitemview.cpp:3312
#21 0x00007ff762b2cbdd in QListView::rowsAboutToBeRemoved (this=<optimized out>, parent=..., start=1, end=1) at itemviews/qlistview.cpp:749
#22 0x00007ff762b0913a in QAbstractItemView::qt_static_metacall (_o=_o@entry=0x3109120, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=19, _a=_a@entry=0x7fff242c8c00) at .moc/moc_qabstractitemview.cpp:387
#23 0x00007ff761ebf2fa in QMetaObject::activate (sender=sender@entry=0x589d9d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff242c8c00) at kernel/qobject.cpp:3717
#24 0x00007ff761ebfaf7 in QMetaObject::activate (sender=sender@entry=0x589d9d0, m=m@entry=0x7ff7620c1e40 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff242c8c00) at kernel/qobject.cpp:3582
#25 0x00007ff761f36494 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x589d9d0, _t1=..., _t2=_t2@entry=1, _t3=_t3@entry=1) at .moc/moc_qabstractitemmodel.cpp:435
#26 0x00007ff761e371b3 in QAbstractItemModel::beginRemoveRows (this=0x589d9d0, parent=..., first=1, last=1) at itemmodels/qabstractitemmodel.cpp:2660
#27 0x00007ff75f43e3c0 in ProvidersModel::removeProviders (this=0x589d9d0, prov=...) at /home/luis/Programas/KDevelop/kdev-platform/documentation/documentationview.cpp:286
#28 0x00007ff75f43e476 in ProvidersModel::unloaded (this=0x589d9d0, p=0x5e44970) at /home/luis/Programas/KDevelop/kdev-platform/documentation/documentationview.cpp:299
#29 0x00007ff75f441f52 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<KDevelop::IPlugin*>, void, void (ProvidersModel::*)(KDevelop::IPlugin*)>::call (f=(void (ProvidersModel::*)(ProvidersModel * const, KDevelop::IPlugin *)) 0x7ff75f43e41c <ProvidersModel::unloaded(KDevelop::IPlugin*)>, o=0x589d9d0, arg=0x7fff242c8f30) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:500
#30 0x00007ff75f441aa4 in QtPrivate::FunctionPointer<void (ProvidersModel::*)(KDevelop::IPlugin*)>::call<QtPrivate::List<KDevelop::IPlugin*>, void> (f=(void (ProvidersModel::*)(ProvidersModel * const, KDevelop::IPlugin *)) 0x7ff75f43e41c <ProvidersModel::unloaded(KDevelop::IPlugin*)>, o=0x589d9d0, arg=0x7fff242c8f30) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:519
#31 0x00007ff75f441481 in QtPrivate::QSlotObject<void (ProvidersModel::*)(KDevelop::IPlugin*), QtPrivate::List<KDevelop::IPlugin*>, void>::impl (which=1, this_=0x6ba0e90, r=0x589d9d0, a=0x7fff242c8f30, ret=0x0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject_impl.h:143
#32 0x00007ff761ebf187 in QtPrivate::QSlotObjectBase::call (a=0x7fff242c8f30, r=0x589d9d0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#33 QMetaObject::activate (sender=0x2f79340, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3702
#34 0x00007ff765f76f0f in KDevelop::IPluginController::unloadingPlugin (this=0x2f79340, _t1=0x5e44970) at /home/luis/Programas/KDevelop/kdev-platform/build/interfaces/moc_iplugincontroller.cpp:237
#35 0x00007ff767a263d8 in KDevelop::PluginController::unloadPlugin (this=0x2f79340, plugin=0x5e44970, deletion=KDevelop::PluginController::Now) at /home/luis/Programas/KDevelop/kdev-platform/shell/plugincontroller.cpp:439
#36 0x00007ff767a255a2 in KDevelop::PluginController::cleanup (this=0x2f79340) at /home/luis/Programas/KDevelop/kdev-platform/shell/plugincontroller.cpp:336
#37 0x00007ff767a361d8 in KDevelop::Core::cleanup (this=0x2fe4b70) at /home/luis/Programas/KDevelop/kdev-platform/shell/core.cpp:435
#38 0x00007ff767a35f1f in KDevelop::Core::shutdown (this=0x2fe4b70) at /home/luis/Programas/KDevelop/kdev-platform/shell/core.cpp:398
#39 0x00007ff767a14f57 in KDevelop::MainWindow::~MainWindow (this=0x2dc6140, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /home/luis/Programas/KDevelop/kdev-platform/shell/mainwindow.cpp:140
#40 0x00007ff767a1503c in KDevelop::MainWindow::~MainWindow (this=0x2dc6140, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /home/luis/Programas/KDevelop/kdev-platform/shell/mainwindow.cpp:144
#41 0x00007ff761ec01e0 in QObject::event (this=this@entry=0x2dc6140, e=e@entry=0x3c30750) at kernel/qobject.cpp:1236
#42 0x00007ff7628f1edb in QWidget::event (this=this@entry=0x2dc6140, event=event@entry=0x3c30750) at kernel/qwidget.cpp:9084
#43 0x00007ff762a0337b in QMainWindow::event (this=0x2dc6140, event=0x3c30750) at widgets/qmainwindow.cpp:1495
#44 0x00007ff765540b87 in KMainWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#45 0x00007ff765578f45 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#46 0x00007ff7628afb8c in QApplicationPrivate::notify_helper (this=this@entry=0x22349a0, receiver=receiver@entry=0x2dc6140, e=e@entry=0x3c30750) at kernel/qapplication.cpp:3720
#47 0x00007ff7628b5230 in QApplication::notify (this=0x7fff242c9aa0, receiver=0x2dc6140, e=0x3c30750) at kernel/qapplication.cpp:3503
#48 0x00007ff761e8ea8b in QCoreApplication::notifyInternal (this=0x7fff242c9aa0, receiver=0x2dc6140, event=event@entry=0x3c30750) at kernel/qcoreapplication.cpp:935
#49 0x00007ff761e90bc7 in QCoreApplication::sendEvent (event=0x3c30750, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#50 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x222b3e0) at kernel/qcoreapplication.cpp:1552
#51 0x00007ff761e910f8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#52 0x00007ff761ee5a23 in postEventSourceDispatch (s=0x2274b10) at kernel/qeventdispatcher_glib.cpp:271
#53 0x00007ff758efcc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007ff758efcf20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007ff758efcfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#56 0x00007ff761ee5e2f in QEventDispatcherGlib::processEvents (this=0x227b090, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#57 0x00007ff761e8c2ca in QEventLoop::exec (this=this@entry=0x7fff242c9870, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#58 0x00007ff761e93e3c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#59 0x00000000004196b0 in main (argc=1, argv=0x7fff242cb9b8) at /home/luis/Programas/KDevelop/kdevelop/app/main.cpp:636
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