Bug 356265

Application: systemsettings5 (5.4.1)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-18-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:
All I have to do is open it and it crashes every time.
- Unusual behavior I noticed:
I first accessed it thouigh the starup programs app. Also if I navigate to a floder that contains .desktop files in Dolphin, the icons show up fine but clicking on one crashes Dolphin.
- Custom settings of the application:
I think I changed the association for  ".desktop" or deleled it mistakenly prior to the crashing behavior.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc764121800 (LWP 23736))]

Thread 2 (Thread 0x7fc752ca1700 (LWP 23737)):
#0  0x00007fc7608cd8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc75e5ddbd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fc75e5df74f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fc7551efa39 in QXcbEventReader::run (this=0x8fca20) at qxcbconnection.cpp:1105
#4  0x00007fc760fc02be in QThreadPrivate::start (arg=0x8fca20) at thread/qthread_unix.cpp:337
#5  0x00007fc75dd686aa in start_thread (arg=0x7fc752ca1700) at pthread_create.c:333
#6  0x00007fc7608d8eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fc764121800 (LWP 23736)):
[KCrash Handler]
#6  operator== (s1=..., s2=...) at tools/qstring.cpp:2521
#7  0x00007fc76122abb6 in operator!= (s2=..., s1=...) at ../../include/QtCore/../../src/corelib/tools/qstring.h:587
#8  QMimeBinaryProvider::loadMimeTypePrivate (this=<optimized out>, data=...) at mimetypes/qmimeprovider.cpp:626
#9  0x00007fc76121e3ba in QMimeType::comment (this=this@entry=0x10b1be0) at mimetypes/qmimetype.cpp:223
#10 0x00007fc740b346af in MimeTypeData::initFromQMimeType (this=this@entry=0x10b1be0) at ../../keditfiletype/mimetypedata.cpp:89
#11 0x00007fc740b36055 in MimeTypeData::MimeTypeData (this=0x10b1be0, mime=...) at ../../keditfiletype/mimetypedata.cpp:63
#12 0x00007fc740b31949 in TypesListItem::TypesListItem (this=0x10b1ba0, parent=<optimized out>, mimetype=...) at ../../keditfiletype/typeslistitem.cpp:38
#13 0x00007fc740b2b3f4 in FileTypesView::readFileTypes (this=this@entry=0xa654c0) at ../../keditfiletype/filetypesview.cpp:203
#14 0x00007fc740b2b6f8 in FileTypesView::load (this=0xa654c0) at ../../keditfiletype/filetypesview.cpp:464
#15 0x00007fc763310499 in KCModule::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at moc_kcmodule.cpp:107
#16 0x00007fc7611d1651 in QObject::event (this=this@entry=0xa654c0, e=e@entry=0xdfad30) at kernel/qobject.cpp:1245
#17 0x00007fc762665edb in QWidget::event (this=0xa654c0, event=0xdfad30) at kernel/qwidget.cpp:9084
#18 0x00007fc762623b8c in QApplicationPrivate::notify_helper (this=this@entry=0x8dc7f0, receiver=receiver@entry=0xa654c0, e=e@entry=0xdfad30) at kernel/qapplication.cpp:3720
#19 0x00007fc762629230 in QApplication::notify (this=0x7ffeacbc8bc0, receiver=0xa654c0, e=0xdfad30) at kernel/qapplication.cpp:3503
#20 0x00007fc76119ff1b in QCoreApplication::notifyInternal (this=0x7ffeacbc8bc0, receiver=0xa654c0, event=event@entry=0xdfad30) at kernel/qcoreapplication.cpp:935
#21 0x00007fc7611a2057 in QCoreApplication::sendEvent (event=0xdfad30, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x8da000) at kernel/qcoreapplication.cpp:1552
#23 0x00007fc7611a2588 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#24 0x00007fc7611f6e73 in postEventSourceDispatch (s=0x9334c0) at kernel/qeventdispatcher_glib.cpp:271
#25 0x00007fc75d848ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fc75d849250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fc75d8492fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fc7611f727f in QEventDispatcherGlib::processEvents (this=0x93cbf0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#29 0x00007fc76119d75a in QEventLoop::exec (this=this@entry=0x7ffeacbc8aa0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#30 0x00007fc7611a52cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#31 0x00007fc76207000c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#32 0x00007fc762620025 in QApplication::exec () at kernel/qapplication.cpp:2956
#33 0x000000000040f04b in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:55

Possible duplicates by query: bug 355012.

Reported using DrKonqi