Application: plasma-desktop (4.11.11)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.19.0-32-generic x86_64
Distribution: Linux Mint 17.3 Rosa

-- Information about the crash:
- What I was doing when the application crashed:
I created a Folder View (I think, on a Grid Desktop) and moved it from my primary screen to another screen. THIS CRASH happened immediately after a subsequent (soft) reboot.
- Unusual behavior I noticed:
Also several widgets (at least) seem to [behave weirdly / get stuck / vanish] when moved across a screen border.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f214785b7c0 (LWP 2284))]

Thread 5 (Thread 0x7f211abe7700 (LWP 2303)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f214050fffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f2140510039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f213b086184 in start_thread (arg=0x7f211abe7700) at pthread_create.c:312
#4  0x00007f214715137d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f20958c4700 (LWP 2323)):
#0  0x00007f2147143fdd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f213a974fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f213a9750ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2143d257be in QEventDispatcherGlib::processEvents (this=0x7f20900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f2143cf70af in QEventLoop::processEvents (this=this@entry=0x7f20958c3de0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f2143cf73a5 in QEventLoop::exec (this=this@entry=0x7f20958c3de0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f2143bf3c5f in QThread::exec (this=this@entry=0x3199060) at thread/qthread.cpp:537
#7  0x00007f2143cd8823 in QInotifyFileSystemWatcherEngine::run (this=0x3199060) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f2143bf632f in QThreadPrivate::start (arg=0x3199060) at thread/qthread_unix.cpp:349
#9  0x00007f213b086184 in start_thread (arg=0x7f20958c4700) at pthread_create.c:312
#10 0x00007f214715137d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f208f268700 (LWP 2326)):
#0  0x00007f21471426cd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f213a9b5c10 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f213a974b14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f213a974f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f213a97530a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f208fd64336 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f213a999f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f213b086184 in start_thread (arg=0x7f208f268700) at pthread_create.c:312
#8  0x00007f214715137d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f208e3ef700 (LWP 2327)):
#0  0x00007f213b0885b1 in __GI___pthread_mutex_lock (mutex=0x7f2084000a60) at ../nptl/pthread_mutex_lock.c:146
#1  0x00007f213a9b6981 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f213a974ed5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f213a9750ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2143d257be in QEventDispatcherGlib::processEvents (this=0x7f20840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#5  0x00007f2143cf70af in QEventLoop::processEvents (this=this@entry=0x7f208e3eede0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f2143cf73a5 in QEventLoop::exec (this=this@entry=0x7f208e3eede0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f2143bf3c5f in QThread::exec (this=this@entry=0x3291e70) at thread/qthread.cpp:537
#8  0x00007f2143cd8823 in QInotifyFileSystemWatcherEngine::run (this=0x3291e70) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f2143bf632f in QThreadPrivate::start (arg=0x3291e70) at thread/qthread_unix.cpp:349
#10 0x00007f213b086184 in start_thread (arg=0x7f208e3ef700) at pthread_create.c:312
#11 0x00007f214715137d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f214785b7c0 (LWP 2284)):
[KCrash Handler]
#6  findChar (str=0xd000000000000000, len=<optimized out>, ch=..., from=0, cs=cs@entry=Qt::CaseSensitive) at tools/qstring.cpp:342
#7  0x00007f2143c3a3aa in QString::indexOf (this=this@entry=0x7ffc3d03b970, ch=..., ch@entry=..., from=<optimized out>, cs=cs@entry=Qt::CaseSensitive) at tools/qstring.cpp:2626
#8  0x00007f21430b634b in QKeySequence::mnemonic (text=...) at kernel/qkeysequence.cpp:1093
#9  0x00007f21434e2765 in QTabBar::insertTab (this=0x263b9a0, index=3, index@entry=-1, icon=..., text=...) at widgets/qtabbar.cpp:848
#10 0x00007f2146d43b8b in Plasma::TabBar::insertTab (this=this@entry=0x263c940, index=index@entry=-1, icon=..., label=..., content=content@entry=0x270a860) at ../../plasma/widgets/tabbar.cpp:310
#11 0x00007f2146d43d64 in Plasma::TabBar::insertTab (this=0x263c940, index=index@entry=-1, label=..., content=content@entry=0x270a860) at ../../plasma/widgets/tabbar.cpp:319
#12 0x00007f211fe8ecf7 in TabbingGroup::restoreChildGroupInfo (this=0x2691600, child=0x270a840, group=...) at ../../../../containments/groupingdesktop/lib/groups/tabbinggroup.cpp:154
#13 0x00007f211fe753f1 in AbstractGroup::restoreChildren (this=this@entry=0x2691600) at ../../../../containments/groupingdesktop/lib/abstractgroup.cpp:615
#14 0x00007f211fe8f75d in TabbingGroup::restoreChildren (this=0x2691600) at ../../../../containments/groupingdesktop/lib/groups/tabbinggroup.cpp:140
#15 0x00007f211fe72824 in AbstractGroupPrivate::restoreChildren (this=0x269f6c0) at ../../../../containments/groupingdesktop/lib/abstractgroup.cpp:187
#16 0x00007f211fe7b40c in GroupingContainmentPrivate::restoreGroups (this=<optimized out>) at ../../../../containments/groupingdesktop/lib/groupingcontainment.cpp:508
#17 0x00007f2143d10c1e in QObject::event (this=this@entry=0x25770e0, e=e@entry=0x26edd20) at kernel/qobject.cpp:1194
#18 0x00007f21436914fb in QGraphicsWidget::event (this=0x25770e0, event=0x26edd20) at graphicsview/qgraphicswidget.cpp:1461
#19 0x00007f2143091e2c in QApplicationPrivate::notify_helper (this=this@entry=0x2287910, receiver=receiver@entry=0x25770e0, e=e@entry=0x26edd20) at kernel/qapplication.cpp:4567
#20 0x00007f21430984a0 in QApplication::notify (this=this@entry=0x2272280, receiver=receiver@entry=0x25770e0, e=e@entry=0x26edd20) at kernel/qapplication.cpp:4353
#21 0x00007f21449bdcca in KApplication::notify (this=0x2272280, receiver=0x25770e0, event=0x26edd20) at ../../kdeui/kernel/kapplication.cpp:311
#22 0x00007f2143cf84dd in QCoreApplication::notifyInternal (this=0x2272280, receiver=receiver@entry=0x25770e0, event=event@entry=0x26edd20) at kernel/qcoreapplication.cpp:953
#23 0x00007f2143cfbb3d in sendEvent (event=0x26edd20, receiver=0x25770e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#24 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x21fd090) at kernel/qcoreapplication.cpp:1577
#25 0x00007f2143cfbfe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#26 0x00007f2143d25f83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#27 postEventSourceDispatch (s=0x2282600) at kernel/qeventdispatcher_glib.cpp:287
#28 0x00007f213a974e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f213a975048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f213a9750ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f2143d257a1 in QEventDispatcherGlib::processEvents (this=0x2277ea0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#32 0x00007f2143133be6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#33 0x00007f2143cf70af in QEventLoop::processEvents (this=this@entry=0x7ffc3d03c270, flags=...) at kernel/qeventloop.cpp:149
#34 0x00007f2143cf73a5 in QEventLoop::exec (this=this@entry=0x7ffc3d03c270, flags=...) at kernel/qeventloop.cpp:204
#35 0x00007f2143cfcb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#36 0x00007f214309037c in QApplication::exec () at kernel/qapplication.cpp:3828
#37 0x00007f214745867c in kdemain (argc=1, argv=0x7ffc3d03c4c8) at ../../../../plasma/desktop/shell/main.cpp:126
#38 0x00007f2147078f45 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7ffc3d03c4c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc3d03c4b8) at libc-start.c:287
#39 0x000000000040070e in _start ()

Reported using DrKonqi