https://bugs.kde.org/show_bug.cgi?id=421291

            Bug ID: 421291
           Summary: Plasma crashes on Wayland when I drag an icon on
                    desktop
           Product: plasmashell
           Version: master
          Platform: unspecified
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: k...@davidedmundson.co.uk
          Reporter: bugsefor...@gmx.com
                CC: plasma-b...@kde.org
  Target Milestone: 1.0

Application: plasmashell (5.18.80)

Qt Version: 5.14.2
Frameworks Version: 5.70.0
Operating System: Linux 5.3.0-45-generic x86_64
Windowing system: Wayland
Distribution: KDE neon Unstable Edition

-- Information about the crash:
- What I was doing when the application crashed:
I have 10 icons on desktop, they are arranged in rows and aligned to left.
Plasma almost always crashes when I drag any of the first 4 icons from left to
right,
but Plasma doesn't crash when I drag any of the other icons.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Content of s_kcrashErrorMessage: [Current thread is 1 (Thread 0x7f34e6885800
(LWP 1123))]
[KCrash Handler]
#6  0x00007f34e47d0c6c in QArrayData::data() (this=<optimized out>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:61
#7  0x00007f34e47d0c6c in
QTypedArrayData<QQuickItemPrivate::ChangeListener>::data() (this=<optimized
out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:208
#8  0x00007f34e47d0c6c in
QTypedArrayData<QQuickItemPrivate::ChangeListener>::begin(QQuickItemPrivate::ChangeListener*)
(this=<optimized out>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qarraydata.h:211
#9  0x00007f34e47d0c6c in
QVector<QQuickItemPrivate::ChangeListener>::realloc(int,
QFlags<QArrayData::AllocationOption>) (this=this@entry=0x561e29f04148,
aalloc=<optimized out>, options=..., options@entry=...) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:720
#10 0x00007f34e47c8501 in QVector<QQuickItemPrivate::ChangeListener>::detach()
(this=<optimized out>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:411
#11 0x00007f34e47c8501 in
QVector<QQuickItemPrivate::ChangeListener>::erase(QQuickItemPrivate::ChangeListener*,
QQuickItemPrivate::ChangeListener*) (aend=<optimized out>, abegin=<optimized
out>, this=<optimized out>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:923
#12 0x00007f34e47c8501 in
QVector<QQuickItemPrivate::ChangeListener>::remove(int) (i=<optimized out>,
this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:484
#13 0x00007f34e47c8501 in
QVector<QQuickItemPrivate::ChangeListener>::removeOne(QQuickItemPrivate::ChangeListener
const&) (t=..., this=<optimized out>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qvector.h:185
#14 0x00007f34e47c8501 in
QQuickItemPrivate::removeItemChangeListener(QQuickItemChangeListener*,
QFlags<QQuickItemPrivate::ChangeType>) (this=this@entry=0x561e29f040d0,
listener=listener@entry=0x561e29f1b9a0, types=..., types@entry=...) at
items/qquickitem.cpp:3955
#15 0x00007f34e48fdada in QQuickShaderEffectSource::~QQuickShaderEffectSource()
(this=0x561e29f1b980, __in_chrg=<optimized out>) at
items/qquickshadereffectsource.cpp:213
#16 0x00007f34e48fdb39 in QQuickShaderEffectSource::~QQuickShaderEffectSource()
(this=0x561e29f1b980, __in_chrg=<optimized out>) at
items/qquickshadereffectsource.cpp:218
#17 0x00007f34b3ee367b in  () at
/usr/lib/x86_64-linux-gnu/qt5/qml/QtGraphicalEffects/private/libqtgraphicaleffectsprivate.so
#18 0x00007f34b3ede575 in  () at
/usr/lib/x86_64-linux-gnu/qt5/qml/QtGraphicalEffects/private/libqtgraphicaleffectsprivate.so
#19 0x00007f34e089eceb in QObjectPrivate::deleteChildren()
(this=0x561e29f13d30) at kernel/qobject.cpp:2123
#20 0x00007f34e08a82ce in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#21 0x00007f34e47cd22d in QQuickItem::~QQuickItem() (this=0x561e29f13c70,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#22 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29f13c70, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#23 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29f13c70, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#24 0x00007f34e089eceb in QObjectPrivate::deleteChildren()
(this=0x561e29f13990) at kernel/qobject.cpp:2123
#25 0x00007f34e08a82ce in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#26 0x00007f34e47cd22d in QQuickItem::~QQuickItem() (this=0x561e29f138d0,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#27 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29f138d0, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#28 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29f138d0, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#29 0x00007f34e089eceb in QObjectPrivate::deleteChildren()
(this=0x561e29f136d0) at kernel/qobject.cpp:2123
#30 0x00007f34e08a82ce in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#31 0x00007f34e47cd22d in QQuickItem::~QQuickItem() (this=0x561e29f13610,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#32 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29f13610, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#33 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29f13610, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#34 0x00007f34e089eceb in QObjectPrivate::deleteChildren()
(this=0x561e29f02e40) at kernel/qobject.cpp:2123
#35 0x00007f34e08a82ce in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#36 0x00007f34e47cd22d in QQuickItem::~QQuickItem() (this=0x561e29f02d80,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#37 0x00007f34e47eddd5 in
QQmlPrivate::QQmlElement<QQuickLoader>::~QQmlElement() (this=0x561e29f02d80,
__in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#38 0x00007f34e47eddd5 in
QQmlPrivate::QQmlElement<QQuickLoader>::~QQmlElement() (this=0x561e29f02d80,
__in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#39 0x00007f34e089eceb in QObjectPrivate::deleteChildren()
(this=0x561e29eff410) at kernel/qobject.cpp:2123
#40 0x00007f34e08a82ce in QObject::~QObject() (this=<optimized out>,
__in_chrg=<optimized out>) at kernel/qobject.cpp:1107
#41 0x00007f34e47cd22d in QQuickItem::~QQuickItem() (this=0x561e29eff350,
__in_chrg=<optimized out>) at items/qquickitem.cpp:2383
#42 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29eff350, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#43 0x00007f34e47edbb5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement()
(this=0x561e29eff350, __in_chrg=<optimized out>) at
../../include/QtQml/../../src/qml/qml/qqmlprivate.h:111
#44 0x00007f34e08a25a5 in QObject::event(QEvent*)
(this=this@entry=0x561e29eff350, e=e@entry=0x561e22f6d600) at
kernel/qobject.cpp:1326
#45 0x00007f34e47ca4db in QQuickItem::event(QEvent*) (this=0x561e29eff350,
ev=0x561e22f6d600) at items/qquickitem.cpp:8162
#46 0x00007f34e1bb39ac in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=this@entry=0x561e1f547b40, receiver=receiver@entry=0x561e29eff350,
e=e@entry=0x561e22f6d600) at kernel/qapplication.cpp:3685
#47 0x00007f34e1bbabb0 in QApplication::notify(QObject*, QEvent*)
(this=0x7ffebc477c10, receiver=0x561e29eff350, e=0x561e22f6d600) at
kernel/qapplication.cpp:3431
#48 0x00007f34e086f4a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x561e29eff350, event=0x561e22f6d600) at
kernel/qcoreapplication.cpp:1075
#49 0x00007f34e086f67e in QCoreApplication::sendEvent(QObject*, QEvent*)
(receiver=receiver@entry=0x561e29eff350, event=event@entry=0x561e22f6d600) at
kernel/qcoreapplication.cpp:1470
#50 0x00007f34e0872121 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0,
data=0x561e1f53cb00) at kernel/qcoreapplication.cpp:1815
#51 0x00007f34e08726b8 in QCoreApplication::sendPostedEvents(QObject*, int)
(receiver=receiver@entry=0x0, event_type=event_type@entry=0) at
kernel/qcoreapplication.cpp:1674
#52 0x00007f34e08cf103 in postEventSourceDispatch(GSource*, GSourceFunc,
gpointer) (s=0x561e1f580a90) at kernel/qeventdispatcher_glib.cpp:277
#53 0x00007f34d9ab4417 in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007f34d9ab4650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007f34d9ab46dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#56 0x00007f34e08ce7ac in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x561e1f5686c0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#57 0x00007f34e086dd2a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7ffebc477aa0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:225
#58 0x00007f34e08774a0 in QCoreApplication::exec() () at
kernel/qcoreapplication.cpp:1383
#59 0x0000561e1ea360ca in main(int, char**) (argc=<optimized out>,
argv=<optimized out>) at ./shell/main.cpp:222

Possible duplicates by query: bug 421085.

Reported using DrKonqi

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