[dolphin] [Bug 449248] dolphin crashed after phone (mtp) got disconnected

[kavol]

https://bugs.kde.org/show_bug.cgi?id=449248

--- Comment #1 from kavol <kavol at seznam.cz> ---
Created attachment 145990
  --> https://bugs.kde.org/attachment.cgi?id=145990&action=edit
New crash information added by DrKonqi

dolphin (21.08.3) using Qt 5.15.2

- What I was doing when the application crashed:
Similar as before, file transfer got stuck.
Then I got a message that the phone got disconnected.
Dolphin crashed afterwards.

-- Backtrace (Reduced):
#6  0x00007fdf02e573c2 in QWidget::setParent (this=this at entry=0x55b35446b360,
parent=parent at entry=0x55b3549dbf10, f=...) at kernel/qwidget.cpp:10401
#7  0x00007fdf02e5777e in QWidgetPrivate::init (this=0x55b353c78080,
parentWidget=<optimized out>, f=...) at kernel/qwidget.cpp:1044
#8  0x00007fdf03022993 in QDialog::QDialog (this=this at entry=0x55b35446b360,
parent=parent at entry=0x55b3549dbf10, f=..., f at entry=...) at
dialogs/qdialog.cpp:400
#9  0x00007fdf036e98a0 in KMessageBox::messageBox (parent=0x55b3549dbf10,
type=KMessageBox::Error, text=..., caption=..., buttonYes=..., buttonNo=...,
buttonCancel=..., dontShow=..., options=...) at
/usr/src/debug/kf5-kwidgetsaddons-5.89.0-1.fc35.x86_64/src/kmessagebox.cpp:1033
#10 0x00007fdf03d41023 in KDialogJobUiDelegatePrivate::next
(this=0x55b3540fc5e0) at
/usr/src/debug/kf5-kjobwidgets-5.89.0-1.fc35.x86_64/src/kdialogjobuidelegate.cpp:73

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