[KPhotoAlbum] Import crash

[Robert Krawitz]

I'm trying to import a huge number of photos (as a way of syncing up
two image stores), and kpa crashed.  "Huge number" in this case means
90,000; I tried a similar exercise with a much smaller number with no
trouble.  I don't have a directly useful stack trace, but it looks
like a stack overflow; the number of stack frames is itself telling.
This is suggesting to me that something in the importer is recursing
when it should be iterating.

I can rebuild with debugging turned on.

#19392 0x00000000005e000f in  ()
#19393 0x00000000005e000f in  ()
#19394 0x00000000005e000f in  ()
#19395 0x00000000005e000f in  ()
#19396 0x00000000005e000f in  ()
#19397 0x00000000005e000f in  ()
#19398 0x00000000005e000f in  ()
#19399 0x00000000005e000f in  ()
#19400 0x00000000005e000f in  ()
#19401 0x00000000005e000f in  ()
#19402 0x00000000005e000f in  ()
#19403 0x00000000005e09fe in  ()
#19404 0x00000000005e199d in  ()
#19405 0x00000000005d3e0e in  ()
#19406 0x00000000005d4119 in  ()
#19407 0x00000000005d4355 in  ()
#19408 0x00007fffef3050d5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#19409 0x00007ffff280fd52 in QAction::triggered(bool) ()
    at /usr/lib64/libQt5Widgets.so.5
#19410 0x00007ffff28124bd in QAction::activate(QAction::ActionEvent) ()
    at /usr/lib64/libQt5Widgets.so.5
#19411 0x00007ffff2972492 in  () at /usr/lib64/libQt5Widgets.so.5
#19412 0x00007ffff2978654 in  () at /usr/lib64/libQt5Widgets.so.5
#19413 0x00007ffff29794ab in QMenu::mouseReleaseEvent(QMouseEvent*) ()
    at /usr/lib64/libQt5Widgets.so.5
#19414 0x00007ffff285a07a in QWidget::event(QEvent*) ()
    at /usr/lib64/libQt5Widgets.so.5
#19415 0x00007ffff297b70b in QMenu::event(QEvent*) ()
    at /usr/lib64/libQt5Widgets.so.5
#19416 0x00007ffff28161bc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#19417 0x00007ffff281d7d5 in QApplication::notify(QObject*, QEvent*) ()
    at /usr/lib64/libQt5Widgets.so.5

#19418 0x00007fffef2dd245 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#19419 0x00007ffff281c5eb in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
    at /usr/lib64/libQt5Widgets.so.5
#19420 0x00007ffff287325c in  () at /usr/lib64/libQt5Widgets.so.5
#19421 0x00007ffff2875a83 in  () at /usr/lib64/libQt5Widgets.so.5
#19422 0x00007ffff28161bc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#19423 0x00007ffff281d0f0 in QApplication::notify(QObject*, QEvent*) ()
    at /usr/lib64/libQt5Widgets.so.5
#19424 0x00007fffef2dd245 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#19425 0x00007fffef82ed1b in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib64/libQt5Gui.so.5
#19426 0x00007fffef830895 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
    at /usr/lib64/libQt5Gui.so.5
#19427 0x00007fffef8103fb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Gui.so.5
---Type <return> to continue, or q <return> to quit---
#19428 0x00007fffde18dda0 in  () at /usr/lib64/libQt5XcbQpa.so.5
#19429 0x00007fffe9497134 in g_main_context_dispatch ()
    at /usr/lib64/libglib-2.0.so.0
#19430 0x00007fffe9497388 in  () at /usr/lib64/libglib-2.0.so.0
#19431 0x00007fffe949742c in g_main_context_iteration ()
    at /usr/lib64/libglib-2.0.so.0
#19432 0x00007fffef32b88c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#19433 0x00007fffef2db6ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#19434 0x00007fffef2e3344 in QCoreApplication::exec() ()
    at /usr/lib64/libQt5Core.so.5
#19435 0x0000000000460367 in  ()
#19436 0x00007fffee4576e5 in __libc_start_main () at /lib64/libc.so.6
#19437 0x0000000000461979 in _start ()
-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

***  MIT Engineers   A Proud Tradition   http://mitathletics.com  ***
Member of the League for Programming Freedom  --  http://ProgFree.org
Project lead for Gutenprint   --    http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton