1. install krita 4.4 beta from the flathub-beta repro 2. create new file 3. try to save file Thread 1 "krita" received signal SIGSEGV, Segmentation fault. QString::QString (other=..., this=0x555560334a00) at ../../../../include/QtCore/../../src/corelib/text/qstring.h:1089 1089 ../../../../include/QtCore/../../src/corelib/text/qstring.h: No such file or directory. (gdb) bt #0 QString::QString (other=..., this=0x555560334a00) at ../../../../include/QtCore/../../src/corelib/text/qstring.h:1089 #1 QXdgDesktopPortalFileDialog::Filter::Filter (this=0x555560334a00) at qxdgdesktopportalfiledialog_p.h:66 #2 QtMetaTypePrivate::QMetaTypeFunctionHelper<QXdgDesktopPortalFileDialog::Filter, true>::Construct (where=0x555560334a00, t=0x5555621cba48) at ../../../../include/QtCore/../../src/corelib/kernel/qmetatype.h:825 #3 0x00007ffff4a620ce in QMetaType::construct (copy=0x5555621cba48, where=0x555560334a00, this=0x7fffffffc620) at ../../include/QtCore/../../src/corelib/kernel/qmetatype.h:2366 #4 (anonymous namespace)::customConstruct (d=0x7fffffffc7b0, copy=0x5555621cba48) at kernel/qvariant.cpp:1478 #5 0x00007ffff4a623dd in QVariant::QVariant (this=0x7fffffffc7b0, typeId=<optimized out>, copy=<optimized out>, flags=<optimized out>) at kernel/qvariant.cpp:2144 #6 0x00007fffef80e95c in QVariant::fromValue<QXdgDesktopPortalFileDialog::Filter> (value=...) at qxdgdesktopportalfiledialog_p.h:104 #7 QXdgDesktopPortalFileDialog::openPortal (this=this@entry=0x5555622d4b60) at qxdgdesktopportalfiledialog.cpp:277 #8 0x00007fffef80f3cd in QXdgDesktopPortalFileDialog::show (this=0x5555622d4b60, windowFlags=..., windowModality=Qt::WindowModal, parent=0x55555f8efef0) at qxdgdesktopportalfiledialog.cpp:434 #9 0x00007ffff57e69e7 in QDialogPrivate::setNativeDialogVisible (this=this@entry=0x555560946840, visible=visible@entry=true) at ../../include/QtWidgets/../../src/widgets/kernel/qwidget.h:771 #10 0x00007ffff57f925e in QFileDialog::setVisible (this=0x555564c6bf10, visible=<optimized out>) at dialogs/qfiledialog.cpp:882 #11 0x00007ffff57e7be0 in QDialog::exec (this=0x555564c6bf10) at dialogs/qdialog.cpp:593 #12 0x00007ffff5c41e19 in KoFileDialog::filename (this=this@entry=0x7fffffffcaf0) at /usr/include/QtCore/qscopedpointer.h:116 #13 0x00007ffff710ed9f in KisMainWindow::saveDocument (this=0x555557207430, document=0x5555621af2c0, saveas=<optimized out>, isExporting=false) at ../libs/ui/KisMainWindow.cpp:1281 #14 0x00007ffff7110544 in KisMainWindow::slotFileSave (this=0x555557207430) at /usr/include/c++/10.2.0/bits/atomic_base.h:420 #15 0x00007ffff4a595f0 in doActivate<false> (sender=0x555561bc97c0, signal_index=4, argv=argv@entry=0x7fffffffccc0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395 #16 0x00007ffff4a52910 in QMetaObject::activate (sender=sender@entry=0x555561bc97c0, m=m@entry=0x7ffff5ae6d20 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffffffccc0) at kernel/qobject.cpp:3946 #17 0x00007ffff55e8b52 in QAction::triggered (this=this@entry=0x555561bc97c0, _t1=<optimized out>) at .moc/moc_qaction.cpp:376 #18 0x00007ffff55eb391 in QAction::activate (this=0x555561bc97c0, event=<optimized out>) at kernel/qaction.cpp:1161 #19 0x00007ffff56dde42 in QAbstractButtonPrivate::click (this=this@entry=0x555561d7fbc0) at widgets/qabstractbutton.cpp:941 #20 0x00007ffff56ddf61 in QAbstractButton::mouseReleaseEvent (this=0x555561d7f7a0, e=0x7fffffffd320) at widgets/qabstractbutton.cpp:1044 #21 0x00007ffff57cd76a in QToolButton::mouseReleaseEvent (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:622 #22 0x00007ffff562ef8e in QWidget::event (this=0x555561d7f7a0, event=0x7fffffffd320) at kernel/qwidget.cpp:9019 #23 0x00007ffff55ef14f in QApplicationPrivate::notify_helper (this=this@entry=0x55555706a2a0, receiver=receiver@entry=0x555561d7f7a0, e=e@entry=0x7fffffffd320) at kernel/qapplication.cpp:3630 #24 0x00007ffff55f603b in QApplication::notify (this=0x7fffffffcfa0, receiver=receiver@entry=0x555561d7f7a0, e=e@entry=0x7fffffffd320) at kernel/qapplication.cpp:3074 #25 0x00007ffff70d90ed in KisApplication::notify (this=<optimized out>, receiver=0x555561d7f7a0, event=0x7fffffffd320) at ../libs/ui/KisApplication.cpp:688 #26 0x00007ffff4a22fda in QCoreApplication::notifyInternal2 (receiver=0x555561d7f7a0, event=0x7fffffffd320) at ../../include/QtCore/5.15.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325 #27 0x00007ffff55f5066 in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x555561d7f7a0, event=event@entry=0x7fffffffd320, alienWidget=alienWidget@entry=0x555561d7f7a0, nativeWidget=0x555557207430, buttonDown=buttonDown@entry=0x7ffff5b159f0 <qt_button_down>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2614 #28 0x00007ffff5646fd1 in QWidgetWindow::handleMouseEvent (this=0x55555f8efef0, event=0x7fffffffd660) at /usr/include/c++/10.2.0/bits/atomic_base.h:420 #29 0x00007ffff564a2fe in QWidgetWindow::event (this=0x55555f8efef0, event=0x7fffffffd660) at kernel/qwidgetwindow.cpp:300 #30 0x00007ffff55ef14f in QApplicationPrivate::notify_helper (this=this@entry=0x55555706a2a0, receiver=receiver@entry=0x55555f8efef0, e=e@entry=0x7fffffffd660) at kernel/qapplication.cpp:3630 #31 0x00007ffff55f5d58 in QApplication::notify (this=<optimized out>, receiver=receiver@entry=0x55555f8efef0, e=e@entry=0x7fffffffd660) at kernel/qapplication.cpp:3376 #32 0x00007ffff70d90ed in KisApplication::notify (this=<optimized out>, receiver=0x55555f8efef0, event=0x7fffffffd660) at ../libs/ui/KisApplication.cpp:688 #33 0x00007ffff4a22fda in QCoreApplication::notifyInternal2 (receiver=0x55555f8efef0, event=0x7fffffffd660) at ../../include/QtCore/5.15.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325 #34 0x00007ffff4ede39b in QGuiApplicationPrivate::processMouseEvent (e=0x5555621bfda0) at kernel/qguiapplication.cpp:2270 #35 0x00007ffff4eb455b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1175 #36 0x00007fffef7292ea in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105 #37 0x00007ffff054b87b in g_main_dispatch (context=0x7fffe8005000) at ../glib/gmain.c:3309 #38 g_main_context_dispatch (context=0x7fffe8005000) at ../glib/gmain.c:3974 #39 0x00007ffff054bb28 in g_main_context_iterate (context=context@entry=0x7fffe8005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4047 #40 0x00007ffff054bbf3 in g_main_context_iteration (context=0x7fffe8005000, may_block=may_block@entry=1) at ../glib/gmain.c:4108 #41 0x00007ffff4a7a52f in QEventDispatcherGlib::processEvents (this=0x5555573f35e0, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #42 0x00007ffff4a2199b in QEventLoop::exec (this=this@entry=0x7fffffffd990, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141 #43 0x00007ffff4a29c10 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121 #44 0x0000555555e28f5f in main (argc=<optimized out>, argv=0x7fffffffdcc8) at ../krita/main.cc:620
Looks like a recent change in Qt is causing this crash: https://codereview.qt-project.org/c/qt/qtbase/+/308145 I notified the author of the change and if he doesn't respond, I will try to investigate or temporarily revert it.
(In reply to Jan Grulich from comment #1) > Looks like a recent change in Qt is causing this crash: > https://codereview.qt-project.org/c/qt/qtbase/+/308145 > > I notified the author of the change and if he doesn't respond, I will try to > investigate or temporarily revert it. Probably the same issue as reported in https://bugreports.qt.io/browse/QTBUG-87143, which includes a small sample program . I hope I'll be able to take a look today or tomorrow.
Thankfully, Giuseppe D'Angelo has already submitted a patch to Qt's Gerrit: https://codereview.qt-project.org/c/qt/qtbase/+/316248
KDE runtime fix: https://invent.kde.org/packaging/flatpak-kde-runtime/-/merge_requests/27
It no longer crashes with the updated runtime, however there is still this issue that the saving dialog freezes whole application upon confirmation.
(In reply to Jan Grulich from comment #5) > It no longer crashes with the updated runtime, however there is still this > issue that the saving dialog freezes whole application upon confirmation. Is this also related to https://codereview.qt-project.org/c/qt/qtbase/+/308145 or a different issue?
(In reply to Michael Weghorn from comment #6) > (In reply to Jan Grulich from comment #5) > > It no longer crashes with the updated runtime, however there is still this > > issue that the saving dialog freezes whole application upon confirmation. > > Is this also related to > https://codereview.qt-project.org/c/qt/qtbase/+/308145 or a different issue? Completely different issue: https://bugs.kde.org/show_bug.cgi?id=408341
It should be fixed with the updated runtime or with updated Krita if they backport the fix to their bundled Qt.