Comments (5)
tsujan
commented on August 21, 2024
Confirmed (it's a little random). Thanks for reporting!
from libfm-qt.
tsujan
commented on August 21, 2024
Wait a minute! The backtrace I get doesn't have any line about LXQt:
#0 0x00007f3d6c8794f9 in Fm::FileDialog::firstSelectedDir() const () at /usr/lib/libfm-qt.so.3
#1 0x00007f3d6c87c471 in Fm::FileDialog::updateAcceptButtonState() () at /usr/lib/libfm-qt.so.3
#2 0x00007f3d6c87f247 in () at /usr/lib/libfm-qt.so.3
#3 0x00007f3d81487a04 in () at /usr/lib/libQt5Core.so.5
#4 0x00007f3d8147b40b in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#5 0x00007f3d821c4e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#6 0x00007f3d821cc816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#7 0x00007f3d837fdd98 in KisApplication::notify(QObject*, QEvent*) () at /usr/lib/libkritaui.so.18
#8 0x00007f3d8144a1e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#9 0x00007f3d814a5ad8 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#10 0x00007f3d814a62d2 in () at /usr/lib/libQt5Core.so.5
#11 0x00007f3d78c27270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#12 0x00007f3d78c28f69 in () at /usr/lib/libglib-2.0.so.0
#13 0x00007f3d78c28fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#14 0x00007f3d814a6691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#15 0x00007f3d70b5b282 in () at /usr/lib/libQt5XcbQpa.so.5
#16 0x00007f3d8144882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#17 0x00007f3d823bbdcb in QDialog::exec() () at /usr/lib/libQt5Widgets.so.5
#18 0x00007f3d82d91fe9 in KoFileDialog::filename() () at /usr/lib/libkritawidgetutils.so.18
#19 0x00007f3d8383892a in KisMainWindow::saveDocument(KisDocument*, bool, bool, int) ()
at /usr/lib/libkritaui.so.18
#20 0x00007f3d83839d46 in KisMainWindow::slotFileSaveAs() () at /usr/lib/libkritaui.so.18
#21 0x00007f3d8383e707 in () at /usr/lib/libkritaui.so.18
#22 0x00007f3d8147aa06 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#23 0x00007f3d821be383 in QAction::triggered(bool) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007f3d821c0c06 in QAction::activate(QAction::ActionEvent) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007f3d82346c35 in () at /usr/lib/libQt5Widgets.so.5
#26 0x00007f3d8234e2fc in () at /usr/lib/libQt5Widgets.so.5
#27 0x00007f3d8234f164 in QMenu::mouseReleaseEvent(QMouseEvent*) () at /usr/lib/libQt5Widgets.so.5
#28 0x00007f3d82204e38 in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#29 0x00007f3d8235149c in QMenu::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#30 0x00007f3d821c4e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#31 0x00007f3d821ccd91 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#32 0x00007f3d837fdd98 in KisApplication::notify(QObject*, QEvent*) () at /usr/lib/libkritaui.so.18
#33 0x00007f3d8144a1e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#34 0x00007f3d821cbd1a in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib/libQt5Widgets.so.5
#35 0x00007f3d8221ffb7 in () at /usr/lib/libQt5Widgets.so.5
#36 0x00007f3d822229a0 in () at /usr/lib/libQt5Widgets.so.5
#37 0x00007f3d821c4e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#38 0x00007f3d821cc816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#39 0x00007f3d837fdd98 in KisApplication::notify(QObject*, QEvent*) () at /usr/lib/libkritaui.so.18
#40 0x00007f3d8144a1e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#41 0x00007f3d819bb634 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) ()
at /usr/lib/libQt5Gui.so.5
#42 0x00007f3d819bd186 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#43 0x00007f3d81994bbc in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Gui.so.5
#44 0x00007f3d70b5b28d in () at /usr/lib/libQt5XcbQpa.so.5
#45 0x00007f3d8144882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#46 0x00007f3d81451b18 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#47 0x000056290c232e16 in main ()
I use the latest git libfm-qt.
EDIT: I was wrong. It's a bug in libfm-qt.
from libfm-qt.
tsujan
commented on August 21, 2024
Should be fixed by #159 -- I can't reproduce the crash with it, having used "Save As" 5 times.
BTW, Boudewijn Rempt should have said the bug could be avoided by enabling native file dialogs. Anyhow, there will be no difference with the patch.
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comicfans
commented on August 21, 2024
Wow your fix is so fast, so the root cause is that singleShot should use receiver version instead of just functor. nothing to do with mainloop.
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tsujan
commented on August 21, 2024
so the root cause is that singleShot should use receiver version instead of just functor. nothing to do with mainloop.
Sometimes, it's necessary to choose an appropriate object, whose destruction guarantees a lambda disconnection (this -- the dialog -- in this case). singleShot lambdas need that most of the time (but not always).
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