Details
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Bug
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Resolution: Unresolved
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P4: Low
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None
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5.15.2
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None
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Fedora 33 Gnome
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Linux/X11
Description
If you create and destroy a QApplication object then the file dialog will freeze the application when you try to close it. I'm able to reproduce this on a brand new Fedora 33 install, but it works fine on Windows and Ubuntu. Removing the first QApplication fixes the bug too.
>~"#0 0x00007ffff68a9a0f in poll () from /usr/lib64/libc.so.6\n" >~"#1 0x00007ffff5fc3b1e in g_main_context_iterate.constprop () from /usr/lib64/libglib-2.0.so.0\n" >~"#2 0x00007ffff5f7041f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0\n" >~"#3 0x00007ffff70416f3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5\n" >~"#4 0x00007ffff6ff357b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5\n" >~"#5 0x00007fffe5af43ba in QXdgDesktopPortalFileDialog::exec() () from /usr/lib64/qt5/plugins/platformthemes/libqgnomeplatform.so\n" >~"#6 0x00007ffff7c89ed1 in QDialog::exec() () from /usr/lib64/libQt5Widgets.so.5\n" >~"#7 0x00007ffff7c9c75d in QFileDialog::getOpenFileUrl(QWidget*, QString const&, QUrl const&, QString const&, QString*, QFlags<QFileDialog::Option>, QStringList const&) () from /usr/lib64/libQt5Widgets.so.5\n" >~"#8 0x00007ffff7c9c82c in QFileDialog::getOpenFileName(QWidget*, QString const&, QString const&, QString const&, QString*, QFlags<QFileDialog::Option>) () from /usr/lib64/libQt5Widgets.so.5\n"
Sample code (just click on the button and then try to close the dialog):
#include <QApplication> #include <QPushButton> #include <QFileDialog> int main(int argc, char *argv[]) { { QApplication a(argc, argv); } QApplication a(argc, argv); QMainWindow w; w.show(); QPushButton* b = new QPushButton; w.setCentralWidget(b); QObject::connect(b, &QPushButton::clicked, []{ QFileDialog::getOpenFileName(); }); return a.exec(); }