Application: kate (21.04.1) Qt Version: 5.15.2 Frameworks Version: 5.82.0 Operating System: Linux 5.12.8-300.fc34.x86_64 x86_64 Windowing System: Wayland Drkonqi Version: 5.21.5 Distribution: Fedora 34 (Workstation Edition) -- Information about the crash: - What I was doing when the application crashed: Tried to save a new text file in a directory. A lag of a couple of seconds and then the crash. This was reproducable, but only for that specific directory, which has about 20 PDF files in. Seems related to the thumbnails somehow. When I moved the PDFs into a subdir and out again, forcing the thumbnails to be regenerated, the crash went away. Suggests that it is perhaps related to loading thumbnails in some older thumbnail format? - Custom settings of the application: Generates thumbnails for PDFs and Office files The crash can be reproduced every time. -- Backtrace: Application: Kate (kate), signal: Segmentation fault [KCrash Handler] #4 0x00007fac875bd766 in __memmove_avx_unaligned_erms () from /lib64/libc.so.6 #5 0x00007fac87f4625f in QImage::copy(QRect const&) const () from /lib64/libQt5Gui.so.5 #6 0x00007fac8950e60d in KIO::PreviewJobPrivate::slotThumbData(KIO::Job*, QByteArray const&) () from /lib64/libKF5KIOWidgets.so.5 #7 0x00007fac87af74b0 in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5 #8 0x00007fac8935ac38 in KIO::TransferJob::data(KIO::Job*, QByteArray const&) () from /lib64/libKF5KIOCore.so.5 #9 0x00007fac87af74b0 in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5 #10 0x00007fac8933c926 in KIO::SlaveInterface::data(QByteArray const&) () from /lib64/libKF5KIOCore.so.5 #11 0x00007fac8933c33a in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /lib64/libKF5KIOCore.so.5 #12 0x00007fac8933460d in KIO::SlaveInterface::dispatch() () from /lib64/libKF5KIOCore.so.5 #13 0x00007fac8933dc62 in KIO::Slave::gotInput() () from /lib64/libKF5KIOCore.so.5 #14 0x00007fac87af74b0 in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5 #15 0x00007fac87aee257 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5 #16 0x00007fac8858fe73 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5 #17 0x00007fac87ac6f48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5 #18 0x00007fac87ac9c76 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5 #19 0x00007fac87b13c57 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5Core.so.5 #20 0x00007fac85def4cf in g_main_context_dispatch () from /lib64/libglib-2.0.so.0 #21 0x00007fac85e434e8 in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0 #22 0x00007fac85decc03 in g_main_context_iteration () from /lib64/libglib-2.0.so.0 #23 0x00007fac87b136f8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #24 0x00007fac87ac59b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #25 0x00007fac8878ec87 in QDialog::exec() () from /lib64/libQt5Widgets.so.5 #26 0x00007fac8878ebc7 in QDialog::exec() () from /lib64/libQt5Widgets.so.5 #27 0x00007fac887a1b2d in QFileDialog::getSaveFileUrl(QWidget*, QString const&, QUrl const&, QString const&, QString*, QFlags<QFileDialog::Option>, QStringList const&) () from /lib64/libQt5Widgets.so.5 #28 0x00007fac89723a4d in KTextEditor::DocumentPrivate::documentSaveAs() () from /lib64/libKF5TextEditor.so.5 #29 0x00007fac896aabb5 in KTextEditor::DocumentPrivate::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libKF5TextEditor.so.5 #30 0x00007fac87af74fd in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt5Core.so.5 #31 0x00007fac88589686 in QAction::triggered(bool) () from /lib64/libQt5Widgets.so.5 #32 0x00007fac8858bf70 in QAction::activate(QAction::ActionEvent) () from /lib64/libQt5Widgets.so.5 #33 0x00007fac8858cb4f in QAction::event(QEvent*) () from /lib64/libQt5Widgets.so.5 #34 0x00007fac8858fe73 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5 #35 0x00007fac87ac6f48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5 #36 0x00007fac87f2c102 in QShortcutMap::dispatchEvent(QKeyEvent*) () from /lib64/libQt5Gui.so.5 #37 0x00007fac87f2c613 in QShortcutMap::tryShortcut(QKeyEvent*) () from /lib64/libQt5Gui.so.5 #38 0x00007fac87ee87e7 in QWindowSystemInterface::handleShortcutEvent(QWindow*, unsigned long, int, QFlags<Qt::KeyboardModifier>, unsigned int, unsigned int, unsigned int, QString const&, bool, unsigned short) () from /lib64/libQt5Gui.so.5 #39 0x00007fac87f0015f in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () from /lib64/libQt5Gui.so.5 #40 0x00007fac87ee54fc in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Gui.so.5 #41 0x00007fac85859864 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5WaylandClient.so.5 #42 0x00007fac85def4cf in g_main_context_dispatch () from /lib64/libglib-2.0.so.0 #43 0x00007fac85e434e8 in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0 #44 0x00007fac85decc03 in g_main_context_iteration () from /lib64/libglib-2.0.so.0 #45 0x00007fac87b136f8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #46 0x00007fac87ac59b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #47 0x00007fac87acd544 in QCoreApplication::exec() () from /lib64/libQt5Core.so.5 #48 0x00005573636b04a4 in main () [Inferior 1 (process 4103) detached] Possible duplicates by query: bug 437773, bug 436863, bug 435427, bug 432084, bug 431077. Reported using DrKonqi
Possibly related is a crash in kdeinit5 about the same time (just after the kate crash). I wonder if the syntax highlighting crashes and that breaks a thumbnail? Or maybe the kate crash brings down the syntax highlighting service? Application: kdeinit5 (kdeinit5), signal: Segmentation fault [KCrash Handler] #4 0x00007f891e3d4594 in sljit_free_exec.lto_priv () from /lib64/libpcre2-16.so.0 #5 0x00007f891e3befd6 in pcre2_code_free_16 () from /lib64/libpcre2-16.so.0 #6 0x00007f891fa3b284 in QExplicitlySharedDataPointer<QRegularExpressionPrivate>::~QExplicitlySharedDataPointer() () from /lib64/libQt5Core.so.5 #7 0x00007f890410acfc in KSyntaxHighlighting::RegExpr::~RegExpr() [clone .lto_priv.0] () from /lib64/libKF5SyntaxHighlighting.so.5 #8 0x00007f890410d05e in std::_Sp_counted_ptr<KSyntaxHighlighting::DefinitionData*, (__gnu_cxx::_Lock_policy)2>::_M_dispose() () from /lib64/libKF5SyntaxHighlighting.so.5 #9 0x00007f8904107d92 in KSyntaxHighlighting::Definition::~Definition() () from /lib64/libKF5SyntaxHighlighting.so.5 #10 0x00007f890410e0c2 in QMapNode<QString, KSyntaxHighlighting::Definition>::destroySubTree() () from /lib64/libKF5SyntaxHighlighting.so.5 #11 0x00007f890410e1ba in QMapNode<QString, KSyntaxHighlighting::Definition>::destroySubTree() () from /lib64/libKF5SyntaxHighlighting.so.5 #12 0x00007f890410e512 in KSyntaxHighlighting::Repository::~Repository() () from /lib64/libKF5SyntaxHighlighting.so.5 #13 0x00007f89042cf9e9 in TextCreator::~TextCreator() () from /usr/lib64/qt5/plugins/textthumbnail.so #14 0x00007f8920647d67 in ThumbnailProtocol::~ThumbnailProtocol() () from /usr/lib64/qt5/plugins/kf5/kio/thumbnail.so #15 0x00007f8920649452 in kdemain () from /usr/lib64/qt5/plugins/kf5/kio/thumbnail.so #16 0x00005562c35525ab in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) () #17 0x00005562c3553d4b in handle_launcher_request(int, char const*) [clone .constprop.0] () #18 0x00005562c3554380 in handle_requests(int) () #19 0x00005562c354f0e1 in main () [Inferior 1 (process 5114) detached]
This should be not in kate but the file chooser plugin, I think, but I'm not sure which framework that is under.
Looks for me like some issue in the thumbnail io process.
Looked at the code, that seems fine and can not reproduce, please re-try with a Qt 6 based release.