| Summary: | krunner crashes when KBookmarkManager encounters an error due to GUI code in threads | ||
|---|---|---|---|
| Product: | [Plasma] krunner | Reporter: | George Kiagiadakis <mail> |
| Component: | general | Assignee: | Plasma Bugs List <plasma-bugs> |
| Status: | RESOLVED FIXED | ||
| Severity: | crash | ||
| Priority: | NOR | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Debian testing | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
SVN commit 1204453 by mfuchs: Adds method to KBookmarkManager disable showing dialogs on errors. An "error" signal is emitted in any case. BUG:207592 CCMAIL:dfaure@kde.org M +22 -5 kbookmarkmanager.cc M +32 -0 kbookmarkmanager.h WebSVN link: http://websvn.kde.org/?view=rev&revision=1204453 |
Version: (using KDE 4.3.1) OS: Linux Installed from: Debian testing/unstable Packages Hi, I had some trouble with my ~/.kde and KBookmarkManager could not read its bookmarks.xml file from~/.kde/share/apps/konqueror. Apparently, KBookmarkManager shows a KMessageBox to inform the user when this happens, but krunner is running this code from a thread different than the main thread, which causes a crash. The first backtrace I got was: (I'm not pasting the other threads, they don't make much sense) Thread 2 (Thread 0xa7dfdb90 (LWP 6221)): [KCrash Handler] #6 0xb6b0a046 in ?? () from /usr/lib/libQtDBus.so.4 #7 0xb6b0a9d8 in ?? () from /usr/lib/libQtDBus.so.4 #8 0xb69e9b33 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4 #9 0xb69e9f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4 #10 0xb69e9feb in QObject::destroyed(QObject*) () from /usr/lib/libQtCore.so.4 #11 0xb69eadf9 in QObject::~QObject() () from /usr/lib/libQtCore.so.4 #12 0xb663be3d in KIO::Scheduler::~Scheduler() () from /usr/lib/libkio.so.5 #13 0xb663f131 in ?? () from /usr/lib/libkio.so.5 #14 0xb65748db in ?? () from /usr/lib/libkio.so.5 #15 0xb7ed1589 in exit () from /lib/i686/cmov/libc.so.6 #16 0xb6f1fdab in ?? () from /usr/lib/libQtGui.so.4 #17 0xb7a83e5a in KApplication::xioErrhandler(_XDisplay*) () from /usr/lib/libkdeui.so.5 #18 0xb7a83e96 in ?? () from /usr/lib/libkdeui.so.5 #19 0xb778b2b6 in _XIOError () from /usr/X11R6/lib/libX11.so.6 #20 0xb7792f4f in _XReply () from /usr/X11R6/lib/libX11.so.6 #21 0xb7788361 in XTranslateCoordinates () from /usr/X11R6/lib/libX11.so.6 #22 0xb6f4d0c0 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4 #23 0xb6f4d111 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4 #24 0xb6f4d111 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4 #25 0xb6f4d111 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4 #26 0xb6f4d111 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4 #27 0xb6ec3bb7 in QApplicationPrivate::dispatchEnterLeave(QWidget*, QWidget*) () from /usr/lib/libQtGui.so.4 #28 0xb6f20ca1 in QApplicationPrivate::enterModal_sys(QWidget*) () from /usr/lib/libQtGui.so.4 #29 0xb6ec2d4e in QApplicationPrivate::enterModal(QWidget*) () from /usr/lib/libQtGui.so.4 #30 0xb6f17d2d in QWidgetPrivate::show_helper() () from /usr/lib/libQtGui.so.4 #31 0xb6f1822b in QWidget::setVisible(bool) () from /usr/lib/libQtGui.so.4 #32 0xb73a201d in QDialog::setVisible(bool) () from /usr/lib/libQtGui.so.4 #33 0xb73a1136 in QDialog::exec() () from /usr/lib/libQtGui.so.4 #34 0xb7a0077c in KMessageBox::createKMessageBox(KDialog*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) () from /usr/lib/libkdeui.so.5 #35 0xb7a01a91 in KMessageBox::createKMessageBox(KDialog*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) () from /usr/lib/libkdeui.so.5 #36 0xb7a02883 in KMessageBox::errorListWId(unsigned long, QString const&, QStringList const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5 #37 0xb7a02aa1 in KMessageBox::error(QWidget*, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5 #38 0xb6678b63 in KBookmarkManager::saveAs(QString const&, bool) const () from /usr/lib/libkio.so.5 #39 0xb6678cef in KBookmarkManager::save(bool) const () from /usr/lib/libkio.so.5 #40 0xb6676b16 in KBookmarkManager::parse() const () from /usr/lib/libkio.so.5 #41 0xb6677271 in KBookmarkManager::internalDocument() const () from /usr/lib/libkio.so.5 #42 0xb66772cf in KBookmarkManager::root() const () from /usr/lib/libkio.so.5 #43 0xa9adebb0 in ?? () from /usr/lib/kde4/krunner_bookmarksrunner.so #44 0xb7caf797 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () from /usr/lib/libplasma.so.3 #45 0xb7d252cb in ?? () from /usr/lib/libplasma.so.3 #46 0xb55f24f4 in ?? () from /usr/lib/libthreadweaver.so.4 #47 0xb55f2871 in ThreadWeaver::Job::execute(ThreadWeaver::Thread*) () from /usr/lib/libthreadweaver.so.4 #48 0xb55f148a in ?? () from /usr/lib/libthreadweaver.so.4 #49 0xb55f1afb in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4 #50 0xb68e3582 in ?? () from /usr/lib/libQtCore.so.4 #51 0xb51434b5 in start_thread () from /lib/i686/cmov/libpthread.so.0 #52 0xb7f82a5e in clone () from /lib/i686/cmov/libc.so.6 Fortunately some global KIO destructor crashed as well there, which allowed me to have this backtrace from drkonqi. Because this backtrace doesn't have enough debug symbols, I tried to reproduce again and I got this from gdb directly: Thread 3 (Thread 0xa85feb90 (LWP 8177)): #0 0xb80d9424 in __kernel_vsyscall () #1 0xb7fe7467 in poll () from /lib/i686/cmov/libc.so.6 ---Type <return> to continue, or q <return> to quit--- #2 0xb520fc8b in g_poll () from /usr/lib/libglib-2.0.so.0 #3 0xb52028e5 in ?? () from /usr/lib/libglib-2.0.so.0 #4 0xb5202b98 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #5 0xb6a6e858 in QEventDispatcherGlib::processEvents (this=0x92e2020, flags=...) at kernel/qeventdispatcher_glib.cpp:327 #6 0xb6a4201a in QEventLoop::processEvents (this=0xa85fdb3c, flags=...) at kernel/qeventloop.cpp:149 #7 0xb6a42462 in QEventLoop::exec (this=0xa85fdb3c, flags=...) at kernel/qeventloop.cpp:201 #8 0xb7410193 in QDialog::exec (this=0xa7200738) at dialogs/qdialog.cpp:498 #9 0xb7a6f77c in KMessageBox::createKMessageBox (dialog=0xa7200738, icon=..., text=..., strlist=..., ask=..., checkboxReturn=0x0, options=..., details=..., notifyType=QMessageBox::Critical) at ../../kdeui/dialogs/kmessagebox.cpp:331 #10 0xb7a70a91 in KMessageBox::createKMessageBox (dialog=0xa7200738, icon=QMessageBox::Critical, text=..., strlist=..., ask=..., checkboxReturn=0x0, options=..., details=...) at ../../kdeui/dialogs/kmessagebox.cpp:151 #11 0xb7a71883 in KMessageBox::errorListWId (parent_id=33554473, text=..., strlist=..., caption=..., options=...) at ../../kdeui/dialogs/kmessagebox.cpp:849 #12 0xb7a71aa1 in KMessageBox::error (parent=0x9143d08, text=..., caption=..., options=...) at ../../kdeui/dialogs/kmessagebox.cpp:813 #13 0xb66e7b63 in KBookmarkManager::saveAs (this=0x929c8f8, filename=..., toolbarCache=true) at ../../kio/bookmarks/kbookmarkmanager.cc:419 #14 0xb66e7cef in KBookmarkManager::save (this=0x929c8f8, toolbarCache=<value optimized out>) at ../../kio/bookmarks/kbookmarkmanager.cc:368 #15 0xb66e5b16 in KBookmarkManager::parse (this=0x929c8f8) at ../../kio/bookmarks/kbookmarkmanager.cc:346 #16 0xb66e6271 in KBookmarkManager::internalDocument (this=0x929c8f8) at ../../kio/bookmarks/kbookmarkmanager.cc:306 #17 0xb66e62cf in KBookmarkManager::root (this=0x929c8f8) at ../../kio/bookmarks/kbookmarkmanager.cc:434 #18 0xa9b4dbb0 in BookmarksRunner::match (this=0x929b540, context=...) at ../../../../plasma/runners/bookmarks/bookmarksrunner.cpp:57 #19 0xb7d1e797 in Plasma::AbstractRunner::performMatch (this=0x929b540, localContext=...) at ../../plasma/abstractrunner.cpp:160 #20 0xb7d942cb in Plasma::FindMatchesJob::run (this=0x9303698) at ../../plasma/private/runnerjobs.cpp:158 ---Type <return> to continue, or q <return> to quit--- #21 0xb56614f4 in ThreadWeaver::JobRunHelper::runTheJob (this=0xa85fe2c8, th=0x9341578, job=0x9303698) at ../../../threadweaver/Weaver/Job.cpp:106 #22 0xb5661871 in ThreadWeaver::Job::execute (this=0x9303698, th=0x9341578) at ../../../threadweaver/Weaver/Job.cpp:135 #23 0xb566048a in ThreadWeaver::ThreadRunHelper::run (this=0xa85fe330, parent=0x91439e0, th=0x9341578) at ../../../threadweaver/Weaver/Thread.cpp:95 #24 0xb5660afb in ThreadWeaver::Thread::run (this=0x9341578) at ../../../threadweaver/Weaver/Thread.cpp:142 #25 0xb6952582 in QThreadPrivate::start (arg=0x9341578) at thread/qthread_unix.cpp:188 #26 0xb51b24b5 in start_thread () from /lib/i686/cmov/libpthread.so.0 #27 0xb7ff1a5e in clone () from /lib/i686/cmov/libc.so.6 (In this backtrace it has succeeded in showing the messagebox from thread 3 and it is in a deadlocked state.)