Application: kgpg (17.12.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-45-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Changing the level of trust of one of my keys to the highest one.

- Unusual behavior I noticed:
After clicking in Apply or Ok buttons, Kgpg enters in an endless loop and doesn't respond to any command any more.
If I click the Cancel button, Kgpg crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: KGpg (kgpg), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc0c895e800 (LWP 23945))]

Thread 5 (Thread 0x7fc0974e1700 (LWP 23958)):
#0  0x00007fc0bbe2b064 in g_mutex_unlock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fc0bbde4d39 in g_main_context_query () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bbde54b7 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0bbde564c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0c2f5690b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc0c2efb9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc0c2d1a22a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc0c2d1f16d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc0be1306db in start_thread (arg=0x7fc0974e1700) at pthread_create.c:463
#9  0x00007fc0c240288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc098563700 (LWP 23957)):
#0  0x00007fc0be1369f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5560c7e50aa8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5560c7e50a58, cond=0x5560c7e50a80) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5560c7e50a80, mutex=0x5560c7e50a58) at pthread_cond_wait.c:655
#3  0x00007fc0a1e1746b in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007fc0a1e17197 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007fc0be1306db in start_thread (arg=0x7fc098563700) at pthread_create.c:463
#6  0x00007fc0c240288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc0a3fff700 (LWP 23956)):
#0  0x00007fc0be1369f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5560c7d33dc0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5560c7d33d70, cond=0x5560c7d33d98) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5560c7d33d98, mutex=0x5560c7d33d70) at pthread_cond_wait.c:655
#3  0x00007fc0c2d2059b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc0c2d18c0b in QSemaphore::acquire(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc0a991780c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007fc0c2d1f16d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc0be1306db in start_thread (arg=0x7fc0a3fff700) at pthread_create.c:463
#8  0x00007fc0c240288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc0aad2c700 (LWP 23949)):
#0  0x00007fc0c23f10b4 in __GI___libc_read (fd=7, buf=0x7fc0aad2bb60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc0bbe29cd0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bbde5027 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0bbde54e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0bbde564c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc0c2f5690b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc0c2efb9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc0c2d1a22a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc0c362ed45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fc0c2d1f16d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc0be1306db in start_thread (arg=0x7fc0aad2c700) at pthread_create.c:463
#11 0x00007fc0c240288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc0c895e800 (LWP 23945)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007fc0c2321801 in __GI_abort () at abort.c:79
#8  0x00007fc0c29768b7 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007fc0c297ca06 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007fc0c297ca41 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007fc0c297d80f in __cxa_pure_virtual () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#12 0x00005560c616cee7 in KGpgTransactionPrivate::slotReadReady (this=0x7fc0ac00ce60) at ./transactions/kgpgtransactionprivate.cpp:194
#13 0x00007fc0c2f2c6cf in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fc0c2f2c6cf in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00005560c61c1ca9 in KLineBufferedProcessPrivate::_k_receivedStdout (this=0x5560c810b4b0) at ./klinebufferedprocessprivate.cpp:40
#16 0x00007fc0c2f2c6cf in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fc0c2e7837a in QProcess::readyReadStandardOutput(QProcess::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fc0c2e7ed69 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fc0c2e83f88 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fc0c2e79aab in QProcess::waitForFinished(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fc0c2e7a22a in QProcess::~QProcess() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00005560c61beb0f in GPGProc::~GPGProc (this=0x5560c810b450, __in_chrg=<optimized out>) at ./gpgproc.cpp:177
#23 GPGProc::~GPGProc (this=0x5560c810b450, __in_chrg=<optimized out>) at ./gpgproc.cpp:179
#24 0x00005560c616ba75 in KGpgTransactionPrivate::~KGpgTransactionPrivate (this=0x7fc0ac00ce60, __in_chrg=<optimized out>) at ./transactions/kgpgtransactionprivate.cpp:55
#25 0x00005560c616bb09 in KGpgTransactionPrivate::~KGpgTransactionPrivate (this=0x7fc0ac00ce60, __in_chrg=<optimized out>) at ./transactions/kgpgtransactionprivate.cpp:56
#26 0x00005560c6167fa1 in KGpgTransaction::~KGpgTransaction (this=0x5560c804b110, __in_chrg=<optimized out>) at ./transactions/kgpgtransaction.cpp:40
#27 0x00005560c616f267 in KGpgChangeTrust::~KGpgChangeTrust (this=0x5560c804b110, __in_chrg=<optimized out>) at ./transactions/kgpgchangetrust.cpp:22
#28 KGpgChangeTrust::~KGpgChangeTrust (this=0x5560c804b110, __in_chrg=<optimized out>) at ./transactions/kgpgchangetrust.cpp:24
#29 0x00007fc0c2f2a19b in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fc0c419ad4c in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00005560c61c9b02 in KgpgKeyInfo::~KgpgKeyInfo (this=0x5560c7be3170, __in_chrg=<optimized out>) at ./keyinfodialog.cpp:160
#32 0x00005560c61c9b39 in KgpgKeyInfo::~KgpgKeyInfo (this=0x5560c7be3170, __in_chrg=<optimized out>) at ./keyinfodialog.cpp:170
#33 0x00005560c61a0f0c in KeysManager::showProperties (this=0x5560c7c35db0, n=<optimized out>) at ./keysmanager.cpp:1646
#34 0x00007fc0c2f2c6cf in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fc0c43a7bf5 in QAbstractItemView::doubleClicked(QModelIndex const&) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007fc0c441a45b in QTreeView::mouseDoubleClickEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007fc0c419f94f in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007fc0c42404be in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007fc0c43b3b3b in QAbstractItemView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007fc0c441c4dc in QTreeView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007fc0c2efd68c in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007fc0c4160805 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#43 0x00007fc0c416864f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#44 0x00007fc0c2efd9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007fc0c4167622 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007fc0c41ba14b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007fc0c41bc7ba in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007fc0c416082c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007fc0c41680f4 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007fc0c2efd9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x00007fc0c39a46c0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#52 0x00007fc0c39a5ff5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#53 0x00007fc0c397d2eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#54 0x00007fc0b521b1c0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#55 0x00007fc0bbde5387 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#56 0x00007fc0bbde55c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#57 0x00007fc0bbde564c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#58 0x00007fc0c2f568ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#59 0x00007fc0c2efb9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007fc0c2f04a84 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#61 0x00005560c61412d4 in main (argc=<optimized out>, argv=<optimized out>) at ./main.cpp:83

Reported using DrKonqi