Bug 403291

Application: ksysguard (5.14.4)

Qt Version: 5.11.3
Frameworks Version: 5.53.0
Operating System: Linux 4.19.13-300.fc29.x86_64 x86_64
Distribution: "Fedora release 29 (Twenty Nine)"

-- Information about the crash:
Just opened Ksysguard, closed it after a few seconds and it crashed.
Tried again and crashed again. But subsequent trials went fine without crash.

The crash can be reproduced sometimes.

-- Backtrace:
Application: System Monitor (ksysguard), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd19dfcb940 (LWP 7353))]

Thread 5 (Thread 0x7fd187fff700 (LWP 7358)):
#0  0x00007fd1a21f673c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fd18cedf4e3 in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007fd18cedf23b in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007fd1a21f058e in start_thread () at /lib64/libpthread.so.0
#4  0x00007fd1a54146a3 in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fd18f599700 (LWP 7356)):
#0  0x00007fd1a5404f84 in read () at /lib64/libc.so.6
#1  0x00007fd19fabce90 in  () at /lib64/libglib-2.0.so.0
#2  0x00007fd19fa75e9b in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007fd19fa76350 in  () at /lib64/libglib-2.0.so.0
#4  0x00007fd19fa764d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007fd1a5ab85ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fd1a5a66e0b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007fd1a58cee86 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007fd1a696af89 in  () at /lib64/libQt5DBus.so.5
#9  0x00007fd1a58d82fb in  () at /lib64/libQt5Core.so.5
#10 0x00007fd1a21f058e in start_thread () at /lib64/libpthread.so.0
#11 0x00007fd1a54146a3 in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fd190327700 (LWP 7355)):
#0  0x00007fd1a5409421 in poll () at /lib64/libc.so.6
#1  0x00007fd1a1c4339f in  () at /lib64/libxcb.so.1
#2  0x00007fd1a1c4501a in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007fd19d66bbf9 in  () at /lib64/libQt5XcbQpa.so.5
#4  0x00007fd1a58d82fb in  () at /lib64/libQt5Core.so.5
#5  0x00007fd1a21f058e in start_thread () at /lib64/libpthread.so.0
#6  0x00007fd1a54146a3 in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fd19dfc7700 (LWP 7354)):
#0  0x00007fd1a21f673c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fd1a573b690 in std::condition_variable::wait(std::unique_lock<std::mutex>&) () at /lib64/libstdc++.so.6
#2  0x00007fd1a460497a in  () at /lib64/libQt5WebKit.so.5
#3  0x00007fd1a4604aaf in  () at /lib64/libQt5WebKit.so.5
#4  0x00007fd1a5741943 in  () at /lib64/libstdc++.so.6
#5  0x00007fd1a21f058e in start_thread () at /lib64/libpthread.so.0
#6  0x00007fd1a54146a3 in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fd19dfcb940 (LWP 7353)):
[KCrash Handler]
#6  0x00007fd1a64840c0 in  () at /lib64/libQt5Widgets.so.5
#7  0x00007fd1a6484c24 in QLabel::setText(QString const&) () at /lib64/libQt5Widgets.so.5
#8  0x00007fd1a7827374 in  () at /lib64/libkdeinit5_ksysguard.so
#9  0x00007fd1a6f86709 in KSGRD::SensorAgent::processAnswer(char const*, int) () at /lib64/libksgrd.so.7
#10 0x00007fd1a6f8dbb2 in  () at /lib64/libksgrd.so.7
#11 0x00007fd1a5a901c3 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#12 0x00007fd1a5a0925e in QProcess::readyReadStandardOutput(QProcess::QPrivateSignal) () at /lib64/libQt5Core.so.5
#13 0x00007fd1a5a0e0d1 in  () at /lib64/libQt5Core.so.5
#14 0x00007fd1a5a0e4d0 in  () at /lib64/libQt5Core.so.5
#15 0x00007fd1a5a9009e in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#16 0x00007fd1a5a9b95c in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () at /lib64/libQt5Core.so.5
#17 0x00007fd1a5a9bcc1 in QSocketNotifier::event(QEvent*) () at /lib64/libQt5Core.so.5
#18 0x00007fd1a6357285 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#19 0x00007fd1a635e9a0 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#20 0x00007fd1a5a67ec6 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#21 0x00007fd1a5ab8f4c in  () at /lib64/libQt5Core.so.5
#22 0x00007fd19fa7606d in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#23 0x00007fd19fa76438 in  () at /lib64/libglib-2.0.so.0
#24 0x00007fd19fa764d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#25 0x00007fd1a5ab8593 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#26 0x00007fd19d6ff855 in  () at /lib64/libQt5XcbQpa.so.5
#27 0x00007fd1a5a66e0b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#28 0x00007fd1a5a6eed6 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#29 0x00007fd1a78290ef in kdemain () at /lib64/libkdeinit5_ksysguard.so
#30 0x00007fd1a533b413 in __libc_start_main () at /lib64/libc.so.6
#31 0x00005578569bc0ae in _start ()
[Inferior 1 (process 7353) detached]

Reported using DrKonqi