Bug 420952

Application: ksysguard (5.16.5)

Qt Version: 5.12.4
Frameworks Version: 5.62.0
Operating System: Linux 5.3.0-48-generic x86_64
Distribution: Ubuntu 19.10

-- Information about the crash:
- What I was doing when the application crashed:

After searching for a process by name, I quit the KSysGuard application and the crash report wizard appeared.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Surveillance du système (ksysguard), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff2f5b07f00 (LWP 21766))]

Thread 4 (Thread 0x7ff2f0b25700 (LWP 21775)):
#0  0x00007ff3092ff2ac in __GI___libc_read (nbytes=16, buf=0x7ff2f0b24460, fd=8) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007ff3092ff2ac in __GI___libc_read (fd=8, buf=0x7ff2f0b24460, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007ff2ff6fd70f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff2ff6b55fe in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff2ff6b5a52 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ff2ff6b5be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ff30795d653 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ff3079045cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ff30773da45 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ff307c8befa in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007ff30773ec92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007ff2fff1c669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#12 0x00007ff309310323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7ff2f2806700 (LWP 21774)):
#0  0x00007ff2fff232c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5653c29ddb18) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007ff2fff232c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5653c29ddac8, cond=0x5653c29ddaf0) at pthread_cond_wait.c:508
#2  0x00007ff2fff232c6 in __pthread_cond_wait (cond=0x5653c29ddaf0, mutex=0x5653c29ddac8) at pthread_cond_wait.c:638
#3  0x00007ff2f2ef4aab in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007ff2f2ef46cb in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007ff2fff1c669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007ff309310323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7ff2f476a700 (LWP 21768)):
#0  0x00007ff309303c2f in __GI___poll (fds=0x7ff2f47695a8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ff2fff7f917 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007ff2fff8153a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007ff2f4cb0288 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007ff30773ec92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ff2fff1c669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007ff309310323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ff2f5b07f00 (LWP 21766)):
[KCrash Handler]
#6  0x00007ff30859b810 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007ff30859c384 in QLabel::setText(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007ff309456223 in  () at /usr/lib/x86_64-linux-gnu/libkdeinit5_ksysguard.so
#9  0x00007ff309080378 in KSGRD::SensorAgent::processAnswer(char const*, int) () at /usr/lib/x86_64-linux-gnu/libksgrd.so.7
#10 0x00007ff309087802 in  () at /usr/lib/x86_64-linux-gnu/libksgrd.so.7
#11 0x00007ff307931558 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007ff30788149e in QProcess::readyReadStandardOutput(QProcess::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007ff307887ba9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007ff307887f12 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007ff3079313f8 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007ff30793e0c5 in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007ff30793e421 in QSocketNotifier::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007ff308460a86 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007ff308469e00 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007ff307905a2a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007ff30795e295 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007ff2ff6b58bd in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ff2ff6b5b40 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ff2ff6b5be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ff30795d635 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007ff3079045cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007ff30790c336 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007ff309457fdf in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_ksysguard.so
#29 0x00007ff3092151e3 in __libc_start_main (main=0x5653c09e3060, argc=1, argv=0x7ffc272dfe88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc272dfe78) at ../csu/libc-start.c:308
#30 0x00005653c09e309e in _start ()
[Inferior 1 (process 21766) detached]

Reported using DrKonqi