Application: plasma-discover (5.14.5)

Qt Version: 5.12.0
Frameworks Version: 5.54.0
Operating System: Linux 4.20.6-arch1-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
I just open it and waiting for 5 min, it just crash without any operation.

The crash can be reproduced every time.

-- Backtrace:
Application: 发现者 (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9ea9657080 (LWP 5731))]

Thread 9 (Thread 0x7f9e8cab7700 (LWP 5749)):
#0  0x00007f9eac761f5a in g_main_context_query () at /usr/lib/libglib-2.0.so.0
#1  0x00007f9eac76b4bc in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9eae4da5c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f9eae2c75c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f9e8dff9700 (LWP 5741)):
[KCrash Handler]
#6  0x00007f9ead976904 in  () at /usr/lib/libQt5Network.so.5
#7  0x00007f9ead9751fb in  () at /usr/lib/libQt5Network.so.5
#8  0x00007f9eae4afb62 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#9  0x00007f9eaf38ae34 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#10 0x00007f9eaf392671 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007f9eae4848f9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#12 0x00007f9eae487998 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#13 0x00007f9eae4dafd4 in  () at /usr/lib/libQt5Core.so.5
#14 0x00007f9eac769a2f in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#15 0x00007f9eac76b5e9 in  () at /usr/lib/libglib-2.0.so.0
#16 0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#17 0x00007f9eae4da5a9 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f9eae2c75c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#20 0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#21 0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#22 0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f9e8e7fa700 (LWP 5740)):
#0  0x00007f9eadfa5c21 in poll () at /usr/lib/libc.so.6
#1  0x00007f9eac76b540 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9eae4da5c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f9eae2c75c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f9e8effb700 (LWP 5737)):
#0  0x00007f9eac76203f in g_main_context_query () at /usr/lib/libglib-2.0.so.0
#1  0x00007f9eac76b4bc in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9eae4da5c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f9eae2c75c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f9eafe0ce5b in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f9e95aa6700 (LWP 5736)):
#0  0x00007f9ead262afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9e960b8be4 in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f9e960b8908 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f9ea48df700 (LWP 5734)):
#0  0x00007f9eac7193b9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f9eac76b525 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9eae4da5c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f9eae2c75c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f9eaeaeab89 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f9ea600f700 (LWP 5733)):
#0  0x00007f9eadfa17a4 in read () at /usr/lib/libc.so.6
#1  0x00007f9eac719971 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9eac76a0b0 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9eac76b4e6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f9eae4da5c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f9eae2c75c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f9eaf8b4ba6 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f9ea786a700 (LWP 5732)):
#0  0x00007f9eadfa5c21 in poll () at /usr/lib/libc.so.6
#1  0x00007f9eac66d630 in  () at /usr/lib/libxcb.so.1
#2  0x00007f9eac66f2db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f9ea884c96b in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f9eae2c89cc in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f9ead25ca9d in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f9eadfb0b23 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f9ea9657080 (LWP 5731)):
#0  0x00007f9eadfa17a4 in read () at /usr/lib/libc.so.6
#1  0x00007f9eac719971 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9eac76a0b0 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9eac76b4e6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f9eac76b62e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f9eae4da5c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f9eae48358c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f9eae48b896 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#8  0x000055cc2b85a616 in  ()
#9  0x00007f9eaded9223 in __libc_start_main () at /usr/lib/libc.so.6
#10 0x000055cc2b85abde in _start ()
[Inferior 1 (process 5731) detached]

Reported using DrKonqi