Bug 394051

Summary: Segfault when searching term
Product: [Applications] Discover Reporter: Dan Ștefan Stroe <stroestefan>
Component: discoverAssignee: Aleix Pol <aleixpol>
Status: RESOLVED UNMAINTAINED    
Severity: normal CC: nate
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.10.5   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Dan Ștefan Stroe 2018-05-09 17:55:26 UTC 
Application: plasma-discover (5.10.5)

Qt Version: 5.9.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.0-41-generic x86_64
Distribution: Ubuntu 17.10

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

I was entering "latex" into the search box - application crashed when displaying results in the right panel

The crash can be reproduced every time.

-- Backtrace:
Application: Descoperă (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe30709a5c0 (LWP 4972))]

Thread 18 (Thread 0x7fe29da81700 (LWP 4992)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589dec6b38) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589dec6ae8, cond=0x55589dec6b10) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589dec6b10, mutex=0x55589dec6ae8) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe29da81700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fe29e282700 (LWP 4991)):
#0  0x00007fe2fd0bf678 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe2fd0c009b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3030d749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe302e9c3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe2fefb47fc in start_thread (arg=0x7fe29e282700) at pthread_create.c:465
#8  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fe29ea83700 (LWP 4990)):
#0  0x00007fe302795951 in __GI___poll (fds=0x55589cd12850, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fd0c0169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c0502 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe2a4979b26 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fe2fd0e7645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe29ea83700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fe29f284700 (LWP 4989)):
#0  0x00007fe302795951 in __GI___poll (fds=0x55589cd006f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fd0c0169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe2fd0c02c1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe2fd0e7645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe29f284700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fe2a695c700 (LWP 4987)):
#0  0x00007fe2fd1055b9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe2fd0c012e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3030d749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe302e9c3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe2fefb47fc in start_thread (arg=0x7fe2a695c700) at pthread_create.c:465
#8  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fe2b14f4700 (LWP 4986)):
#0  0x00007fe302795951 in __GI___poll (fds=0x7fe2ac002de0, nfds=1, timeout=9271) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fd0c0169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3030d749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe302e9c3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe2fefb47fc in start_thread (arg=0x7fe2b14f4700) at pthread_create.c:465
#8  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fe2d0bce700 (LWP 4984)):
#0  0x00007fe302795951 in __GI___poll (fds=0x7fe2b8004f00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fd0c0169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3030d749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe302e9c3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe30635a846 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d0bce700) at pthread_create.c:465
#9  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fe2d13cf700 (LWP 4982)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c801580) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c801530, cond=0x55589c801558) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c801558, mutex=0x55589c801530) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d13cf700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fe2d1bd0700 (LWP 4981)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c801584) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c801530, cond=0x55589c801558) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c801558, mutex=0x55589c801530) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d1bd0700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fe2d23d1700 (LWP 4980)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c801498) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c801448, cond=0x55589c801470) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c801470, mutex=0x55589c801448) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d23d1700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fe2d2bd2700 (LWP 4979)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c80149c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c801448, cond=0x55589c801470) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c801470, mutex=0x55589c801448) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d2bd2700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fe2d33d3700 (LWP 4978)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c80149c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c801448, cond=0x55589c801470) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c801470, mutex=0x55589c801448) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d33d3700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fe2d3bd4700 (LWP 4977)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c804ef0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c804ea0, cond=0x55589c804ec8) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c804ec8, mutex=0x55589c804ea0) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d3bd4700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe2d89f4700 (LWP 4976)):
#0  0x00007fe2fefbb072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55589c7fc97c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe2fefbb072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55589c7fc928, cond=0x55589c7fc950) at pthread_cond_wait.c:502
#2  0x00007fe2fefbb072 in __pthread_cond_wait (cond=0x55589c7fc950, mutex=0x55589c7fc928) at pthread_cond_wait.c:655
#3  0x00007fe2e156024b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fe2e1560167 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2d89f4700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe2e9994700 (LWP 4975)):
#0  0x00007fe302795951 in __GI___poll (fds=0x7fe2dc0029e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fd0c0169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3030d749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe302e9c3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe303aaef45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe2fefb47fc in start_thread (arg=0x7fe2e9994700) at pthread_create.c:465
#9  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe2eabac700 (LWP 4974)):
#0  0x00007fe302795951 in __GI___poll (fds=0x7fe2e4018f10, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fd0c0169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3030d749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe302e9c3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe305242e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe2fefb47fc in start_thread (arg=0x7fe2eabac700) at pthread_create.c:465
#9  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe2f36f4700 (LWP 4973)):
#0  0x00007fe302795951 in __GI___poll (fds=0x7fe2f36f3bb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe2fce58747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe2fce5a53a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe2f5c7ef09 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fe302ea129d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe2fefb47fc in start_thread (arg=0x7fe2f36f4700) at pthread_create.c:465
#6  0x00007fe3027a1b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe30709a5c0 (LWP 4972)):
[KCrash Handler]
#6  0x00007fe305ffdb66 in  () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#7  0x00007fe305ffdd88 in AbstractResource::categoryMatches(Category*) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#8  0x00007fe305ffe0ae in  () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#9  0x00007fe305ffe5a0 in AbstractResource::categoryObjects() const () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#10 0x00007fe305ff45e4 in ResourcesProxyModel::fetchSubcategories() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#11 0x00007fe305ff4c3a in ResourcesProxyModel::addResources(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#12 0x00007fe3030ad9ff in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fe30600c6a2 in ResultsStream::resourcesFound(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#14 0x00007fe305fef1c0 in AggregatedResultsStream::emitResults() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#15 0x00007fe3030ad9ff in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fe3030ba3b7 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fe3030ba718 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fe3030ae40b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fe30468946c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fe304690d34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fe30307ede8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fe3030d691e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fe3030d70e1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fe2fd0bffb7 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fe2fd0c01f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fe2fd0c027c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fe3030d747f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fe30307ce3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fe303085da4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x000055589bf56fa8 in  ()
#31 0x00007fe3026ae1c1 in __libc_start_main (main=0x55589bf566d0, argc=1, argv=0x7fff10680728, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff10680718) at ../csu/libc-start.c:308
#32 0x000055589bf5722a in _start ()

Reported using DrKonqi
Comment 1 Dan Ștefan Stroe 2018-05-09 20:45:20 UTC 
If this helps - crash occurred when the search was in "Home" category

When same search was filtered by "Applications" the application did not crash anymore

Reproduced again to observe - it takes ~5 secs before crashing, after busy status changes to "Still looking ..."

Regards
Comment 2 Aleix Pol 2018-05-10 13:37:06 UTC 
Hi,
I'm sorry but you are using a really old version of Discover that isn't maintained anymore.
Would you consider upgrading to the latest stable version? You can find instructions to do that in the Kubuntu site.