SUMMARY

The bug can't be reproduced every time

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: ArchLinux 
(available in About System)
KDE Plasma Version: 5.15.4
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.2


Application: Baloo File Indexing Daemon (baloo_file), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8a487af800 (LWP 5261))]

Thread 3 (Thread 0x7f8a473c5700 (LWP 5331)):
[KCrash Handler]
#6  0x00007f8a4c554d7f in raise () from /usr/lib/libc.so.6
#7  0x00007f8a4c53f672 in abort () from /usr/lib/libc.so.6
#8  0x00007f8a4ca797fc in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/libQt5Core.so.5
#9  0x00007f8a4ca78c83 in qt_assert_x(char const*, char const*, char const*, int) () from /usr/lib/libQt5Core.so.5
#10 0x00007f8a4d03013c in Baloo::IdTreeDB::put (this=this@entry=0x7f8a473c48b0, docId=<optimized out>, docId@entry=11259003363395592, subDocIds=...) at /usr/src/debug/baloo-5.56.0/src/engine/idtreedb.cpp:72
#11 0x00007f8a4d02b59d in Baloo::DocumentUrlDB::add (this=<optimized out>, id=<optimized out>, parentId=11259003363395592, name=...) at /usr/src/debug/baloo-5.56.0/src/engine/documenturldb.cpp:119
#12 0x00007f8a4d02b880 in Baloo::DocumentUrlDB::put (this=this@entry=0x7f8a473c4b40, docId=docId@entry=11302567216678920, url=...) at /usr/src/debug/baloo-5.56.0/src/engine/documenturldb.cpp:69
#13 0x00007f8a4d04d2cb in Baloo::WriteTransaction::addDocument (this=0x56281eb41ff0, doc=...) at /usr/src/debug/baloo-5.56.0/src/engine/writetransaction.cpp:57
#14 0x00007f8a4d0450f5 in Baloo::Transaction::addDocument (this=this@entry=0x7f8a473c4c10, doc=...) at /usr/src/debug/baloo-5.56.0/src/engine/transaction.cpp:233
#15 0x000056281d092bd7 in Baloo::UnindexedFileIndexer::run (this=0x56281ec6d9c0) at /usr/include/qt/QtCore/qrefcount.h:60
#16 0x00007f8a4cab7a11 in ?? () from /usr/lib/libQt5Core.so.5
#17 0x00007f8a4cab396c in ?? () from /usr/lib/libQt5Core.so.5
#18 0x00007f8a4b5e2a9d in start_thread () from /usr/lib/libpthread.so.0
#19 0x00007f8a4c618af3 in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f8a47f08700 (LWP 5272)):
#0  0x00007f8a4c60dbf1 in poll () from /usr/lib/libc.so.6
#1  0x00007f8a4ac7f690 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f8a4ac7f77e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f8a4ccc5cb4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f8a4cc6ea8c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f8a4cab2569 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f8a4d073ba6 in ?? () from /usr/lib/libQt5DBus.so.5
#7  0x00007f8a4cab396c in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f8a4b5e2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f8a4c618af3 in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f8a487af800 (LWP 5261)):
#0  0x00007f8a4c60dbf1 in poll () from /usr/lib/libc.so.6
#1  0x00007f8a4ac7f690 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f8a4ac7f77e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f8a4ccc5cb4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f8a4cc6ea8c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f8a4cc76de6 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#6  0x000056281d081f1c in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/baloo-5.56.0/src/file/main.cpp:104
[Inferior 1 (process 5261) detached]