SUMMARY
Clicking Reload after installing debug symbols raised crash.
I see other 'reload' related crashes, but I won't pretend that I can interpret the backtrace, so have no clue if duplicate.  Also no clue if already fixed in the latest version - sorry about that.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.12.6
KDE Frameworks Version: 5.44.0
Qt Version: 5.9.5

ADDITIONAL INFORMATION
Backtrace:

Application: drkonqi (drkonqi), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f753dbfed80 (LWP 16846))]

Thread 10 (Thread 0x7f75037fe700 (LWP 16879)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c8850cd8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c8850c88, cond=0x5625c8850cb0) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c8850cb0, mutex=0x5625c8850c88) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f75037fe700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f7503fff700 (LWP 16878)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c8850cd8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c8850c88, cond=0x5625c8850cb0) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c8850cb0, mutex=0x5625c8850c88) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f7503fff700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f7510fc3700 (LWP 16877)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c8850b98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c8850b48, cond=0x5625c8850b70) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c8850b70, mutex=0x5625c8850b48) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f7510fc3700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f75117c4700 (LWP 16876)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c8850b98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c8850b48, cond=0x5625c8850b70) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c8850b70, mutex=0x5625c8850b48) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f75117c4700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f7511fc5700 (LWP 16875)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c8850b98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c8850b48, cond=0x5625c8850b70) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c8850b70, mutex=0x5625c8850b48) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f7511fc5700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f75127c6700 (LWP 16874)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c87d6c20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c87d6bd0, cond=0x5625c87d6bf8) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c87d6bf8, mutex=0x5625c87d6bd0) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f75127c6700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f7513108700 (LWP 16873)):
#0  0x00007f753725f9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5625c88a78b0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f753725f9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5625c88a7860, cond=0x5625c88a7888) at pthread_cond_wait.c:502
#2  0x00007f753725f9f3 in __pthread_cond_wait (cond=0x5625c88a7888, mutex=0x5625c88a7860) at pthread_cond_wait.c:655
#3  0x00007f751683509d in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f75168358d8 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7516834fb2 in  () at /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#6  0x00007f75372596db in start_thread (arg=0x7f7513108700) at pthread_create.c:463
#7  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f752145a700 (LWP 16849)):
#0  0x00007f75391e6bf9 in __GI___poll (fds=0x7f751c019d30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f753519e439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f753519e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7539b2f90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f7539ad49ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f75398f322a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f753b1b7d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f75398f816d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f75372596db in start_thread (arg=0x7f752145a700) at pthread_create.c:463
#9  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f752ad27700 (LWP 16847)):
#0  0x00007f75391e6bf9 in __GI___poll (fds=0x7f752ad26ba8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7534d30747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f7534d3236a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f752d2872a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f75398f816d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f75372596db in start_thread (arg=0x7f752ad27700) at pthread_create.c:463
#6  0x00007f75391f388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f753dbfed80 (LWP 16846)):
[KCrash Handler]
#6  0x00005625c6f78d79 in BacktraceLine::type() const (this=<optimized out>) at ./src/parser/backtraceline.h:59
#7  0x00005625c6f78d79 in GdbHighlighter::highlightBlock(QString const&) (this=0x5625c88b9a30, text=...) at ./src/gdbhighlighter.cpp:80
#8  0x00007f753a1fb548 in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f753a1fb700 in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007f7539b055b5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f753a42273a in QTextDocument::contentsChange(int, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f753a1b84f1 in QTextDocumentPrivate::finishEdit() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f753aa2f7ec in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f753aa18789 in QTextEdit::append(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00005625c6f66dd0 in BacktraceWidget::backtraceNewLine(QString const&) (this=<optimized out>, line=...) at ./src/backtracewidget.cpp:316
#16 0x00007f7539b056cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00005625c6fb3715 in BacktraceGenerator::newLine(QString const&) (this=this@entry=0x5625c877ea90, _t1=...) at ./obj-x86_64-linux-gnu/src/drkonqi_autogen/EWIEGA46WW/moc_backtracegenerator.cpp:201
#18 0x00005625c6f6afca in BacktraceGenerator::slotReadInput() (this=0x5625c877ea90) at ./src/backtracegenerator.cpp:128
#19 0x00007f7539b056cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f7539a5137a in QProcess::readyReadStandardOutput(QProcess::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f7539a57d69 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f7539a58240 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f7539b055
Windows: 
MacOS: 
Linux/KDE Plasma: b5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f7539b11a38 in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f7539b11e02 in QSocketNotifier::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f753a85482c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f753a85c0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f7539ad69a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f7539b3054d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f753519e287 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f753519e4c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f753519e54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f7539b2f8ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f7539ad49ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f7539adda84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00005625c6f5f1fe in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:173