Description of problem:
I reproduced https://bugs.kde.org/show_bug.cgi?id=507599#c29:~:text=Perhaps%20you%20should%20try%20this%20on%20another%20PC/distro.

Version-Release number of selected component:
kwrite-25.04.3-1.fc42

Additional info:
reporter:       libreport-2.17.15
type:           CCpp
reason:         kwrite killed by SIGABRT
journald_cursor: s=a2d6d580caa24cf3a9483be7f85033e4;i=1c557e;b=5f07eb01675f4c0ebd0e6f0a0cf4b60c;m=4a8b4bba;t=63b4bc6671814;x=dd0d91b623bbad2b
executable:     /usr/bin/kwrite
cmdline:        /usr/bin/kwrite /home/RokeJulianLockhart/Downloads/official-cpe-dictionary_v2.3.xml
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/app-org.kde.kwrite
rootdir:        /
uid:            1000
kernel:         6.15.8-200.fc42.x86_64
package:        kwrite-25.04.3-1.fc42
runlevel:       N 5
backtrace_rating: 4
crash_function: QRegularExpressionPrivate::doMatch
comment:        I reproduced https://bugs.kde.org/show_bug.cgi?id=507599#c29:~:text=Perhaps%20you%20should%20try%20this%20on%20another%20PC/distro.

Truncated backtrace:
Thread no. 1 (41 frames)
 #6 QRegularExpressionPrivate::doMatch at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/text/qregularexpression.cpp:1264
 #7 QRegularExpression::matchView at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/text/qregularexpression.cpp:1646
 #8 regexMatch at /usr/src/debug/kf6-syntax-highlighting-6.16.0-1.fc42.x86_64/src/lib/rule.cpp:612
 #9 KSyntaxHighlighting::RegExpr::doMatch at /usr/src/debug/kf6-syntax-highlighting-6.16.0-1.fc42.x86_64/src/lib/rule.cpp:661
 #10 KSyntaxHighlighting::AbstractHighlighter::highlightLine at /usr/src/debug/kf6-syntax-highlighting-6.16.0-1.fc42.x86_64/src/lib/abstracthighlighter.cpp:290
 #11 KateHighlighting::doHighlight at /usr/src/debug/kf6-ktexteditor-6.16.0-1.fc42.x86_64/src/syntax/katehighlight.cpp:145
 #12 KateBuffer::doHighlight at /usr/src/debug/kf6-ktexteditor-6.16.0-1.fc42.x86_64/src/document/katebuffer.cpp:352
 #13 KTextEditor::DocumentPrivate::kateTextLine at /usr/src/debug/kf6-ktexteditor-6.16.0-1.fc42.x86_64/src/document/katedocument.cpp:5820
 #14 KateLineLayout::textLine at /usr/src/debug/kf6-ktexteditor-6.16.0-1.fc42.x86_64/src/render/katelinelayout.cpp:47
 #15 KateRenderer::layoutLine at /usr/src/debug/kf6-ktexteditor-6.16.0-1.fc42.x86_64/src/render/katerenderer.cpp:1232
 #16 KateTextPreview::paintEvent at /usr/src/debug/kf6-ktexteditor-6.16.0-1.fc42.x86_64/src/view/katetextpreview.cpp:135
 #17 QWidget::event at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidget.cpp:9367
 #18 QFrame::event at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/widgets/qframe.cpp:521
 #19 QApplicationPrivate::notify_helper at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
 #20 QCoreApplication::notifyInternal2 at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
 #21 QCoreApplication::sendSpontaneousEvent at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1560
 #22 QWidgetPrivate::sendPaintEvent at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidget.cpp:5671
 #23 QWidgetPrivate::drawWidget at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidget.cpp:5621
 #24 QWidgetRepaintManager::paintAndFlush at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidgetrepaintmanager.cpp:907
 #25 QWidgetRepaintManager::sync at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidgetrepaintmanager.cpp:632
 #26 QWidgetWindow::event at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidgetwindow.cpp:339
 #27 QApplicationPrivate::notify_helper at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
 #28 QCoreApplication::notifyInternal2 at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
 #29 QCoreApplication::sendSpontaneousEvent at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1560
 #30 QGuiApplicationPrivate::processExposeEvent at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:3480
 #31 QWindowSystemInterface::sendWindowSystemEvents at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qwindowsysteminterface.cpp:1113
 #32 QWindowSystemInterface::flushWindowSystemEvents at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qwindowsysteminterface.cpp:1082
 #33 QObject::event at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1431
 #34 QApplicationPrivate::notify_helper at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
 #35 QCoreApplication::notifyInternal2 at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
 #36 QCoreApplication::sendEvent at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1546
 #37 QCoreApplicationPrivate::sendPostedEvents at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1879
 #38 postEventSourceDispatch at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:246
 #40 g_main_context_dispatch_unlocked at ../glib/gmain.c:4249
 #41 g_main_context_iterate_unlocked at ../glib/gmain.c:4314
 #42 g_main_context_iteration at ../glib/gmain.c:4379
 #43 QEventDispatcherGlib::processEvents at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:399
 #44 QEventLoop::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/global/qflags.h:77
 #45 QCoreApplication::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1449
 #46 QGuiApplication::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:1986
 #47 QApplication::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:2570