Bug 472783

Created attachment 160614 [details]
first file to compare

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
Thread 1 "kate" received signal SIGSEGV, Segmentation fault.
0x00007ffff6e44f44 in QVector<QScriptLine>::at (i=0, this=0x0) at ../../include/QtCore/../../src/corelib/tools/qvector.h:450
Download failed: Invalid argument.  Continuing without source file ./src/gui/../../include/QtCore/../../src/corelib/tools/qvector.h.       
450     ../../include/QtCore/../../src/corelib/tools/qvector.h: No such file or directory.
(gdb) bt
#0  0x00007ffff6e44f44 in QVector<QScriptLine>::at (i=0, this=0x0) at ../../include/QtCore/../../src/corelib/tools/qvector.h:450
#1  QTextLine::naturalTextRect (this=this@entry=0x7fffffffcba0) at text/qtextlayout.cpp:1443
#2  0x00007ffff7f1baa4 in DiffEditor::paintEvent (this=<optimized out>, e=<optimized out>) at ./apps/lib/diff/diffeditor.cpp:324
#3  0x00007ffff75a4dc8 in QWidget::event (this=this@entry=0x555555debe20, event=event@entry=0x7fffffffce30) at kernel/qwidget.cpp:9045
#4  0x00007ffff76505fe in QFrame::event (this=0x555555debe20, e=0x7fffffffce30) at widgets/qframe.cpp:550
#5  0x00007ffff66b21db in QCoreApplicationPrivate::sendThroughObjectEventFilters (receiver=receiver@entry=0x555556d646b0, 
    event=event@entry=0x7fffffffce30) at kernel/qcoreapplication.cpp:1190
#6  0x00007ffff7562f5e in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x555556d646b0, e=0x7fffffffce30)
    at kernel/qapplication.cpp:3634
#7  0x00007ffff66b2458 in QCoreApplication::notifyInternal2 (receiver=0x555556d646b0, event=0x7fffffffce30)
    at kernel/qcoreapplication.cpp:1064
#8  0x00007ffff66b262e in QCoreApplication::sendSpontaneousEvent (receiver=<optimized out>, event=<optimized out>)
    at kernel/qcoreapplication.cpp:1474
#9  0x00007ffff759d085 in QWidgetPrivate::sendPaintEvent (this=this@entry=0x555556caa860, toBePainted=...) at kernel/qwidget.cpp:5479
#10 0x00007ffff759d999 in QWidgetPrivate::drawWidget (this=this@entry=0x555556caa860, pdev=0x555555f02a90, rgn=..., offset=..., 
    flags=flags@entry=..., sharedPainter=sharedPainter@entry=0x0, repaintManager=<optimized out>) at kernel/qwidget.cpp:5429
#11 0x00007ffff7574221 in QWidgetRepaintManager::paintAndFlush (this=0x555555d65e30) at kernel/qwidgetrepaintmanager.cpp:1016
#12 0x00007ffff75a5088 in QWidget::event (this=this@entry=0x555555931640, event=event@entry=0x555557024ad0) at kernel/qwidget.cpp:8990
#13 0x00007ffff76b989d in QMainWindow::event (this=this@entry=0x555555931640, event=event@entry=0x555557024ad0)
    at widgets/qmainwindow.cpp:1341
#14 0x00007ffff69de605 in KMainWindow::event (this=this@entry=0x555555931640, ev=ev@entry=0x555557024ad0) at ./src/kmainwindow.cpp:961
#15 0x00007ffff6a1f4a7 in KXmlGuiWindow::event (this=0x555555931640, ev=0x555557024ad0) at ./src/kxmlguiwindow.cpp:220
#16 0x00007ffff7562f6e in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x555555931640, e=0x555557024ad0)
    at kernel/qapplication.cpp:3640
#17 0x00007ffff66b2458 in QCoreApplication::notifyInternal2 (receiver=0x555555931640, event=0x555557024ad0)
    at kernel/qcoreapplication.cpp:1064
#18 0x00007ffff66b261e in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>)
    at kernel/qcoreapplication.cpp:1462
#19 0x00007ffff66b53e1 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x55555556c4b0)
    at kernel/qcoreapplication.cpp:1821
#20 0x00007ffff66b5868 in QCoreApplication::sendPostedEvents (receiver=<optimized out>, event_type=<optimized out>)
    at kernel/qcoreapplication.cpp:1680
#21 0x00007ffff670a903 in postEventSourceDispatch (s=0x555555663280) at kernel/qeventdispatcher_glib.cpp:277
#22 0x00007ffff45185e5 in g_main_dispatch (context=0x7fffe8000ee0) at ../../../glib/gmain.c:3460
#23 g_main_context_dispatch (context=context@entry=0x7fffe8000ee0) at ../../../glib/gmain.c:4200
#24 0x00007ffff45188e8 in g_main_context_iterate (context=context@entry=0x7fffe8000ee0, block=block@entry=1, dispatch=dispatch@entry=1, 
    self=<optimized out>) at ../../../glib/gmain.c:4276
#25 0x00007ffff451897c in g_main_context_iteration (context=0x7fffe8000ee0, may_block=1) at ../../../glib/gmain.c:4343
#26 0x00007ffff6709fe6 in QEventDispatcherGlib::processEvents (this=0x555555676730, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#27 0x00007ffff66b0edb in QEventLoop::exec (this=this@entry=0x7fffffffd6c0, flags=..., flags@entry=...)
--Type <RET> for more, q to quit, c to continue without paging--c
    at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#28 0x00007ffff66b9036 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#29 0x00007ffff6d3167c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1863
#30 0x00007ffff7562ee5 in QApplication::exec () at kernel/qapplication.cpp:2832
#31 0x000055555555ce33 in main (argc=<optimized out>, argv=<optimized out>) at ./apps/kate/main.cpp:603


STEPS TO REPRODUCE
1. Open both files
2. Right click other file's tab -> compare with active document
3. quickly scroll upward with mouse wheel

OBSERVED RESULT
Kate crashes

EXPECTED RESULT
Kate scrolls to the top of the files

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 6.4.0-1-amd64
(available in About System)
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
link to second file
https://pastebin.com/9vr6Hcyk