https://bugs.kde.org/show_bug.cgi?id=473399
Bug ID: 473399
Summary: On Git master/1.10, application crashes when word wrap
is enabled, selecting text, and refreshing diff
Classification: Applications
Product: kdiff3
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: application
Assignee: reeves...@gmail.com
Reporter: nyanpas...@tuta.io
Target Milestone: ---
SUMMARY
If I open the application to compare two files with word wrap enabled, make a
selection, then press F5 or Ctrl+Shift+Y to reload the document, it crashes.
STEPS TO REPRODUCE
1. `kdiff3 1.txt 2.txt` (can be 1 paragraph or more than 1 page, same or
different).
2. Check that word wrap is enabled.
3. Double-click the text to select a word.
4. Press F5.
Alternatively enable word wrap, then double-click a word and press Ctrl+Y to
add a manual alignment.
OBSERVED RESULT
Crash with SIGABRT: ASSERT failure in QVector<T>::operator[]: "index out of
range", file /usr/include/qt/QtCore/qvector.h, line 457
#0 __pthread_kill_implementation (threadid=<optimized out>,
signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1 0x00007ffff568e8a3 in __pthread_kill_internal (signo=6, threadid=<optimized
out>) at pthread_kill.c:78
#2 0x00007ffff563e668 in __GI_raise (sig=sig@entry=6) at
../sysdeps/posix/raise.c:26
#3 0x00007ffff56264b8 in __GI_abort () at abort.c:79
#4 0x00007ffff5ea0098 in qt_assert(char const*, char const*, int) () at
/usr/lib/libQt5Core.so.5
#5 0x00007ffff5ea0157 in () at /usr/lib/libQt5Core.so.5
#6 0x0000555555763f60 in QVector<Diff3WrapLine>::operator[](int)
(this=0x5555560cc350, i=0) at /usr/include/qt/QtCore/qvector.h:457
#7 0x000055555575b290 in DiffTextWindow::convertLineCoordsToD3LCoords(LineRef,
int, int&, int&) const (this=0x5555560cc010, line=..., pos=31,
d3LIdx=@0x7fffffffd24c: 3, d3LPos=@0x7fffffffd250: 31) at
/home/nyanpasu64/code/kdiff3/src/difftextwindow.cpp:1529
#8 0x000055555575bd04 in DiffTextWindow::convertSelectionToD3LCoords() const
(this=0x5555560cc010) at
/home/nyanpasu64/code/kdiff3/src/difftextwindow.cpp:1641
#9 0x000055555573cbfe in KDiff3App::recalcWordWrap(int) (this=0x555555a7f660,
visibleTextWidthForPrinting=-1) at
/home/nyanpasu64/code/kdiff3/src/pdiff.cpp:1477
#10 0x000055555573cb0f in KDiff3App::slotRecalcWordWrap() (this=0x555555a7f660)
at /home/nyanpasu64/code/kdiff3/src/pdiff.cpp:1459
#11 0x00005555556f626e in QtPrivate::FunctorCall<QtPrivate::IndexesList<>,
QtPrivate::List<>, void, void (KDiff3App::*)()>::call(void (KDiff3App::*)(),
KDiff3App*, void**) (f=(void (KDiff3App::*)(class KDiff3App * const))
0x55555573caf2 <KDiff3App::slotRecalcWordWrap()>, o=0x555555a7f660,
arg=0x5555561f16d8) at /usr/include/qt/QtCore/qobjectdefs_impl.h:152
#12 0x00005555556f38fc in QtPrivate::FunctionPointer<void
(KDiff3App::*)()>::call<QtPrivate::List<>, void>(void (KDiff3App::*)(),
KDiff3App*, void**) (f=(void (KDiff3App::*)(class KDiff3App * const))
0x55555573caf2 <KDiff3App::slotRecalcWordWrap()>, o=0x555555a7f660,
arg=0x5555561f16d8) at /usr/include/qt/QtCore/qobjectdefs_impl.h:185
#13 0x00005555556f16f1 in QtPrivate::QSlotObject<void (KDiff3App::*)(),
QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*,
void**, bool*) (which=1, this_=0x55555601c240, r=0x555555a7f660,
a=0x5555561f16d8, ret=0x0) at /usr/include/qt/QtCore/qobjectdefs_impl.h:418
#14 0x00007ffff60c4174 in QObject::event(QEvent*) () at
/usr/lib/libQt5Core.so.5
#15 0x00007ffff6d7893f in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/libQt5Widgets.so.5
#16 0x00007ffff609c6f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/libQt5Core.so.5
#17 0x00007ffff60a165b in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#18 0x00007ffff60e76d8 in () at /usr/lib/libQt5Core.so.5
#19 0x00007ffff450fa31 in g_main_context_dispatch () at
/usr/lib/libglib-2.0.so.0
#20 0x00007ffff456ccc9 in () at /usr/lib/libglib-2.0.so.0
#21 0x00007ffff450d0e2 in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#22 0x00007ffff60eb51c in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#23 0x00007ffff609b404 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#24 0x00007ffff609c8a3 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#25 0x00005555556d2cf7 in main(int, char**) (argc=3, argv=0x7fffffffdac8) at
/home/nyanpasu64/code/kdiff3/src/main.cpp:210
EXPECTED RESULT
No crash.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Kernel Version: 6.4.9-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5600X 6-Core Processor
Memory: 15.5 GiB of RAM
Graphics Processor: AMD Radeon RX 570 Series
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: B550M DS3H
This bug occurs on kdiff3 1.10+git 06a3487d030ba7fc401fc56280f96129a53c2fea and
master bd8ad0d72538bcc2a6490ebb93ce21ced5aa0cc5, but not on the tagged 1.10.5.
This could probably be bisected if needed, though that won't necessarily tell
*why* the change crashes.
ADDITIONAL INFORMATION
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