Application: kdiff3 (1.11.2 (64 bit))

Qt Version: 6.7.2
Frameworks Version: 6.3.0
Operating System: Linux 6.9.7-arch1-1 x86_64
Windowing System: Wayland
Distribution: Arch Linux
DrKonqi: 6.1.1 [CoredumpBackend]

-- Information about the crash:
The problem can be reproduced as follows:

Create three conflicting files and attempt to merge them using kdiff3:

    echo a > a && echo b > b && echo c > c && kdiff3 -m a b c

After kdiff3 started, press the following keys:

    return (closing the dialog)
    ctrl + end (jump to end of editing buffer)
    return (insert new line; strangely this does not move the cursor)
    ctrl + end (jump to end of editing buffer)
    x (insert character x)
    shift + left (select to the left)
    delete (crash)

The crash can be reproduced every time.

-- Backtrace:
Application: KDiff3 (kdiff3), signal: Aborted
Content of s_kcrashErrorMessage: std::unique_ptr<char []> = {get() = <optimized out>}
[New LWP 197937]
[New LWP 197951]
[New LWP 197952]
[New LWP 197959]
[New LWP 197941]
[New LWP 197960]
[New LWP 197940]
[New LWP 197938]
[New LWP 197942]
[New LWP 197957]
[New LWP 197939]
[New LWP 197953]
[New LWP 197961]
[New LWP 197958]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `kdiff3 -m a b c'.
Program terminated with signal SIGABRT, Aborted.
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
44	      return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
[Current thread is 1 (Thread 0x7359f9519a00 (LWP 197937))]

Cannot QML trace cores :(
[Current thread is 1 (Thread 0x7359f9519a00 (LWP 197937))]

Thread 14 (Thread 0x7359db2006c0 (LWP 197958)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a1631128d04, expected=0, op=137, abstime=0x7359db1ffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a1631128d04, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359db1ffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a1631128d04, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359db1ffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a1631128cd8, mutex=<optimized out>, clockid=1, abstime=0x7359db1ffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a1631128cd8, mutex=<optimized out>, abstime=0x7359db1ffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a1631128cb0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a1631128cb0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a1630f99970) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a1630f99970) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 13 (Thread 0x7359d20006c0 (LWP 197961)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a163112e814, expected=0, op=137, abstime=0x7359d1fffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a163112e814, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d1fffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a163112e814, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d1fffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a163112e7e8, mutex=<optimized out>, clockid=1, abstime=0x7359d1fffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a163112e7e8, mutex=<optimized out>, abstime=0x7359d1fffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a163112e7c0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a163112e7c0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a1630fffb60) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a1630fffb60) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 12 (Thread 0x7359dbc006c0 (LWP 197953)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a16308fa6b4, expected=0, op=137, abstime=0x7359dbbffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a16308fa6b4, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359dbbffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a16308fa6b4, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359dbbffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a16308fa688, mutex=<optimized out>, clockid=1, abstime=0x7359dbbffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a16308fa688, mutex=<optimized out>, abstime=0x7359dbbffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a16308fa660, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a16308fa660, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a1630b3f780) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a1630b3f780) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 11 (Thread 0x7359f30006c0 (LWP 197939)):
#0  0x00007359fe91c39d in __GI___poll (fds=fds@entry=0x7359f2fffb20, nfds=nfds@entry=2, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007359fb974257 in poll (__fds=0x7359f2fffb20, __nfds=2, __timeout=-1) at /usr/include/bits/poll2.h:39
#2  QtWaylandClient::EventThread::run (this=0x5a16305a5e90) at /usr/src/debug/qt6-wayland/qtwayland/src/client/qwaylanddisplay.cpp:182
#3  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#4  (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#5  QThreadPrivate::start (arg=0x5a16305a5e90) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#6  0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#7  0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 10 (Thread 0x7359d92006c0 (LWP 197957)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x7359ec002280, expected=0, op=137, abstime=0x7359d91ffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x7359ec002280, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d91ffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x7359ec002280, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d91ffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x7359ec002258, mutex=<optimized out>, clockid=1, abstime=0x7359d91ffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x7359ec002258, mutex=<optimized out>, abstime=0x7359d91ffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x7359ec002230, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x7359ec002230, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a16309ceb50) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a16309ceb50) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 9 (Thread 0x7359f12006c0 (LWP 197942)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a16306ee530, expected=0, op=393, abstime=0x0, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a16306ee530, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a16306ee530, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a5ed9 in __pthread_cond_wait_common (cond=0x5a16306ee508, mutex=<optimized out>, clockid=0, abstime=0x0) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x5a16306ee508, mutex=<optimized out>) at pthread_cond_wait.c:618
#5  0x00007359e9c9d47e in cnd_wait () at ../mesa-24.1.2/src/c11/impl/threads_posix.c:135
#6  0x00007359e9c7b22c in util_queue_thread_func () at ../mesa-24.1.2/src/util/u_queue.c:290
#7  0x00007359e9c9d3ad in impl_thrd_routine () at ../mesa-24.1.2/src/c11/impl/threads_posix.c:67
#8  0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#9  0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 8 (Thread 0x7359f8e006c0 (LWP 197938)):
#0  0x00007359fe91c39d in __GI___poll (fds=0x5a1630589b50, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007359fe2398fd in g_main_context_poll_unlocked (priority=2147483647, context=0x7359f4000c80, timeout=<optimized out>, fds=0x5a1630589b50, n_fds=2) at ../glib/glib/gmain.c:4521
#2  g_main_context_iterate_unlocked.isra.0 (context=context@entry=0x7359f4000c80, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4212
#3  0x00007359fe1d6f95 in g_main_context_iteration (context=0x7359f4000c80, may_block=1) at ../glib/glib/gmain.c:4282
#4  0x00007359ff1a2cbd in QEventDispatcherGlib::processEvents (this=0x7359f4000b70, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:394
#5  0x00007359fef4f01e in QEventLoop::processEvents (this=0x7359f8dffae0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:100
#6  QEventLoop::exec (this=0x7359f8dffae0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:182
#7  0x00007359ff03a410 in QThread::exec (this=this@entry=0x7359fedfeb20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qflags.h:74
#8  0x00007359fed75e4e in QDBusConnectionManager::run (this=0x7359fedfeb20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/dbus/qdbusconnectionmanager.cpp:144
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x7359fedfeb20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 7 (Thread 0x7359f26006c0 (LWP 197940)):
#0  0x00007359fe91c39d in __GI___poll (fds=fds@entry=0x7359f25ffb20, nfds=nfds@entry=2, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007359fb974257 in poll (__fds=0x7359f25ffb20, __nfds=2, __timeout=-1) at /usr/include/bits/poll2.h:39
#2  QtWaylandClient::EventThread::run (this=0x5a16305912d0) at /usr/src/debug/qt6-wayland/qtwayland/src/client/qwaylanddisplay.cpp:182
#3  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#4  (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#5  QThreadPrivate::start (arg=0x5a16305912d0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#6  0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#7  0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 6 (Thread 0x7359d2a006c0 (LWP 197960)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a1631129984, expected=0, op=137, abstime=0x7359d29ffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a1631129984, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d29ffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a1631129984, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d29ffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a1631129958, mutex=<optimized out>, clockid=1, abstime=0x7359d29ffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a1631129958, mutex=<optimized out>, abstime=0x7359d29ffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a1631129930, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a1631129930, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a16311297f0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a16311297f0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 5 (Thread 0x7359f1c006c0 (LWP 197941)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a16306f8b78, expected=0, op=393, abstime=0x0, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a16306f8b78, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a16306f8b78, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a5ed9 in __pthread_cond_wait_common (cond=0x5a16306f8b50, mutex=<optimized out>, clockid=0, abstime=0x0) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x5a16306f8b50, mutex=<optimized out>) at pthread_cond_wait.c:618
#5  0x00007359e9c9d47e in cnd_wait () at ../mesa-24.1.2/src/c11/impl/threads_posix.c:135
#6  0x00007359e9c7b22c in util_queue_thread_func () at ../mesa-24.1.2/src/util/u_queue.c:290
#7  0x00007359e9c9d3ad in impl_thrd_routine () at ../mesa-24.1.2/src/c11/impl/threads_posix.c:67
#8  0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#9  0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 4 (Thread 0x7359d3e006c0 (LWP 197959)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a1631128eb0, expected=0, op=137, abstime=0x7359d3dffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a1631128eb0, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d3dffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a1631128eb0, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359d3dffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a1631128e88, mutex=<optimized out>, clockid=1, abstime=0x7359d3dffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a1631128e88, mutex=<optimized out>, abstime=0x7359d3dffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a1631128e60, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a1631128e60, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a1631128d20) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a1631128d20) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 3 (Thread 0x7359e90006c0 (LWP 197952)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a1630900130, expected=0, op=137, abstime=0x7359e8fffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a1630900130, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359e8fffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a1630900130, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359e8fffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a1630900108, mutex=<optimized out>, clockid=1, abstime=0x7359e8fffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a1630900108, mutex=<optimized out>, abstime=0x7359e8fffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a16309000e0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a16309000e0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a163092da70) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a163092da70) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 2 (Thread 0x7359e9a006c0 (LWP 197951)):
#0  0x00007359fe8a34e9 in __futex_abstimed_wait_common64 (private=0, futex_word=0x5a16308fff10, expected=0, op=137, abstime=0x7359e99ffa80, cancel=true) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5a16308fff10, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359e99ffa80, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007359fe8a356f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5a16308fff10, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7359e99ffa80, private=private@entry=0) at futex-internal.c:139
#3  0x00007359fe8a6242 in __pthread_cond_wait_common (cond=0x5a16308ffee8, mutex=<optimized out>, clockid=1, abstime=0x7359e99ffa80) at pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=0x5a16308ffee8, mutex=<optimized out>, abstime=0x7359e99ffa80) at pthread_cond_wait.c:643
#5  0x00007359ff0ce0b8 in QWaitConditionPrivate::wait_relative (this=0x5a16308ffec0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:92
#6  QWaitConditionPrivate::wait (this=0x5a16308ffec0, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:100
#7  QWaitCondition::wait (this=<optimized out>, mutex=0x5a16309e6ef8, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:180
#8  0x00007359ff0c7db2 in QThreadPoolThread::run (this=0x5a16308b3c10) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthreadpool.cpp:116
#9  0x00007359ff0c9747 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:326
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:262
#11 QThreadPrivate::start (arg=0x5a16308b3c10) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:285
#12 0x00007359fe8a6ded in start_thread (arg=<optimized out>) at pthread_create.c:447
#13 0x00007359fe92a0dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 1 (Thread 0x7359f9519a00 (LWP 197937)):
[KCrash Handler]
#5  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#6  0x00007359fe8a8eb3 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:78
#7  0x00007359fe850a30 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007359fe8384c3 in __GI_abort () at abort.c:79
#9  0x00007359fe8383df in __assert_fail_base (fmt=0x7359fe9c3b68 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x5a15f161a0f9 "false", file=file@entry=0x5a15f1629068 "/usr/src/debug/kdiff3/kdiff3-1.11.2/src/mergeresultwindow.cpp", line=line@entry=2457, function=function@entry=0x5a15f163c2d8 "bool MergeResultWindow::deleteSelection2(QString&, SafeInt<int>&, qint32&, std::__cxx11::list<MergeBlock>::iterator&, std::__cxx11::list<MergeEditLine>::iterator&)") at assert.c:94
#10 0x00007359fe848c67 in __assert_fail (assertion=0x5a15f161a0f9 "false", file=0x5a15f1629068 "/usr/src/debug/kdiff3/kdiff3-1.11.2/src/mergeresultwindow.cpp", line=2457, function=0x5a15f163c2d8 "bool MergeResultWindow::deleteSelection2(QString&, SafeInt<int>&, qint32&, std::__cxx11::list<MergeBlock>::iterator&, std::__cxx11::list<MergeEditLine>::iterator&)") at assert.c:103
#11 0x00005a15f15ce4a0 in MergeResultWindow::deleteSelection2 (this=this@entry=0x5a1630d760e0, s=..., x=..., y=@0x7ffc1a8adf74: 2, mbIt=..., melIt=...) at /usr/src/debug/kdiff3/kdiff3-1.11.2/src/mergeresultwindow.cpp:2457
#12 0x00005a15f15cf7d0 in MergeResultWindow::keyPressEvent (this=0x5a1630d760e0, keyEvent=0x7ffc1a8ae640) at /usr/src/debug/kdiff3/kdiff3-1.11.2/src/mergeresultwindow.cpp:2012
#13 0x00007359fff4bd94 in QWidget::event (this=0x5a1630d760e0, event=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qwidget.cpp:9058
#14 0x00007359ffefc51c in QApplicationPrivate::notify_helper (this=this@entry=0x5a1630578250, receiver=receiver@entry=0x5a1630d760e0, e=e@entry=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3287
#15 0x00007359fff01c52 in QApplication::notify (this=<optimized out>, receiver=<optimized out>, e=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2706
#16 0x00007359fef44d28 in QCoreApplication::notifyInternal2 (receiver=0x5a1630d760e0, event=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
#17 0x00007359fef44d5a in QCoreApplication::forwardEvent (receiver=<optimized out>, event=<optimized out>, originatingEvent=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1157
#18 0x00007359fff635b6 in QWidgetWindow::handleGestureEvent (this=<optimized out>, e=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qwidgetwindow.cpp:1130
#19 QWidgetWindow::event (this=0x5a1630b87350, event=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qwidgetwindow.cpp:334
#20 0x00007359ffefc51c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5a1630b87350, e=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3287
#21 0x00007359fef44d28 in QCoreApplication::notifyInternal2 (receiver=0x5a1630b87350, event=0x7ffc1a8ae640) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
#22 0x00007359fef44d7d in QCoreApplication::sendSpontaneousEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1597
#23 0x00007359ff5785e4 in QGuiApplicationPrivate::processKeyEvent (e=0x5a16308964e0) at /usr/src/debug/qt6-base/qtbase/src/gui/kernel/qguiapplication.cpp:2453
#24 0x00007359ff5e5d64 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at /usr/src/debug/qt6-base/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1114
#25 0x00007359ff9f9674 in userEventSourceDispatch (source=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/gui/platform/unix/qeventdispatcher_glib.cpp:38
#26 0x00007359fe1d7a89 in g_main_dispatch (context=0x7359f4000f00) at ../glib/glib/gmain.c:3344
#27 0x00007359fe2399b7 in g_main_context_dispatch_unlocked (context=0x7359f4000f00) at ../glib/glib/gmain.c:4152
#28 g_main_context_iterate_unlocked.isra.0 (context=context@entry=0x7359f4000f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4217
#29 0x00007359fe1d6f95 in g_main_context_iteration (context=0x7359f4000f00, may_block=1) at ../glib/glib/gmain.c:4282
#30 0x00007359ff1a2cbd in QEventDispatcherGlib::processEvents (this=0x5a1630598600, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:394
#31 0x00007359fef4f01e in QEventLoop::processEvents (this=0x7ffc1a8ae9b0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:100
#32 QEventLoop::exec (this=0x7ffc1a8ae9b0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:182
#33 0x00007359fef4934d in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qflags.h:74
#34 0x00007359ffef83ba in QApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2555
#35 0x00005a15f153d05e in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kdiff3/kdiff3-1.11.2/src/main.cpp:198

Reported using DrKonqi – (well, not really, DrKonqi showed a submission error: “Failed to submit bug report: Error transferring https://bugs.kde.org/rest/bug?token=***redacted*** - server replied: ” (nothing followed the colon). Therefore I copied the report into the web interface.)