Application: kwin_x11 (5.27.8) Qt Version: 5.15.10 Frameworks Version: 5.110.0 Operating System: Linux 6.5.0-10-generic x86_64 Windowing System: X11 Distribution: Ubuntu 23.10 DrKonqi: 5.27.8 [CoredumpBackend] -- Information about the crash: after downloading RSS xml file from firefox, i opened it with default text editor, kate. then I tried to close (unsaved) RSS with Alt+F4 then kwin crashed. i pressed 'restart kwin' button, then it crashed again, and after that it works. The crash can be reproduced every time. -- Backtrace: Application: KWin (kwin_x11), signal: Segmentation fault PID: 1213265 (kwin_x11) UID: 1000 (scarf) GID: 1000 (scarf) Signal: 11 (SEGV) Timestamp: Sat 2023-11-11 14:39:42 KST (17s ago) Command Line: /usr/bin/kwin_x11 --replace Executable: /usr/bin/kwin_x11 Control Group: /user.slice/user-1000.slice/user@1000.service/session.slice/plasma-kwin_x11.service Unit: user@1000.service User Unit: plasma-kwin_x11.service Slice: user-1000.slice Owner UID: 1000 (scarf) Boot ID: 3a6f86b1cbd14dbb9934cd4d7cdc768f Machine ID: 137f3b8721984362860769e93fc61f71 Hostname: TG02 Storage: /var/lib/systemd/coredump/core.kwin_x11.1000.3a6f86b1cbd14dbb9934cd4d7cdc768f.1213265.1699681182000000.zst (present) Size on Disk: 16.4M Message: Process 1213265 (kwin_x11) of user 1000 dumped core. Module libsystemd.so.0 from deb systemd-253.5-1ubuntu6.amd64 Module libudev.so.1 from deb systemd-253.5-1ubuntu6.amd64 Stack trace of thread 1213265: #0 0x00007f83d729ec88 __GI___pthread_sigmask (libc.so.6 + 0x9ec88) #1 0x00007f83d7242b0d __GI___sigprocmask (libc.so.6 + 0x42b0d) #2 0x00007f83da56405f _ZN6KCrash15setCrashHandlerEPFviE (libKF5Crash.so.5 + 0x605f) #3 0x00007f83da56659b _ZN6KCrash19defaultCrashHandlerEi (libKF5Crash.so.5 + 0x859b) #4 0x00007f83d7242910 __restore_rt (libc.so.6 + 0x42910) #5 0x00007f83d8e75fa7 _ZN7QRegionD1Ev (libQt5Gui.so.5 + 0x475fa7) #6 0x00007f83d8e2884a n/a (libQt5Gui.so.5 + 0x42884a) #7 0x00007f83d8e1253d _ZN18QRasterPaintEngineD0Ev (libQt5Gui.so.5 + 0x41253d) #8 0x00007f83d8b97736 _ZN10QImageDataD1Ev (libQt5Gui.so.5 + 0x197736) #9 0x00007f83d8b97c0b _ZN6QImageD1Ev (libQt5Gui.so.5 + 0x197c0b) #10 0x00007f83da53fe7c _ZN12KDecoration216DecorationShadowD1Ev (libkdecorations2.so.5 + 0x1be7c) #11 0x00007f83da0adc82 _ZN4KWin6ShadowD1Ev (libkwin.so.5 + 0x2adc82) #12 0x00007f83da08418d n/a (libkwin.so.5 + 0x28418d) #13 0x00007f83da0e8584 _ZN4KWin6WindowD1Ev (libkwin.so.5 + 0x2e8584) #14 0x00007f83d9ff886d _ZN4KWin7DeletedD0Ev (libkwin.so.5 + 0x1f886d) #15 0x00007f83d86f976b _ZN7QObject5eventEP6QEvent (libQt5Core.so.5 + 0x2f976b) #16 0x00007f83d7b6bc82 _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x16bc82) #17 0x00007f83d86cc7a8 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 + 0x2cc7a8) #18 0x00007f83d86cfeb1 _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData (libQt5Core.so.5 + 0x2cfeb1) #19 0x00007f83d87286f7 n/a (libQt5Core.so.5 + 0x3286f7) #20 0x00007f83d6313b2c n/a (libglib-2.0.so.0 + 0x5ab2c) #21 0x00007f83d636f46f n/a (libglib-2.0.so.0 + 0xb646f) #22 0x00007f83d6311d20 g_main_context_iteration (libglib-2.0.so.0 + 0x58d20) #23 0x00007f83d8727daa _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x327daa) #24 0x00007f83d86cb15b _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2cb15b) #25 0x00007f83d86d3904 _ZN16QCoreApplication4execEv (libQt5Core.so.5 + 0x2d3904) #26 0x000055dfc0d1fb42 n/a (kwin_x11 + 0x47b42) #27 0x00007f83d72280d0 __libc_start_call_main (libc.so.6 + 0x280d0) #28 0x00007f83d7228189 __libc_start_main_impl (libc.so.6 + 0x28189) #29 0x000055dfc0d20fc5 n/a (kwin_x11 + 0x48fc5) Stack trace of thread 1213283: #0 0x00007ffcb0dfcbb2 n/a (linux-vdso.so.1 + 0xbb2) #1 0x00007f83d72e557d __GI___clock_gettime (libc.so.6 + 0xe557d) #2 0x00007f83ca710f84 n/a (libnvidia-glcore.so.535.129.03 + 0x1510f84) #3 0x00007f83ca711039 n/a (libnvidia-glcore.so.535.129.03 + 0x1511039) #4 0x00007f83cac6dbcd n/a (libnvidia-glcore.so.535.129.03 + 0x1a6dbcd) #5 0x00007f83ca823c67 n/a (libnvidia-glcore.so.535.129.03 + 0x1623c67) #6 0x00007f83ca8245af n/a (libnvidia-glcore.so.535.129.03 + 0x16245af) #7 0x00007f83cac587d8 n/a (libnvidia-glcore.so.535.129.03 + 0x1a587d8) #8 0x00007f83ca7df0c5 n/a (libnvidia-glcore.so.535.129.03 + 0x15df0c5) #9 0x00007f83ca7e032a n/a (libnvidia-glcore.so.535.129.03 + 0x15e032a) #10 0x00007f83ca7e074f n/a (libnvidia-glcore.so.535.129.03 + 0x15e074f) #11 0x00007f83ca781fca n/a (libnvidia-glcore.so.535.129.03 + 0x1581fca) #12 0x00007f83ca72af91 n/a (libnvidia-glcore.so.535.129.03 + 0x152af91) #13 0x00007f83ca72b45a n/a (libnvidia-glcore.so.535.129.03 + 0x152b45a) #14 0x00007f83ca713b04 n/a (libnvidia-glcore.so.535.129.03 + 0x1513b04) #15 0x00007f83d7297ada start_thread (libc.so.6 + 0x97ada) #16 0x00007f83d732847c __clone3 (libc.so.6 + 0x12847c) Stack trace of thread 1216236: #0 0x00007f83d7294076 __futex_abstimed_wait_common64 (libc.so.6 + 0x94076) #1 0x00007f83d72969fe __pthread_cond_wait_common (libc.so.6 + 0x969fe) #2 0x00007f83d84e0cab _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0xe0cab) #3 0x00007f83d9a145d5 n/a (libQt5Quick.so.5 + 0x2145d5) #4 0x00007f83d9a16a39 n/a (libQt5Quick.so.5 + 0x216a39) #5 0x00007f83d84daeb1 n/a (libQt5Core.so.5 + 0xdaeb1) #6 0x00007f83d7297ada start_thread (libc.so.6 + 0x97ada) #7 0x00007f83d732847c __clone3 (libc.so.6 + 0x12847c) Stack trace of thread 1213267: #0 0x00007ffcb0dfcbb2 n/a (linux-vdso.so.1 + 0xbb2) #1 0x00007f83d72e557d __GI___clock_gettime (libc.so.6 + 0xe557d) #2 0x00007f83d87276d5 n/a (libQt5Core.so.5 + 0x3276d5) #3 0x00007f83d8725e9d _ZN14QTimerInfoList17updateCurrentTimeEv (libQt5Core.so.5 + 0x325e9d) #4 0x00007f83d87264a9 _ZN14QTimerInfoList9timerWaitER8timespec (libQt5Core.so.5 + 0x3264a9) #5 0x00007f83d872814e n/a (libQt5Core.so.5 + 0x32814e) #6 0x00007f83d6313e06 n/a (libglib-2.0.so.0 + 0x5ae06) #7 0x00007f83d636f316 n/a (libglib-2.0.so.0 + 0xb6316) #8 0x00007f83d6311d20 g_main_context_iteration (libglib-2.0.so.0 + 0x58d20) #9 0x00007f83d8727dc6 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x327dc6) #10 0x00007f83d86cb15b _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2cb15b) #11 0x00007f83d84d9c52 _ZN7QThread4execEv (libQt5Core.so.5 + 0xd9c52) #12 0x00007f83d79851bb n/a (libQt5DBus.so.5 + 0x191bb) #13 0x00007f83d84daeb1 n/a (libQt5Core.so.5 + 0xdaeb1) #14 0x00007f83d7297ada start_thread (libc.so.6 + 0x97ada) #15 0x00007f83d732847c __clone3 (libc.so.6 + 0x12847c) Stack trace of thread 1213280: #0 0x00007f83d731a18f __GI___poll (libc.so.6 + 0x11a18f) #1 0x00007f83d636f3cf n/a (libglib-2.0.so.0 + 0xb63cf) #2 0x00007f83d6311d20 g_main_context_iteration (libglib-2.0.so.0 + 0x58d20) #3 0x00007f83d8727daa _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x327daa) #4 0x00007f83d86cb15b _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2cb15b) #5 0x00007f83d84d9c52 _ZN7QThread4execEv (libQt5Core.so.5 + 0xd9c52) #6 0x00007f83d9533219 n/a (libQt5Qml.so.5 + 0x333219) #7 0x00007f83d84daeb1 n/a (libQt5Core.so.5 + 0xdaeb1) #8 0x00007f83d7297ada start_thread (libc.so.6 + 0x97ada) #9 0x00007f83d732847c __clone3 (libc.so.6 + 0x12847c) Stack trace of thread 1241515: #0 0x00007f83d731a18f __GI___poll (libc.so.6 + 0x11a18f) #1 0x00007f83d636f3cf n/a (libglib-2.0.so.0 + 0xb63cf) #2 0x00007f83d6311d20 g_main_context_iteration (libglib-2.0.so.0 + 0x58d20) #3 0x00007f83d8727daa _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x327daa) #4 0x00007f83d86cb15b _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2cb15b) #5 0x00007f83d84d9c52 _ZN7QThread4execEv (libQt5Core.so.5 + 0xd9c52) #6 0x00007f83d84daeb1 n/a (libQt5Core.so.5 + 0xdaeb1) #7 0x00007f83d7297ada start_thread (libc.so.6 + 0x97ada) #8 0x00007f83d732847c __clone3 (libc.so.6 + 0x12847c) Stack trace of thread 1369442: #0 0x00007f83d731a18f __GI___poll (libc.so.6 + 0x11a18f) #1 0x00007f83d636f3cf n/a (libglib-2.0.so.0 + 0xb63cf) #2 0x00007f83d6311d20 g_main_context_iteration (libglib-2.0.so.0 + 0x58d20) #3 0x00007f83d8727daa _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x327daa) #4 0x00007f83d86cb15b _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2cb15b) #5 0x00007f83d84d9c52 _ZN7QThread4execEv (libQt5Core.so.5 + 0xd9c52) #6 0x00007f83d84daeb1 n/a (libQt5Core.so.5 + 0xdaeb1) #7 0x00007f83d7297ada start_thread (libc.so.6 + 0x97ada) #8 0x00007f83d732847c __clone3 (libc.so.6 + 0x12847c) ELF object binary architecture: AMD x86-64 This GDB supports auto-downloading debuginfo from the following URLs: <https://debuginfod.ubuntu.com> <https://driver-symbols.nvidia.com> Enable debuginfod for this session? (y or [n]) [answered N; input not from terminal] Debuginfod has been disabled. To make this setting permanent, add 'set debuginfod enabled off' to .gdbinit. [New LWP 1213265] [New LWP 1213283] [New LWP 1216236] [New LWP 1213267] [New LWP 1213280] [New LWP 1241515] [New LWP 1369442] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/usr/bin/kwin_x11 --replace'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __GI___pthread_sigmask (how=1, newmask=<optimized out>, oldmask=0x0) at ./nptl/pthread_sigmask.c:43 [Current thread is 1 (Thread 0x7f83d34da9c0 (LWP 1213265))] [Current thread is 1 (Thread 0x7f83d34da9c0 (LWP 1213265))] Thread 7 (Thread 0x7f834e3986c0 (LWP 1369442)): #0 0x00007f83d731a18f in __GI___poll (fds=0x7f8354001430, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f83d636f3cf in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f83d6311d20 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f83d8727daa in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f83d86cb15b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f83d84d9c52 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f83d84daeb1 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f83d7297ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444 #8 0x00007f83d732847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 6 (Thread 0x7f83863bc6c0 (LWP 1241515)): #0 0x00007f83d731a18f in __GI___poll (fds=0x7f837c04b580, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f83d636f3cf in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f83d6311d20 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f83d8727daa in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f83d86cb15b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f83d84d9c52 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f83d84daeb1 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f83d7297ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444 #8 0x00007f83d732847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 5 (Thread 0x7f8387bfe6c0 (LWP 1213280)): #0 0x00007f83d731a18f in __GI___poll (fds=0x7f83800013b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f83d636f3cf in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f83d6311d20 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f83d8727daa in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f83d86cb15b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f83d84d9c52 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f83d9533219 in ??? () at /lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007f83d84daeb1 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f83d7297ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444 #9 0x00007f83d732847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 4 (Thread 0x7f83d15ff6c0 (LWP 1213267)): #0 0x00007ffcb0dfcbb2 in ??? () #1 0x00007f83d72e557d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/sysv/linux/clock_gettime.c:42 #2 0x00007f83d87276d5 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #3 0x00007f83d8725e9d in QTimerInfoList::updateCurrentTime() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f83d87264a9 in QTimerInfoList::timerWait(timespec&) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f83d872814e in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f83d6313e06 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #7 0x00007f83d636f316 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #8 0x00007f83d6311d20 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #9 0x00007f83d8727dc6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #10 0x00007f83d86cb15b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #11 0x00007f83d84d9c52 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #12 0x00007f83d79851bb in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5 #13 0x00007f83d84daeb1 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #14 0x00007f83d7297ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444 #15 0x00007f83d732847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 3 (Thread 0x7f83a9ffb6c0 (LWP 1216236)): #0 0x00007f83d7294076 in __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x55dfc2f59214) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x55dfc2f59214) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55dfc2f59214, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007f83d72969fe in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dfc2f591c0, cond=0x55dfc2f591e8) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=0x55dfc2f591e8, mutex=0x55dfc2f591c0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007f83d84e0cab in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f83d9a145d5 in ??? () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f83d9a16a39 in ??? () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #8 0x00007f83d84daeb1 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007f83d7297ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444 #10 0x00007f83d732847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 2 (Thread 0x7f8375e6e6c0 (LWP 1213283)): #0 0x00007ffcb0dfcbb2 in ??? () #1 0x00007f83d72e557d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/sysv/linux/clock_gettime.c:42 #2 0x00007f83ca710f84 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #3 0x00007f83ca711039 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #4 0x00007f83cac6dbcd in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #5 0x00007f83ca823c67 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #6 0x00007f83ca8245af in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #7 0x00007f83cac587d8 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #8 0x00007f83ca7df0c5 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #9 0x00007f83ca7e032a in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #10 0x00007f83ca7e074f in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #11 0x00007f83ca781fca in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #12 0x00007f83ca72af91 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #13 0x00007f83ca72b45a in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #14 0x00007f83ca713b04 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.535.129.03 #15 0x00007f83d7297ada in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444 #16 0x00007f83d732847c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 1 (Thread 0x7f83d34da9c0 (LWP 1213265)): [KCrash Handler] #5 0x00007f83d8e75fa7 in QRegion::~QRegion() () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 #6 0x00007f83d8e2884a in ??? () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 #7 0x00007f83d8e1253d in QRasterPaintEngine::~QRasterPaintEngine() () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 #8 0x00007f83d8b97736 in QImageData::~QImageData() () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 #9 0x00007f83d8b97c0b in QImage::~QImage() () at /lib/x86_64-linux-gnu/libQt5Gui.so.5 #10 0x00007f83da53fe7c in KDecoration2::DecorationShadow::~DecorationShadow() () at /lib/x86_64-linux-gnu/libkdecorations2.so.5 #11 0x00007f83da0adc82 in KWin::Shadow::~Shadow() () at /lib/x86_64-linux-gnu/libkwin.so.5 #12 0x00007f83da08418d in ??? () at /lib/x86_64-linux-gnu/libkwin.so.5 #13 0x00007f83da0e8584 in KWin::Window::~Window() () at /lib/x86_64-linux-gnu/libkwin.so.5 #14 0x00007f83d9ff886d in KWin::Deleted::~Deleted() () at /lib/x86_64-linux-gnu/libkwin.so.5 #15 0x00007f83d86f976b in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #16 0x00007f83d7b6bc82 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5 #17 0x00007f83d86cc7a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #18 0x00007f83d86cfeb1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #19 0x00007f83d87286f7 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #20 0x00007f83d6313b2c in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #21 0x00007f83d636f46f in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #22 0x00007f83d6311d20 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007f83d8727daa in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #24 0x00007f83d86cb15b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #25 0x00007f83d86d3904 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #26 0x000055dfc0d1fb42 in ??? () #27 0x00007f83d72280d0 in __libc_start_call_main (main=main@entry=0x55dfc0d1f4e0, argc=argc@entry=2, argv=argv@entry=0x7ffcb0ddd538) at ../sysdeps/nptl/libc_start_call_main.h:58 #28 0x00007f83d7228189 in __libc_start_main_impl (main=0x55dfc0d1f4e0, argc=2, argv=0x7ffcb0ddd538, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcb0ddd528) at ../csu/libc-start.c:360 #29 0x000055dfc0d20fc5 in ??? () The reporter indicates this bug may be a duplicate of or related to bug 396729. Reported using DrKonqi
Are you by any chance using a non-default window decoration/titlebar theme? Also is Firefox in CSD mode, or does it have a KWin-provided titlebar?